bluuebunny/crossref_metadata_2025 huggingface dataset:
Radical cultural specificity in translation
Authors: Strowe Anna
Published: March 2020

Most existing discussions of cultural specificity in translation presume that although translation may be
difficult, the meaning of culturally-specific terms is at least known. This article considers the possibility of “radical cultural
specificity,” in which the meaning of the item is inaccessible to the reader or translator and no native participant in the source
culture is available to advise. Based on the concepts of culturally-specific items from the work of Javier Aixelá and radical
translation from the work of W.V.O. Quine, I develop the notion of radical cultural specificity using examples from medieval
Celtic literature, highlighting the role of knowledge and lack of knowledge in interpretation and translation. The concept is then
briefly applied to science fiction or speculative fiction as well, suggesting that these concerns are not merely the province of
scholars of historical literature.
Decontextualisation: some issues in the Southeast Asian urban and regional spatial constructs
Authors: Boon-Thong L
Published: March 2020

The problem of urban system in Southeast Asian countries (with the exception of Singapore, which is a city-state) is top-heavy. In the latter case, if the larger urban region of Jabotabek is considered, Jakarta has a population of some 30 million population, making it the largest urban conurbation in Southeast Asia! What led to these macrocephalic tendencies in Southeast Asia? This keynote paper briefly reviews the overall trend of Southeast Asian urbanisation and urban growth; and asseverates that the reactions/counter-reactions to these processes have decontextualised a quintessential and important maxim – “it is the people (whether social, cultural, or physical) that matters in cities”. There are three recognisable urbanisation processes and urban growth patterns in the last five to seven decades in Southeast Asia: 1) Superinduced Metropolitan Development, 2) Extended Metropolitan Region, and 3) Urban Convolution. Some disturbing features in the current strategies. Social disparity, Fragmented solution to QOL problems, Growing lead-lag disparity and Decontextualisation at the local level. Several pertinent questions ought to be asked. Will greenfield urban space development, like smart cities and new capital cities, lose their underlying charm of informality, like the para-transits (trishaws, tut-tuts) or the popular Southeast Asian al-fresco eateries (the street food vendors and hawkers)?
Climate extremes over the maritime continent and their associations with Madden-Jullian Oscillation
Authors: Sekaranom A B , Suarma U , Nurjani E
Published: March 2020

Madden-Jullian Oscillation (MJO) has a strong influence towards rainfall over The Maritime Continent (MC). Due to possible impacts towards extreme precipitation in this area, a study is required to determine the influence of those processes. This research aims to investigate the influence of MJO on extreme precipitations over Indonesian Maritime Continent. To investigate the influence of those three processes, satellite precipitation data from The Tropical Rainfall Measuring Mission (TRMM) 3B42 product and Real time multivariate MJO (RMM) Index are used. Several extreme indices are calculated to identify magnitude of the extremes by calculating the area coverage of a specific precipitation threshold in each climate zone. Principal component analysis (PCA) is implemented to these indices to reduce large number of data into smaller number of information. Correlation analysis is implemented to the PCA and then matched to the MJO index to identify degree of influence of each process. Comparison of winds and mean sea level pressure data during each phenomenon is conducted to identify the key elements that control the generation of extreme precipitation. The result indicates extreme rain events in Indonesia could be triggered by the MJO, particularly during phase 4-6.
Analysis of sinking incidence in the San Luis Potosí Valley, México
Authors: Tristán A C , García M D R , Cárdenas O R , Ovalle A G C , Putri R F
Published: March 2020

This research focused on the geospatial method application called Synthetic Aperture Radar Interferometry (InSAR) using Sentinel 1-A satellite images to determine the sinking incidence in the San Luis Potosí - Soledad de Graciano Sánchez conurbation area. In this study was carried out the processing and comparison of the sinking values resulting from the period 2014 to 2019, where the procedures showed that the sinking incidence that occurred in some areas of San Luis Potosí Valley was 13.4 cm, which means that a sinking of approximately 2.6 cm would be generated per year in the specific areas determined, as well as, with the results of the InSAR method was made a profiles graphic of the 5 years analyzed, with the aim of observing the behavior of soil sinking in the area studied. Likewise, 72 GNSS vertices were interpolated, which served to know the ground elevations in 2014, in order to correlate their differences according to the results of the interferometry process in the images using SNAP software.
Back-propagation in the neural network of visibility estimation model based on Himawari_8 Satellite during forest fire smoke periods on Sumatera and Borneo Island, Indonesia
Authors: Imanto H , Hartono  , Marfai M A
Published: March 2020

Smoke from forest and land fires may significantly impair horizontal visibility, which affects a wide range of aspects of life, including human health and transportation. Satellite and its remote sensing technology can monitor a target area spatially. Visibility, one of the proxies for smoke quantifiers, has been proposed as the product of a satellite-based model that can benefit human life. This study used back-propagation in neural network (BPNN), a machine learning technology, to develop a visibility estimation model based on The Himawari-8 satellite using several combinations of BPNN tuning. It also compared the estimated visibility estimation with METAR data, as well as root mean square error (RMSE) and R2 correlation to check its accuracy. In this case, visibility was classified into three, namely class 1 visibility (below 1,600 m), class 2 (between 1,600 and 3,000 m), and class 3 (more than 3,000 m). The results showed that the highest accuracy of the visibility estimation model was obtained from the combination of input bands no. 2,4,5,11, 13, 14,15, with R2 correlation of 0.703.
Comparative Morphological Differences of Stratovolcanoes in Indonesia
Authors: Malawani M N , Subandriyo  , Handayani T , Wicaksono G N
Published: March 2020

The aims of this research are to identify the comparison of morphological differences of stratovolcanoes and provide informations regarding to future hazard prediction. Several stratovolcanoes are compared to investigate the differences in their morphology and then comparison on their morphological parameters are performed. The comparison of stratovolcanoes morphology is based on DEM data from DEMNAS (DEM Nasional). In this study, we see that DEMNAS already presents good data for morphological analysis in regional scale. The morphological parameters used for the comparison are landform variation, slope, and drainage pattern. Those three parameters are not directly connected to one another, but they are useful for describing the volcano edifice morphological differences. We suggest that the landform analysis is the best method for identifying morphological differences of stratovolcanoes. In addition, slope and river pattern are useful also for predicting future volcanic hazard such as pyroclastic flow and lahar.
Development strategies of the agropolitan area in Cilacap Regency
Authors: Rifani A , Nugroho A D , Winaryo  , Tyas D W , Masduqi E , Topo A H , Hidayanti R , Masithah R A , Romadhon R D , Sulissetiyo T , Reniningsih
Published: March 2020

Various concepts of development dimension have been developed and applied in Indonesia. One of the regional development strategy concepts is the regional development based on the character of agropolitan resources. This research is intended to analyze the implementation of spatial planning of the Cilacap Regency, to describe distribution of agropolitan area and development strategy of its area. The analysis models used in this research are GIS, descriptive, SWOT and AHP. The study showed that the agropolitan cluster area is directed at Majenang, Wanareja, Karangpucung, Cimanggu and Dayeuhluhur Sub-district. Gandrumangu and Cipari Sub-district have a potential area to involve in agropolitan. Based on SWOT analysis, agropolitan area in Cilacap need S-O strategy to improve its performance. The strategies to improve agropolitan are regulations on developing agropolitan areas and controlling land conversion; human resources development; mitigation of climate change; strengthen agricultural institutions and farmers’ regeneration; credit/investment programs for agricultural businesses; expand the partnership network; promote the leading commodities; and procurement / build of agricultural infrastructure. Based on AHP analysis, the main strategy to develop agropolitan area is the local government needs to make regulation on developing agropolitan areas and controlling land conversion immediately.
Remediation of lead-contaminated soil from artisanal mining site using natural zeolite
Authors: Budianta W , Ardiana A
Published: March 2020

One of the impacts of artisanal gold mining (ASGM) activity is lead (Pb) contamination in soil. This research was conducted on the Pb contaminated soil at the ASGM sites in Banyumas and Wonogiri in Central Java and Kulon Progo in Yogyakarta. This research aims to conduct a study of Pb mobility in contaminated soil and laboratory experiment to carry out remediation of Pb contaminated soil using natural zeolite with the batch test. The results showed that the Banyumas soil sample had higher Pb mobility compared to the other two soil samples. The batch test results showed that zeolite application useful to reduce Pb in the contaminated soil samples, where the Banyumas soil sample results in optimum value results due to the highest Pb mobility. The batch test results also showed that pH was a significant factor in the remediation process. This study concluded that the zeolite application reduces the concentration and mobility of Pb in the soil and affect the sorption by plants.
Feasibility analysis of fresh water condition in Mangunan Village - Dlingo Subdistrict after Bantul earthquake of May 27th 2006
Authors: Putri R F , Sumantyo J T S , Sulistya A R
Published: March 2020

The earthquake of May 27th 2006 has caused drought to several water sources in Mangunan village. Hence, it needed a preliminary study on the hydrology condition in the aftermath of earthquake in Mangunan Village – Bantul. Methods to identify the hydrology availability and water need condition using data calculation discharge and geometric population growth. According to the measurement result in Mangunan Village, the actual water availability is 128,484 m3/day, which can cover the water requirement to fulfill the need of the people amounting to 657,75 m3/day. Although, in fact, the village potentially has enough water availability with the amount of 14.037,845 m3/day. So, a further research could be done to achieve a stable condition of the dynamic discharge. Groundwater conservation is very needed in this research area. In general, the dry region in the village needs to be planted with vegetation that are resistant to dryness in the region with shortage of water and also with plants that do not absorb much groundwater or soil mosturizer.
Geosonar for impermeable layer mapping in urbanized Upper Belik catchment, Yogyakarta
Authors: Munawaroh N , Puspitasari N N A , Hadi M P , Suarma U
Published: March 2020

The scarcity of water in most Yogyakarta grounds water basin is because of decreasing the groundwater recharge as the implication of the build-up area growing. One exception is in Upper Belik Watershed in which more than 95% covered as paved area. In order to reduce the runoff, the infiltration well must be applied. The artificial well design depends on the characteristics of impermeable layer that can be seen by its depth. So the analysist of impermeable layer depth is extremely important to be researched. Distribution of the impermeable layer can be interpreted using Geosonar. Therefore, the purpose of this research is to find the distribution of impermeable layers in Upper Belik Catchment. The primary data used systematic random sampling base on grid size 125x125 m. Spatial data analysis of the impermeable layer utilized to visualize the result of material type which consists of sand, little gravel, tuff, clay sands, sandy clay, and gravel in research location. Variation of impermeable layer depth divided into 5 classes which are: I (9-10 m); II (10-20 m); III (20-30 m); IV (30-40 m); and V (>40m). The composition of the impermeable layer material dominated by clay and tuff in Upper Belik watershed and located below the groundwater level.
Landform analysis to arrangement “Land Utilization Type” in Galur Sub-District, Kulonprogo
Authors: Suratman  , Putra A U , Mardiana A
Published: March 2020

Galur is one of the sub-district in KulonProgo Regency. Its land usage is dominated in intensive agricultural usage. The various type of the agricultural activities in study area has different type of land productivities depends on its land capabilities. Land capability analysis with landform approach become the base in this study to identify the sustainable “land utilization type” (LUT) and the land productivity optimal value in Galur sub- district. Observation, measurement, and interview was done by using the Land Classification and Land use Planning (LCLP) tool. Landforms that has productive value identified in this study are: alluvial plain (IId-3), beach ridge (IIIP-2), and beach (VIIIP). The usage of alluvial plain could be rice-(corn/nuts)-rice or could be replaced with rice-chili-rice. The usage of beach ridge could be the planting of plantation crops such as melon, onion, and chili, and could be the farming of goat and chicken. Land usage type in beach is left naturally because it has land capability type VIII (low capability).
Urban environmental management: an effort toward Magelang smart city
Authors: Rachmawati R , Imami Q , Nasution L A , Choirunnisa U , Pinto RPA , Pradipa H
Published: March 2020

The city of Magelang presently belongs to the Movement of 100 Indonesian Smart Cities. It is conducted by the Ministry of Communication and Information Technology of the Republic of Indonesia. One of the elements that needs to be studied to support a smart city is smart environment. To support the achievement of a smart city, it is necessary to establish a well-managed urban environment. Therefore, this research is aimed at analysing the smart urban environmental management of the city of Magelang, identifying the management of urban environment related to the aspect of smartness, and identifying the role management of urban environment toward the achievement of smart city. The result of the research shows that the presently-implemented environmental management has supported the achievement of smart city for the city of Magelang. The local government, private sectors, and local community have played an important role to achieve the environmental management in supporting the implementation of the smart city for the city of Magelang.
Maximizing the water resource potential in Girikerto Village, Sine Subdistrict, Ngawi Regency by establishing bottled water home production
Authors: Pradhita A N , Panuluh D J D , Arifin D C V , Waskitho S , Wiguna T S , Syahbudin A
Published: March 2020

The importance of water in human being’s life is an undeniable fact. On that part, water can have countless function and holds an important key to the development of a civilization. On this paper, a procurement of commercializing the water potential of Girikerto village, on the north slope of Mount Lawu in Ngawi Residence, East Java, Indonesia was held. The enormous water source in Girikerto has potential for Produksi Air Minum Dalam Kemasan or bottled water production as a local commodity water product. The non-filtered water taken from samples is tested for the bacteria, and compared to the water after filtration system is installed. By installing less-sophisticated homemade water filter, the coliform bacteria could be eliminated by 99,14%. The economic advantages of producing bottled water is also profitable, since it could generate sales up until 10 million rupiahs, profit margin 0.54, and return on asset reached 3,15.
A projection production and consumption of food crops in Bali Province towards 2021-2025
Authors: Fauziyanti N U , Alfana M A F , Putri R F
Published: March 2020

The development of tourism sector in Bali Province with a limited area become an essential issue in their potential production and consumption of food crop in the future. This study aims to 1) knowing food crops productions projection in Bali province towards 2021-2025; 2) knowing food crops consumption projection in Bali province towards 2021-2025 and 3) gap analysis projection between production and consumption of food crops towards 2021-2015 in Bali province. Production and consumption calculation based on analysis of exponential growth and consumption per capita. The study result shows that there is a condition of food deficit on projections towards 2021-2025 in Denpasar and Badung District in 2024-2025, implication of land-use change rapidly. Bangli District has a food deficit in 2021 and the following year has a surplus as an implication of the collaboration between farmers and the Department of Agriculture to activated subak and pest management. Karangasem District predicted food deficit in 2025 as an implication of a decrease in land productivity due to volcanic ash as a result of eruption Mount Agung that occurred in 2017 to 2019 as this time.
Determinants of rural household food security in Indonesia: the case of protein-based food consumption
Authors: Umaroh R , Pangaribowo E H
Published: March 2020

A large number of households in Indonesia, especially those in rural areas, still depend on the agricultural sector. In order to meet their food needs, including protein-sourced food, rural households both produced and purchased their food consumption. This study aimed to analyze whether the consumption of certain self-produced protein-based food, namely, beans, tofu and tempeh, meat, poultry, fish, and milk, contributes to the food security of rural households in Indonesia. Using data from the fourth- and fifth-wave Indonesian Family Life Surveys in 2007 and 2014, the study applied the Quadratic Almost Ideal Demand System (QUAIDS) model to examine the determinants of protein-based food demand. The results reveal that rural households consume more plant-sourced protein than animal-sourced protein. It is also shown that the socio-demographic characteristic of the household such as household structure, the education and age of the household head affect differently on type of protein-based food consumption. These results suggest that self-produced food can be seen as a strategy for rural households to meet their protein-based food consumption. Self-produced food households also tend to be more food secure than the counterpart households.
Classification of anthropogenic landforms in the rural area: study case Bompon catchment, Central Java.
Authors: Adzima A F , Setiawan M A , Mardiatno D
Published: March 2020

Geomorphologists have considered the anthropogenic process as one of important factors in landforms studies. Numbers of anthropogenic classification are recently introduced without clearly monitoring the relationship between the classes and map scale. This study was designed to classify the anthropogenic landforms in Bompon catchment at a detailed scale. We employed a descriptive and observational survey using the traverse method at 1:10,000 and 1:2,000 map scale. The former created a path of travel with a width of 100 m and 20 m along the stretch of the catchment area. The observation points were selected based on the human activities encountered along the path and in the representative areas, namely type of intervention, formation process, and area. The anthropogenic landforms were grouped according to the modified classification of Szabó & Dávid. The results indicated that human intervention or land transformation occurring in Bompon catchment fell into the categories of Agrogenic, Urbanogenic, Traffic, and Water Management. Each of the four landforms was visible in 1:2,000 map scale, but only the Agrogenic and Urbanogenic ones were classified on a scale of 1:10,000. Denudation, construction, and association are the dominant process in the formation of anthropogenic landforms in the study area.
Farmer’s perception and knowledge on landslide occurrences in Beruk Village, Karanganyar Regency, Central Java
Authors: Aditya B , Amri I , Putri R F
Published: March 2020

Karanganyar Regency is one of the most prone area to landslides in Central Java. According to DIBI records, 77 of the 149 types of natural disasters that occurred in this area were landslides during 2008-2018 and the trend tends to increase. In disaster management, the ability of the community to reduce the risk of landslides is reflected in capacity. The objective of this study is to know the farmers understanding on landslide factor, landslide occurrences and impact, and landslide mitigation in Beruk Village, Karanganyar Regency. The data was collected by interview to 109 farmers household, and the analysis was conducted by descriptive analysis. The result shows that the landslide is mostly caused by heavy and long duration of rain, indicator for landslide is ground cracks, and the mitigation mechanism is based on local knowledge of farmers such as managing irrigation system, planting trees, and managing land utilization. In Beruk Village, disaster management process is more to be responsive rather than preventive and the knowledge of farmers on land management play an important role in disaster risk reduction.
An estimation of water economic value of the karst area of Jonggrangan (case study: catchment area of Mudal, Kiskendo, and Anjani Caves)
Authors: Ramadhan C , Harini R , Adji T N , Pratama A D , Dwiputra D S
Published: March 2020

The Jongggrangan Karst Area is one of the karst areas whose potential data inventory has not been well studied through studies of spatial and temporal variability. Research on the potential economic data of the Jongggrangan Karst Area is useful as a basis for making decisions on the management. The objectives of this study are: 1) to know the availability of water in the Jongggrangan Karst Area; 2) to know the estimated economic value of water that can be produced by the Jonggrangan karst Region. The primary data used is flowrate as measured by the velocity area method, and water level data along with rainfall recorded automatically by a logger. Secondary data used are water price data obtained from relevant agencies. The results of the study indicate that the study area has abundant resource potential. The availability of water in the study location reached 23,825,512.4 m3/year from the Mudal Cave spring and the underground river of Kiskendo Cave and Anjani Cave. The value of the availability of water produced is able to meet the needs of water for a decent human life of 14,890 people per year and with an economic value of IDR 47,651,024,980.00 per year.
Landuse change and its impact on rice productivity in Sleman Regency 2007-2017
Authors: Herdiansyah A R , Hastari N R F , Ramdani H P , Putri R F
Published: March 2020

Landuse change is a serious phenomenon which faced by some of the suburban areas. Sleman Regency is one of regencies that is located in suburban area or outskirts of Special Region of Yogyakarta. The imbalanced between the need or the demand and the availability of land in Special Region of Yogyakarta, trigger a city expansion to the surrounding areas, especially in Sleman Regency. The purpose of this research is to study and to examine the impact of landuse change towards to the paddy productivity in Sleman Regency. The landuse analysis was performed by comparing the RBI map of Sleman Regency in 2007 and the RBI map of Sleman Regency in 2017. The result of the research showed us that during 2007-2017 period, the decreasing areas were fields by 0.93%, shrubs by 0.12%, and rice fields by 47.5%. Landuse that experienced increase in area were buildings by 2.89%, plantations by 12.62%, and settlements by 34.26%. The decreasing area of paddy fields did not significantly reduce the productivity of the rice. Rice production from 2007-2017 period is stable and tends to be increase. That is because the area of harvested land from 2007-2017 has also increase due to the agriculture diverification program in Sleman Regency. This research shows us the projection of paddy productivity until 10 years later from 2017.
Estimation of atmospheric carbon sequestration rate through carbonate rock dissolution in Karst Jonggrangan, Java Island, Indonesia (case study: the underground river of Anjani Cave)
Authors: Dwiputra D S , Adji T N , Pratama A D , Haryono E
Published: March 2020

Karst has an important role in atmospheric CO2 sequestration through the karstification process. Through the karstification process, the total amount of carbon dioxide absorbed in Indonesia is estimated to reach 13482 Gg CO2/year. This research was conducted in the Karst Jonggrangan area, focused on the underground river of Anjani cave. The objectives of this study were: (1) to determine how much the dissolution rate of CaCO3 minerals was, and (2) to calculate the atmospheric carbon sequestration rate through the carbonate dissolution process that occurred in the Anjani underground river. This research was carried out between March 2018 and March 2019. The data used were time-series of discharge and hydrochemical data, as well as discharge properties of the Anjani underground river. The entire data was obtained through the installation of a water fluctuation recording device and field measurement of hydrochemical parameters and the discharge characteristics. The results showed that the rate of carbonate rock dissolution in Anjani underground river was 37.54 m3/year/km2, while the sequestration rate of atmospheric carbon dioxide reached 97.43 tons/km2/year. The temporal variation in carbon dioxide absorption and dissolution rates was influenced by total discharge, dissolved CO2, and HCO3
− content in the water, temperature, and pH.
Water quality analysis of Bembem Doline Pond in Gunungsewu Karst area, Gunungkidul regency
Authors: Khansa S.A.A.N. , Widyastuti M. , Nugroho Adji Tjahyo , Naufal Muhammad , Agus Riyanto Indra , Ramadhan Fajri
Published: March 2020

Dry seasons often lead to drought in Panggang Subsystem, part of the undeveloped Gunungsewu Karst that has minimal water resources in its springs and underground rivers. The local people have relied on karst lakes as the primary water source for various activities, such as bathing and cloth washing. Bembem Doline Pond is located in Giriasih Village, Purwosari District, Gunungkidul Regency and is part of the Panggang Subsystem. Aside from its intensive use, many factors are contributing to its water quality degradation, namely seasons, doline pond characteristics (e.g., water volume), landuse on the watershed, and the pattern of water use. This research intended to identify (1) the characteristics and (2) the water quality of Bembem Doline Pond in the early and mid-rainy season. For the water quality analysis, samples were collected from five points, which were selected by purposive sampling technique. This sampling took into account the location of the water inflow and part of the doline pond where human activities took place in November 2018 and January 2019. The test included three types of water parameters, namely physical (temperature, EC, and TDS), chemical (pH, nitrate, phosphate, detergent, and BOD), and biological (total coliform). The results showed that the water volume of Bembem Doline Pond in the mid of rainy season is 1,467.4 m3. Landuse in the watershed are dominated by plantation (45%) and dry farmland (34%), and some were covered by water bodies (14%), roads (2%), buildings (4%), and settlements (1%). The water quality of the doline pond was found to depend on seasons and human activities on the doline pond considerably. The pollutant levels inclined to be higher in the early than the mid-rainy season. In the former, human activities mostly played a part as pollutant supplier, while in the latter, runoff water from agricultural fields in the watershed contributed the most. According to the Regulation of the Governor of the Special Region of Yogyakarta No. 20 of 2008, the majority of the test parameters exceeded the quality standards for Class II water.
Comparison of tidal model using mike21 and delft3d-flow in part of Java Sea, Indonesia
Authors: Fadlillah L N , Widyastuti M , Sunarto  , Marfai M A
Published: March 2020

This article presents about the comparison between two numerical model for tidal modelling. The tidal in North Coast of Central Java, a part of Java Sea were modelled in 2D to get the sea water level using DELFT3D and MIKE21 in order to identify model performance and efficiency. As the results, both model’s bathymetry results show similar interpolation. Both models have been shown to be able to perform small error on tidal models but still need to be revise in further research. The K1 is dominant tidal constituent in the North Coast of Java sea. Unstructured grid results to be more efficient in running time and grid construction. This research is a preliminary research and will be developed in further research.
Study of Hydrogeomorphological Springs in Tlegung Watershed, Kulonprogo Regency
Authors: Santosa L W , Narulita R L
Published: March 2020

The spring characteristics such as spring discharge, temperature, EC, TDS, pH, spring stream character, and spring emergence type can be linked to geomorphology. This link is the main study in this research. This research was conducted in Tlegung Watershed, which is mostly located in Samigaluh and Kalibawang District, Kulonprogo Regency. The purposes of this study are to determine the springs distribution pattern and the springs hydrogeomorphology characteristics, also to analyze the hydrogeomorphological factors which control the springs’ emergence and characteristics. Data collection method which used in this research is survey method to determine the source of spring emergence, measure spring discharge, test springs’ physical and chemical quality, and validate geomorphological interpretation. The other method which used is collecting secondary data from institution such as RBI maps, geological maps, satellite imagery, etc. The result showed that all springs in Tlegung Watershed classified as perennial springs and gravitational springs with depression, contact, and fracture springs type. Springs discharge in the Tlegung Watershed are classified in Q3 class (10-100 liters/sec) to Q5 class (<1 liter/sec). Electric Conductivity (EC) of all springs are classified in the EC1 (fresh water) with an average of 229,24 μmhos/cm, whereas the average value of TDS is 116,09 mg/L. The value of EC and TDS in the upstream watershed tend to be lower than the value of EC and TDS in the middle and downstream watershed. Hydrogeomorphological factors that control the emergence and characteristic of springs, including rock contact between old vulcanic rocks and limestone, crack structures found in andesitic breccia rocks, and slope class changes between slope 13-20% and 20-55% and 20-55% and 55-140%.
A groundwater tracing investigation to determine Kalisirah Karst Springs catchment area, Kebumen Regency, Central Java
Authors: Astuti E S , Rahmawati A I , Setyawan A , Alghozali Q , Agniy R F , Fauzi D R , Mahrizkhal D S , Nurkholis A , Pratama A D , Dwiputra D S , Laksono G E , Siswanto A D , Adji T N , Haryono E
Published: March 2020

Water tracing was conducted at Karangbolong Karst as a rapid assessment of the Kalisirah spring hydrological characteristics. This study was conducted to determine the movement of underground flow and the estimation of the Catchment Area using the Todd Nomogram and field observations. The results of flow tracing tests conducted in Pocung Cave indicate that there is underground river network connectivity between Pocung Cave, Jeblosan Sinkhole and Kalisirah Springs. Based on topographic survey and flow tracing test, the calculation of the estimated area of the Kalisirah catchment area is 180 Ha. The results were also validate using other parameters, namely flowrate and rainfall in the research location using Todd Nomogram. The estimated area of the Kalisirah catchment area with the Todd Nomogram is 189.2 Ha. The calculation of the estimated area of Kalisirah catchment area based on topographic survey and water tracing is relevant with the estimated area with Todd Nomogram. Groundwater tracing investigation can be used to determine karst spring catchment area, as a preliminary study to understanding the karst hydrology.
Study of shrimp pond effluent purification on mangrove ecosystem of River Pasir Jangkaran Village Kulon Progo Regency
Authors: Damayanti E , Suprayogi S
Published: March 2020

The research is located in Pasir River, Jangkaran Village, Kulon Progo Regency. Landuse in Pasir River are dominated by shrimp ponds. Mangroves on the riverbank can reduce the concentration of nutrients in shrimp pond effluent. This study aims to determine the purification of shrimp pond effluent in the mangrove ecosystem by comparing the quality of shrimp pond effluent before and after passing through the mangrove ecosystem. The research method used is the field survey method and laboratory analysis. Water sampling and identification of mangrove characteristics were done purposively on 6 observation segments. Data analysis was performed graphically, descriptively, spatially, and comparatively. The results show that mangrove ecosystems can reduce concentration of nitrate and phosphat in shrimp pond effluent as evidenced by a decrease concentration of nitrate in segments 1 to 6. The nitrate concentration in the mangrove ecosystem and after passing through the mangrove are smaller than before passing the mangrove. The characteristics of mangroves that affect the purification process are species and density of vegetation. Species mangrove Rhizophora mucronata with higher vegetation density can reduce the concentration of nitrate in SPT 1 to 4 better than species Avicennia marina with lower density in segment 5.
Discovering the river outlet current by using simple field measurement (case study of Kendal Coastal Area)
Authors: Trihatmoko E , Sadewa Wiguna H , Juhadi  , Sunarto  , Aris Marfai M
Published: March 2020

Theoretically, in the natural condition the wind is main energy induce wave and sea surface current. The measurements related to the wind patterns may indirectly reflect the condition of waves and the sea surface current. Other theory stated that in some cases, sea surface current has different direction depending on the bathimetry condition or other local factors. This research aimed to discover the correlation between wind and sea surface current direction in Kendal Coastal Area, focussing on nearshore zone nearby Bodri Rivermouth. The research was conducted by a simple measuring instrument for detecting sea surface current direction. The background of this research was the occurrences of the lost people drowned in the research area and being related to the mystical phenomena by the coastal community. The results showed that the correlation values of the wind and sea surface direction up to 0.40 and 0.09, each for point 1 and point 2, respectively. Those differences between wind and sea surface current direction imply that the results against the first wind direction theory. However, the results revealed that the existence of river mouth is the main factor that influences the different pattern of the sea surface current and wind direction. It is proof that the outlet current exists in the research area.
Unit hydrograph method for curve number validation in hydrological modeling: case study of Welaran Watershed, Karangsambung, Kebumen
Authors: Hadi M P , Syamsiyyah N J L , Annisa L
Published: March 2020

Unit hydrographs, which have long been used in hydrological analyses, assume or require evenly distributed rainfall as their input. In practice, such a requirement is met when the methods are applied to small watersheds. This study aim to validate the curve number in hydrological modelling used unit hydrograph. The Welaran Watershed in Karangsambung has an area of 11.6 km2. More than 50% of it is covered by rice fields, while the rest is by dry agricultural lands, multiple-species plantations, and settlements. This watershed has been installed with a stream gauge equipped with AWLR and ARR. Based on the automatically recorded flood and rainfall data, a hydrological analysis was performed to generate unit hydrographs. Baseflow (losses), separated from the hydrograph, was compared with a loss of water using the Curve Number (CN) method. CN was derived from a reference table containing land use (LU), soil hydrological group, andantecedent moisture condition (AMC).The CN of the study area was 67, which is the weighted value of the mapping unit. Insome rainfall-runoff events, the unit hydrograph approach yielded curve numbers varying between 23-82 for eight selected rainfall events. It indicates that many factors shape the diversification of rainfall-runoff interaction in a watershed, including the actual distribution of rain. Also, AMC seemed to be distributed according to not only the amount of previous rain but also other factors that need further study.
Determination of reaction rate constant for increasing pH level in geothermal hot spring
Authors: Mauren B C , Kharisma N I , Harto A W
Published: March 2020

Geothermal hot spring can be used as source of hot bath. It contains mineral elements such as Cl−, K+, Na+, and SO4
2−. One of geothermal hot springs in Leilem, Sulawesi Utara, is categorized as Acid Sulfate Water. Leilem geothermal hot spring contains high acid sulfate and causing the pH level reach to 1. Leilem hot bath is categorized into acidic type. In order to reach mildly acidic type, the pH level should be up to 4. The method research to increase the pH level is to flow the hot water to the stack of CaCO3. To design the system, the reaction rate constant should be known. These constants are assumed to follow the Arrhenius’ equation, k = A e^((-Ea
)/RT).The value of frequency factor (A) and activation energy (Ea
) are collected through a laboratory scale experiment of H2SO4 with CaCO3 (powder) by using variant variables of the temperature of water and the mass of CaCO3. Based on the result of the experiment the value of A is 1.8 and Ea
18.515 J(gmol)−1 and the research successfully increases the pH up to 4 or even higher.
Water balance evaluation in Penanggungan hamlet Wanayasa sub district Banjarnegara, district Central Java province
Authors: Rachmawati W S , Suryatmojo H , Ngadisih
Published: March 2020

A key issue of watershed management in Indonesia is massive forest conversion in the upstream area. Forest conversion to agricultural land occurred in the Merawu watershed. Penanggungan Hamlet located in the upstream area of Merawu watershed, where the economic resources is potato (Solanum tuberosum L) farming. The agricultural and domestic water needs are supplied by 5 springs water in the surrounding areas. Intensive farming needs a large portion of water. Inefficient water utilization pattern and the El Nino phenomena may raise water competition among agricultural and domestic sectors in Penanggungan. Deficit water was occurred in the Penanggungan Hamlet, particularly in the dry session. The purpose of this study is to evaluate the water availability based on regional water balance and design the drought mitigation. Regional water balance focused in terms of demand and supply. The water demand covers daily household needs such as cooking, bathing, toilet, washing dishes, laundry, cleaning the floor, washing vehicles, watering yards, and drinking. The demand likewise comes from farming sectors for irrigation and pesticide application. The demand calculated for one year. A water need census in Penanggungan was conducted to acquire data on the amount of water per sector. Water supply calculated from the discharge of 5 springs for one year. Prediction of water needs used three parameters i.e., population, total household and agricultural water needs. This study reveals that the water demand in Penanggungan Hamlet is surplus until 2031 but in 2032 until then it experiences a deficit.
Spatio-temporal mapping of ecotourism activities in Buleleng conservation zone: a methodological review
Authors: Mutaqin B W , Marfai M A , Helmi M , Rindarjono M G , Windayati R , Sunarto
Published: March 2020

In Bali, economic benefits from tourism in 2017 is IDR 50,241.07 billion and unfortunately still dominated by districts in the south and the east of Bali, e.g., Badung, Denpasar, and Karangasem. Better coastal environment conditions in Buleleng District, environmental problems related to water quality and domestic waste management in the south and the east of Bali, as well as Buleleng new airport planning in 2025, will undoubtedly be a turning point to economic competitiveness in this area. This review represents brief information of the methodology that can be used to identify and to map ecotourism activities spatially and temporally. With this review, the purpose is to give information and solution related to several methodologies, which can be used to address constraints that can lead to inappropriate expectation concerning the outcomes of the study of spatio-temporal mapping of ecotourism activities.
Peat swamp forest-firesimpacts on local livelihoods: a case study in Kapuas Kahayan Protected Forest Management Unit, Central Kalimantan, Indonesia
Authors: Suwito D , Suratman  , Poejirahajoe E
Published: March 2020

Peat swamp forests have received great global attention in the last few decades because of their carbon stock, which is closely related to climate change and global warming. In addition to the global role of peat swamp forests in climate change and carbon storage, peat swamp forests also have some social and economic functions because of their great contribution to the livelihoods of local people. In Central Kalimantan, peat swamp forests have been experiencing a massive degradation mainly due to fires. This study aims to describe the utilization of peat swamp forests and the impacts of peat-swamp-forest fires on local people’s livelihoods in Central Kalimantan. The research was conducted by interviewing local communities around the area, then the data were analyzed qualitatively. The study result shows that there are 8 utilization activities related to livelihoods by local people on peat swamp forest i.e. logging; gathering rattan, orchid, medicinal plants, grasses and epiphytes, damar, gemor (tree bark); fishing and hunting; freshwater utilization, foods gathering, sacred spots for local belief, and traditional agriculture. Overall, forest fires have significantly negative impacts on local livelihoods as fires cause the loss of biodiversity and decrease the quality of ecosystem services. These losses lead to the disappearance of income and food sources for local people. However, there are also some small advantages or positive impacts of forest fires i.e higher production of fish after forest fires, and more jobs in forest rangers and land rehabilitation from both government and non-government organizations.
An analysis of urban public transportation in Yogyakarta: case of Trans Jogja Bus
Authors: Marwasta D , Handoko R K
Published: March 2020

Transportation is the movement of humans or animals, goods, and information from one location to another. In other words, the action of transport is defined as a particular movement of an organism or thing from a point. Transportation is a derived demand that follow all basic human needs. The more populated of certain area, the more intensively of transportation, and it triggers the transport congestion. Public transportation is one solution to minimize congestion problems due to the large number of private vehicles. This study aims to (1) identify potential users of the Trans Jogja Bus; and (2) analyze the level of Trans Jogja bus occupancy. This study use quantitative research method, i.e. survey method, by using questionnaire instruments for conducting structured interviews and check lists for conducting observations. The mechanism for obtaining data in this study are by collecting primary and secondary data. The location of the research is Yogyakarta City and its surroundings which are covered by Trans Jogja Bus routes. The data was processed with SPSS 19.0 software and analyzed by quantitative descriptive analysis techniques. Results of this research shows that: (1) all of Trans Jogja Bus route actually have potential trip generation, as well as trip destination, however; (2) the occupancy level of Trans Jogja Bus are still little bit low even though service level is quite good.
Vulnerability of economic resilience of slum settlements in the City of Palembang
Authors: Sukmaniar  , Pitoyo A J , Kurniawan A
Published: March 2020

This study aims to look at the economic resilience vulnerability of slums in Palembang City. The method used is a quantitative descriptive of the results of cross tabulation using 382 respondents in each head of household spread in 64 locations of slum areas in the slum city of Palembang . Data collection techniques in this study using survey methods with area proportional random sampling. The results of this study indicate the amount of income is more thanRp. 2,000,000 which reached a percentage of 56% and found significant differences in income levels of more than Rp. 1,500,000 to Rp. 2,000,000 between migrant and non-migrant population. Results vulnerabilities economic resilience of society shows that there are 93,5 % the economic situation equally between income and expenditure so as to have a higher susceptibility to the weak economic resilience families in slum communities in Palembang.
Economic inequality and its impact on human development: insight of Banten Province 2011-2015
Authors: Septianingrum R S , Aditya B , Wijaya A P , Irshabdillah M R , Husna N A , Putri R F
Published: March 2020

Development is a strategy to improve the welfare and quality of life. UNDP concept explained that economic and human development has interrelated relation. Meanwhile, economic development in a region often face inequality and may cause another impact to disparity on human development. This study has the objective to measure and explain the inequality on economic development and understanding its spatial-temporal correlation with human development by the time 2011-2015. The methods that use in this study are Williamson Index (WI), Location Quotient (LQ), Klassen Typology, and Pearson Correlation. The result shows there is inequality on economic development with WI 0.95 in 2011 and decreased in 2015 with WI 0.77. Inequality on economic development influenced by the different economic structure within regencies/municipals. In the context of temporal and spatial data, economic development has a strong correlation with human development in province level and regency level. The government should improve economics, health, and education infrastructure in allregion as an attempt to realize the equality and sustainability development in Banten Province.
Reliability Analysis of Loess Landslide Stability Under Earthquake
Authors: Mu Peng
Published: March 2020

Traditionally, the stability coefficient of the fixed value analysis method is used as the evaluation index of the stability of the loess landslide under the earthquake. This method does not consider the randomness and variability of the calculated parameters, which can not reflect the real stability of the landslide. Based on this reality, this paper establishes the reliability analysis model of loess landslide stability under earthquake, and the model is used to evaluate the seismic stability of a loess landslide.