bluuebunny/crossref_metadata_2025_split huggingface dataset:
Drought analysis in Bedadung Watershed based on a Geographical Information System
Authors: Rofiq Kurniawan Ainur , Bisri Mohammad , Suhartanto Ery 
Published: February 2020

Abstract
Reduced water availability toward water needs is an indicator of the occurrence of a drought. Droughts have received greater attention from the Government of Jember Regency in the form of management directions for drought disaster areas. The location of this research is the Bedadung River Watershed, with 13 rain posts located upstream of the Rowotamtu AWLR Station. Drought analysis used the Palmer Drought Severity Index method in the form of an index that informs the level of drought in an area. The results of the study showed that drought with extreme dry classification occurred from June to October with drought index values ranging from -1.820 (June average) to -14.140 (October average). Patrang, Jelbuk, Arjasa and Panti Sub-Districts are areas that have experienced droughts with a duration of 5 months. The Palmer method meteorological drought index and hydrological drought index (value of AWLR Discharge Standardized Box Cox Transformation (Z)) have a unidirectional relationship and a very significant relationship, with the Pearson correlation coefficient being r = 0.905.
Numerical Simulation of Breakwater Layout in Puger Beach Jember Due to Tidal Wave
Authors: A. Royyan Maulana MA , Utami Agung Wiyono Retno , Fery Irawan Januar , Bintang Pratama Munawir , Halik Gusfan , Yunarni Widiarti Wiwik 
Published: February 2020

Abstract
Puger Beach is located in the south Coast of Java Island which is directly facing the Indian Ocean. The ease of the ship to sail is influenced by the conditions of water in the port which caused by tides. The elevation of the crest of a breakwater is determined by the maximum high water level, while the depth of the shipping lane / port is determined by the minimum low water level. The purpose of this research is to evaluate the breakwater performance by analyzing the surface water level and flow velocity caused by tidal wave in Puger Beach using Delft3D-Flow. The bathymetry data obtained from BIG (Geospatial Information Agency of Indonesia) were utilized for the simulations. Tidal observation results from the previous study were used to validate the model. Two scenarios of breakwater layout were simulated. Spatial variation of flow velocities in the highest tide, the minimum ebb, and representative time steps for both cases are presented. It is shown that using the modified layout of breakwater, the flow velocities become smaller and more stable than that of the existing layout. Using breakwater in the right and left hand side of estuary, high velocities are able to be reduced. Based on the flow velocity pattern in five observation points and the water level, it is confirmed the modified breakwater layout of is more effective than that of the existing one.
Determining water price for public water supply from Jatigede Reservoir
Authors: Muldianto Harya , Andawayanti Ussy , Suhartanto Ery , Soetopo Widandi 
Published: February 2020

Abstract
The “user pays” principle is one of the principles of Integrated Water Resource Management. Water price should be set optimally, high enough to complement subsidies, but within the ability of users to pay for the water. This paper discusses the optimization of the water price for public water supply by considering the dominant parameters related to operational costs, government subsidies, and the ability to pay. The study location is the Jatigede reservoir, located in the Province of West Java with an effective reservoir volume of 877 million m3, and supplying public water supply at a rate of 3.5 m3/s. To investigate the feedback loop of the complex system of water price optimization, the system dynamics approach was applied. The study results showed that the water tariff for raw water reaches a numerical balance and can meet the annual operation and maintenance costs by up to 100%. The results of the analysis of the system dynamics model showed that the optimal price for raw water supply is lower than the price of raw water in other river basins.
Determinant study for improvement priorities of irrigation assets (a case study of Kedungrejo irrigation network in Pilangkenceng sub-district, Madiun regency – Indonesia)
Authors: Panji Nugraha Yosua , Wahyuni Sri , Budi Prayogo Tri 
Published: February 2020

Abstract
Irrigation plays an important role for increasing agricultural production in order to achieve national food sovereignty. However, in reality, requests of funding for the purpose of irrigation network management from year to year are not always fulfilled according to needs. As such, to resolve this issue, it is necessary to determine improvement priorities for repairs of irrigation assets so that management may be optimally carried out. The aim of this research is to determine and analyse the improvement priorities of irrigation assets in one of the irrigation areas of Madiun Regency. This study utilized the modified Irrigation Network Performance Evaluation Criteria and Weightings for the year 2018. In addition, statistical tests as the Kruskal-Wallis and Mann-Whitney tests were utilized, as the obtained data were in the form of rankings. Google Earth and ArcGIS software were utilized to facilitate the understanding of the conditions and management of all the assets. The required data was the inventory of the irrigation network. The results of the study showed that the Kedungrejo Irrigation Network has 10% of irrigation assets in very good condition, 37% in good condition, 49%, in fair condition, and 4% in poor condition. The highest ranking (ranking 1) was for the spillway, while the lowest ranking (ranking 82) was for a bridge.
Analysis of inundation reduction in drainage channels in the coastal area of the City of Palu with environmental insights
Authors: Ismayanti Romadona Irenne , Andawayanti Ussy , Nur Cahya Evi 
Published: February 2020

Abstract
Inundations occur and become problems in the City of Palu. Inundations occur due to outdated drainage systems, high levels of sedimentation, rapid urban development and topography that tends to be flat. The offered alternatives are rehabilitation of existing drainage channels, storage pond equipped with an automatic valve door, rainwater harvesting and gully plugs. Rehabilitation is performed by adjusting drainage depth, with consideration of the shallow groundwater in the area. For rainwater harvesting, the capacity of rain barrels varies from 350-1050 litres, and they are equipped with reservoir wells. With combinations of these alternatives, the inundation reduction effectiveness of catchment area (DTA) 1 is 93.5% and 99.6% for DTA2. Comparing the results to gully plugs, the effectiveness of inundation reduction in DTA1 is 81% and in DTA2 is 98.9%. The Budget Plan for rainwater harvesting varies depending on the capacity of rain barrels, ranging from Rp. 1, 492, 505.00 to Rp. 2, 692, 505.00. Gully plugs also vary in costs from Rp. 556, 000.00 to Rp. 808, 000.00, depending on the size of the gully plug. The first alternative is chosen by the combination of drainage rehabilitation, construction of a storage pond equipped with an automatic valve door, and rainwater harvesting. This is because the reduction effectiveness is greater and the rainwater harvesting maintenance is easier.
NOAA Satellite performance in estimating rainfall over the Island of Lombok
Authors: Saidah Humairo , Saptaningtyas Rini S , Hanifah Lilik , Jaya Negara IDG , Widyanty Desi 
Published: February 2020

Abstract
Rainfall data is the main input data for use in hydrological analysis, especially for planning purposes. Rainfall data is usually obtained from observations through rain stations. However, the availability of rainfall recording stations is sometimes very limited and located far from the project location. Water resource projects often face this obstacle. A technique is needed for estimating rainfall data using rain data from remote sensing through weather satellite data information providers. Since rainfall data from satellites is not the real amount of measured rainfall on the land, the rainfall data from the satellite must still be evaluated as to whether it can be directly used to represent the rainfall data of a region. The aim of this study is to evaluate the validity of NOAA CPC daily total precipitation data by comparing it to measured rainfall data and to analyse the lag time using the cross-correlation method. The results showed that the NOAA data has a lag time of +1 day over Lombok Island. The rain estimated by NOAA positively correlated with gauged rainfall on the next day. However, the performance of the NOAA data was very poor and for prediction purposes, the data still need to be calibrated.
Analysis of erosion and sedimentation in predicting the life time of the Cieunteung Retention Basin
Authors: Septianita Rieva , Yusuf Rakhmat , Mardiani  
Published: February 2020

Abstract
The high rates of erosion and sedimentation as the impacts of changes in land use cause the problem of sedimentation. The aim of this research is to analyse erosion and sedimentation in the Upper Citarum sub-basin, which will impact the life time of the Cieunteung retention basin. The SWAT model was used to simulate the hydrological process and erosion mechanism by using the formula of MUSLE. Based on the results of simulation data, the highest average erosion equalled 1, 094 tons/ha/year in 2013 while the lowest average erosion equalled 71.16 tons/ha/year in 2009. The results of SWAT model calibration in 2008-2018 were R2 = 0.89 and NS = 0.95, which means the model performance is categorized as very good. The simulation results showed the anticipative indicators of watershed disaster, as the erosion hazard index in terms of land cover and the coefficient of river regime in terms of water availability, have a very close relationship and positive correlation with the average of R2 = 0.8. The incoming sediment to the Cieunteung retention basin is 105, 418 ton/year or 72, 551.961 m3/year. By using sediment trap efficiency with a value of 4.37%, this research estimated that the dead storage capacity of 113, 670.3 m3 will be filled with sediments in 35.87 years. Furthermore, the long-term retention basin conservation effort by land terracing can reduce total sediments by 22% to 81, 948 tons in 2018, and thus the life time of the Cieunteung retention basin becomes 46.15 years.
Water management for agriculture development in peatlands
Authors: Budi Triadi L. 
Published: February 2020

Abstract
Peatlands are very vulnerable, and their existence must be maintained as stores of water and carbon stocks. Moreover, due to improper management, peatlands in Indonesia have degraded, resulting in various environmental problems such as fire, flooding, and subsidence. Drainage on peatlands that is not carried out properly causes the peat to dry out and even become vulnerable or flammable. The peat becoming dry on a large scale has the potential to increase subsidence and greenhouse gas emissions (such as CO2), which can contribute to local and global climate change. The management of peatlands in the cultivation area must pay attention to the unity of the peat area (landscape), including the existence of peat domes. The main parameters that need to be taken into account in land and water management in peat land are (1) Drainability Limits, (2) Subsidence, (3) Land Useful Life, (4) Adjacent Ecosystem Linkages, (5) Peatland Externalities, and (6) Priorities and Prevention of Massive and Disastrous Damage. Water management is one of the most important aspects in peatland management, which needs to be performed by water regulation so that the peat soil surface remains wet, preventing it from drought in the dry season and causing fires, and at the same time preventing flood disasters during the rainy season. Efforts to utilize excess water during the rainy season to cover the water deficit in the dry season need to be endeavoured to minimize wasted water.
Seismic Behaviour Modelling of Kualu Dam Under Earthquake Motion
Authors: Nur Cahya Evi , Rochman Taufiq , Marsudi Suwanto 
Published: February 2020

Abstract
As a mass structure, the seismic performance of a specified dam is importantly necessary, especially in the area which earthquake likely occur. The purpose of this study was to determine the critical areas of specified dam under earthquake motion. The dam structure was analyses with shell meshed modelling in empty condition and normal condition (operation term), as well as the seismic analysis under earthquake motion. The dynamic response analysis was carried out using response spectral acceleration under Operating Basis Earthquake (OBE) and Maximum Design Earthquake (MDE) based on earthquake records. According to the analytical results from the dynamic analyses, it was found that the shell structure members of the dam heel in the upstream were having a very large bending moment. The analysis also showed that the shell structure members in the face of downstream slopes were significantly responded the seismic motion in some certain modes. These two areas of the dam have become the critical areas of the dam which needed to be addressed in strength design of the specified dam.
Alternatives of flood control for the Linei river, city of Toboali (a case study of the Rawabangun region)
Authors: Faskal  , Sumiadi  , Primantyo Hendrawan Andre 
Published: February 2020

Abstract
Rawabangun is one of the areas in the City of Toboali in South Bangka Regency that is often flooded. There is a main river that passes through the Rawabangun area, which is the Linei River. The aim of this study is to analyse alternatives that can be used in flood control in Rawabangun. The analysis was carried out with the 5.1 Storm Water Management Model (SWMM) and 5-year planned rainfall. There were 9 overflow points found on the channel, and the implementation of flood control is to be carried out with infiltration wells, retention ponds, and channel modification. The application of infiltration wells with a maximum of 1267 units can eliminate 8 overflow points. The application of 3 units of retention ponds with a maximum of 3 units can eliminate 5 overflow points. Changing the channel depth to 4 m can eliminate all overflow points but is not relevant to be applied.
Sediment transport pre-measurement as revealed by the hydrophone monitoring technique at a volcanic river
Authors: Harsanto Puji , Ikhsan Jazaul , Legono Djoko , Pamudji Rahardjo Adam , Tsutsumi Daizo 
Published: February 2020

Abstract
Recognizing the real-time sediment transport phenomena of rivers in the Mt. Merapi area has become an important issue, particularly in the efforts to mitigate risks of lahar flow disasters. The development of a lahar-related monitoring system in the Mt. Merapi area has currently become more challenging since contact and direct lahar flow measurement is very risky. Former techniques for lahar flow occurrences such as cable sensor and video shooting are considered good enough in terms of identifying the occurrence, but not the intensity. Furthermore, after the cable is cut, re-installation often meets its practical limit. The hydrophone measurement technique seems to be an acceptable technique subject to sufficient field calibration. This paper reports the performance of a hydrophone equipment, which can be used for monitoring bedload transport with diameters greater than 4 mm.
Predicting flood hazards area using swat and hec-ras simulation in Bila river, South Sulawesi
Authors: Sholichin Moh , Qadri W. 
Published: February 2020

Abstract
Sidrap Regency is one of the special economic zones in South Sulawesi. It has been growing rapidly from rural land to an industrial city since mid-2005. With the process of urbanization, flooding has become a threat to the security of the city area. In this study, Bila River basin in Sidrap Region was selected to investigate the effect of urbanization on surface runoff and peak discharge. The methodology involved hydrology database building, a detailed Digital Elevation Model (DEM), a land use cover and a soil map of the basin. With all these data, the SWAT model (Soil and Water Assessment Tool) was used to predict discharge values. These discharge values were used, along with the DEM, to predict flood hazard areas in the Bila river basin floodplains. This procedure was made using the HEC-RAS model (Hydrological Engineering Centre-River Analysis System). The results of SWAT Model showed that changes in land use had a significant impact on increasing river discharge. The results of HEC-RAS show that with a planned flood of a return period of 10 years (840 m3/s) can cause flooding on Bila River, because the existing capacity for this river is 412.70 m3/s. The study shows the 2D capability of the new HEC-RAS 5 for flood inundation mapping and management studies.
The analysis of the causes of flood disasters and their impacts in the perspective of environmental law
Authors: Sholihah Qomariyatus , Kuncoro Wahyudi , Wahyuni Sri , Puni Suwandi Sisilia , Dwi Feditasari Elisa 
Published: February 2020

Abstrak
The environment is a combination of two things: resources and hazards. One of the hazards that is a result of environmental changes is the occurrence of natural disasters. Floods are one of the disasters that is feared by people in society. Negative impact of floods is the affected quality of raw water in the flooded area. Polluted water will certainly have a negative impact on the health of the human body. From the explanation above, this article analyzes changes in water quality that occur in flood-affected areas. The utilized method is the empirical legal method, by describing the state of the research subject based on existing conditions and in relation to existing legal regulations. The results obtained from this study showed that irresponsible individuals had committed many violations by building factories on the riverbanks. This causes the river water to overflow and damage buildings, dikes, settlements, and so on. The advice that can be given is to give strict sanctions to people who intentionally or unintentionally violate legal regulations, as well as to build cooperation between society and the government to conserve nature and foster self-awareness to preserve the environment.
Scenario of Vegetation Density for an Erosion Prediction Model
Authors: Sudarto  , Montarcih Limantara Lily , Dermawan Very , Suharyanto Agus 
Published: February 2020

Abstract
The aim of this study is to create a scenario for investigating the factors that affect the vegetation density and to design the formulation of vegetation density as one of the factors on the revised universal soil loss equation. The methodology consists of 1) measuring vegetation density in 10 watersheds/sub-watersheds by using satellite imagery and field observation; 2) studying the factors that influence vegetation density based on literature review; 3) determining the dominant factors that influence vegetation density based on statistical analysis; 4) formulating vegetation density based on the statistical analysis results; and 5) validating the formulation of vegetation density using the universal soil loss equation as the control. The result is expected to allow for prediction of the effect of reforestation on decreasing soil erosion.
Potential study of the liquefaction hazard at the reclamation development site of I Gusti Ngurah Rai airport, Nusa Dua region, province of Bali
Authors: Suprijanto Heri , Primantyo Hendrawan Andre , Wayan Bayu Nugraha Antonius 
Published: February 2020

Abstract
I Gusti Ngurah Rai Airport is an international airport in the Province of Bali with high traffic. The government of the province encouraged the airport services company to increase the airport’s capacity by expanding the aircraft apron. To initiate this project, land reclamation had been carried out on the west side of the existing apron. However, a sea wall was used for protecting the reclamation area from attack by waves. This case study of the reclamation area is intended to investigate its geotechnical aspect, in which the potential of liquefaction is necessary to be evaluated. The liquefaction is quantified by referring to CPT (cone penetration test) and SPT (standard penetration test) data. Analysis results of the reclamation area at location 1 (CPT testing) and location 2 (SPT testing) showed occurrences of the liquefaction hazard, where the FS (safety factor) was found to be less than 1. This means that soil improvements, such as utilizing a vibro-compaction method, are required. The steps of the vibration method are considered as the simplest method, particularly for compaction of sand material in the reclamation area. The criteria evaluation standard for the compaction is Dr (relative density) of greater than or equal to 70%.
Potentials of sago fibre hydrolysate (SFH) as a sole fermentation media for bioethanol production
Authors: Mohammad S , Awg-Adeni D S , Bujang K B , Vincent M , Baidurah S 
Published: February 2020

Abstract
Sago wastewater which contains starchy fibres from sago starch processing mills is commonly discharged directly to nearby stream thus contribute to serious environmental pollution. Sago fibre which is known to be a local agricultural waste mainly contains residual starch of about (50 – 60 %) together with cellulosic component. These contribute to high carbohydrate contents which suitable to be used as substrate for ethanol production. Initially, sago fibre (SF) was converted into sago fibre hydrolysate (SFH) via enzymatic hydrolysis using commercial enzymes; Liquozyme SC DS and Spirizyme Fuel HS. This study emphasized on batch ethanol fermentation by commercial baker’s yeast utilizing 50 g/L and 80 g/L glucose of SFH as the sole fermentation medium. The results indicate that 50 g/L glucose from SFH media is capable of generating maximum ethanol concentration at 20.33 ± 0.15 g/L, with highest glucose consumption efficiency (97.78 %) during 24 hours of fermentation. Similar concentration of bioethanol was obtained in 50 g/L glucose of commercial glucose (CG) media which is at 20.04 ± 0.06 g/L. However, lower ethanol concentration was obtained in both 80 g/L glucose from SFH (13.32 ± 0.12 g/L) and CG (12.98 ± 0. 04 g/L media), respectively. Addition of yeast extract at 3 g/L into 80 g/L SFH as well as CG significantly improve ethanol fermentability (SFH: 41.04 ± 0.04 g/L and CG: 33.96 ± 0.04 g/L). Based on statistical analyses, 50 g/L glucose of SFH media exhibit the highest ethanol yield (0.42 ± 0.003 g/g) and highest fermentation efficiency (81.35 ± 0.572 %) compared to 80 g/L glucose (0.24 ± 0.008 g/g; 46.65 ± 1.50 %). Conclusively, this study demonstrated that glucose in SFH was metabolized efficiently by commercial baker’s yeast during ethanol fermentation, thus suggesting the capability of SFH to be a feasible and alternative substrate with less expensive nitrogen source for the renewable bioethanol production.