bluuebunny/crossref_metadata_2025_split huggingface dataset:
Geologic Hazard Forecasting Model Application in a HPP Based on Prototype Monitoring
Authors: Ling Qi , Yang Chongxiang , Hu Bo , Zhang Xuan 
Published: December 2019

Abstract
Based on geological hazard monitoring data at dam site of a HPP, slope and debris flow forecasting models of short term are studied practically. An advanced gray model is proposed for dangerous rock mass sloping disaster and tested with displacement monitoring data at high slope. A critical rainfall model and a storm intensity index are used to evaluate risk of single debris flow at dam site. The hazard forecasting conclusion might be generated by means of comprehensive analysis with the models and key monitoring indexes, so as to promote reliability and timeliness of the forecasting results.
A Comparative Study on the Ecological Sustainable Development of Traditional Settlements——A Case Study in Yunnan, China
Authors: Rongbin Yang , Dayu Yang 
Published: December 2019

Abstract
Settlements are the spatial forms of human habitation. Due to the unique natural environment, climate conditions and diverse ethnic cultures, Yunnan province has formed many traditional settlements with different characteristics. Nayun Ancient Town, Xizhou and Chengzi Ancient Villages in Yunnan are the research objects in this paper. By using methods such as data collection and field research, this paper analyzes the characteristics of these traditional settlements. Furthermore, this paper discusses the ecological constituent elements and characteristics in traditional settlements of Dai, Bai and Yi ethnic groups in Yunnan. The article analyzes the ecosystem, the mechanism of ecological balance regulation and the sustainable development of ecosystem in traditional settlement. Ultimately, this paper proposes the strategy of respecting the natural ecosystem and building artificial ecosystem scientifically, using ecosystem balance regulatory mechanism reasonably and building a sustainable development ecosystem in traditional settlements. It attempts to provide some useful theoretical thinking on the preservation, renewal and cultural heritage of traditional settlements.
Research on Seismic Assessment of Gravity Dam Based on Performance Analysis
Authors: Zheng Xiaodong , Hao Jianguo 
Published: December 2019

Abstract
Based on the incremental dynamic analysis method, a new index (the ratio of plastic energy consumption to total deformation energy) for evaluating the seismic performance of earthquake-resistant dams is proposed. Suggestions for three levels of earthquake damage and failure classification in two extreme states of gravity dam seismic performance evaluation are given. The IDA analysis of the concrete gravity dam was carried out by nonlinear numerical analysis model. Based on this, the quantile analysis and fragility analysis were carried out. The results show that ①the peak ground acceleration PGA of each limit state in the IDA curve of the quantile analysis is larger than the peak ground acceleration of the designed earthquake, which satisfies the level of functional support and safety assurance of the gravity dam. ②Under the fragility analysis, the probability of 65.92% is in the normal use stage of the 1.5 times design earthquake, and 100% can guarantee safety. The results show that the gravity dam has good seismic performance. The results of this study provide new ideas for the seismic performance design and safety risk assessment of gravity dams.
Three-dimensional Simulation Analysis of Overflow Section of Slurry Stone Wide-slit Gravity Dam
Authors: Dai Chunhua , Zheng Hanzhong , Xu Xiaochen , Li Dan , Li Hongqiang 
Published: December 2019

Abstract
The structure of the slurry stone wide-silt gravity dam is complicated. It is difficult to find out the true stresses and strains of its overflow dam section by material mechanics. The finite element method is adopted to analyze the stresses and strains of the wide-slit overflow dam section before and after reinforcement implementation. And comparative analysis of stress and strain changes before and after reinforcement. Provide an effective basis for dam reinforcement design[1][2].
Research on the technical method of constructing the evaluation system of geological cultural village
Authors: Chen Ru , Liao Qipeng 
Published: December 2019

Abstract
The current rural construction presents a new situation in which multiple perspectives are involved. As one of the important cut-in points for intervention, the academic community has begun to explore and practice the rural construction model based on “geological culture”. Starting from the ontology of rural geological environment resources, the four-dimensional attributes including geological relics, agricultural geological resources, human landscapes and natural landscapes are concerned, and the evaluation method of geological culture village based on analytic hierarchy process (AHP) is discussed. Through the comprehensive evaluation index system of geological culture villages with two basic connotations of environmental resources, development conditions and development benefits, seven types of geological relics, agricultural geological resources, human landscape, natural landscape, human settlement environment, public service and development benefit are proposed. The second-level index consists of a total of 16 third-level indicators of the comprehensive evaluation system of geological culture villages. The article aims to lay a foundation for the planning and design of geological and cultural villages through the construction of the evaluation system and promote the healthy and sustainable development of the geological culture villages.
Preparation and Photocatalytic Properties of Ce/g-C3N4 Co-doped TiO2 Nanomaterials
Authors: Xie Zhouyun , Zhang Ni , Yu Xucheng , Xu Yiyi , Lu Jingjing , Tang Li , Xia Jingfen , Yang Guojing 
Published: December 2019

Abstract
A Ce/TiO2/g-C3N4 composite material was prepared by sol-gel method using g-C3N4 as support and Ce(NH4)2(NO3)6 as dopant. The structural and morphological characterization of the samples was detected by TEM, XRD, FTIR, UV-Vis. RhB was selected as the target pollutant, the photocatalytic and renewable properties of the samples driven by visible light were evaluated. The results showed that Ce/TiO2/g-C3N4 had excellent heterojunction structure. The ternary components cooperate with each other to show excellent photocatalytic performance for RhB solution with molar concentration of 0.5×10−5mol·L−1 under the condition of dosage of 20.0mg, pH 5.0 and visible light-driven 180min. The degradation rate of RhB was 99.3% better than that of g-C3N4, TiO2 and Ce/TiO2. Cyclic degradation experiments indicated that the Ce/TiO2/g-C3N4 had high photocatalysis stability and reusability. Active group capture experiments revealed that ·O2
- was the main active species in the photocatalytic degradation of RhB over Ce/TiO2/g-C3N4, and the corresponding contribution rate of ·O2
- was 84.1%.
Application of UAV and ArcGIS in Soil and Water Conservation Monitoring of slag area—Taking a slag area of hydroelectric power station in Dadu River as an example
Authors: Zhang Junwei , Yi Zhongqiang , Zhou Chao , Chang Li , Chen Fan , Zhao ZaiXing , Gao Guoqing 
Published: December 2019

Abstract
In the process of slag area in hydropower projects, the ground will be disturbed strongly, and a large amount of spoil slag will be generated, resulting in serious soil erosion. Therefore, the monitoring of soil and water conservation in the slag area of hydropower projects is particularly important. Tradition al ground monitoring cannot fully meet the needs of current monitoring work. UAV technology is more efficient than traditional technology,. Through periodic aerial photography and post-modeling, combining with ArcGIS, provides enhanced data analysis support for UAV data analysis. Taking the 1# slag yard of a hydropower station in Dadu River as an example, this paper discusses the applicability of UAV and ArcGIS technology in soil and water conservation monitoring of large hydropower project slag area. The effective way of maintaining information, while improving the monitoring efficiency of soil and water conservation, can ensure that the monitoring data and the Soil erosion error control are within 10%, making up for the traditional technical ways that is insufficient in the monitoring of soil and water conservation in the large-scale hydropower project slag yard.
In recent years, the state has paid more and more attention to the construction of ecological civilization. As an important part of ecological civilization construction, soil and water conservation work has become more and more important. As an important part of soil and water conservation work, soil and water conservation monitoring is the basis for ecological restoration and comprehensive management of soil and water conservation, and is a powerful guarantee for national ecological construction decision-making [1]. In recent years, the application of remote sensing technology for UAVs is for production and construction. The project of soil and water conservation monitoring work provides a new technical way [2-4]. UAV operation has high automation and precision, and it is targeted. Some models have reached the application-level standards, and with the rapid progress of software and hardware technology, it is greatly improving the post-processing applicability of aerial image data, making drones widely used in aerial photography, agriculture, plant protection and monitoring. Torres-Sánchez et al [5], Francisco et al [6] use low-altitude high-resolution drone remote sensing imagery to carry out on precision agriculture and agricultural pest control. Mitch Bryson et al. [7] used low-altitude visible drone images to study vegetation type classification based on vegetation color and texture characteristics. Sebastian d’Oleire—Oltmanns et al. [8] used high-altitude drone aerial imagery to complete the monitoring of soil erosion in Morocco, providing a reference for soil and water.
Study on the Stretching Mechanism of the lower Reach of the Distribution Estuary of Alluvial River after Lateral bypass flow-Taking Jingjiang Reach of the Yangtze River as an Example
Authors: Qu Geng , Zhao Zhanchao , Zheng Chengtai 
Published: December 2019

Abstract
After diversion, alluvial rivers tend to widen in local areas downstream of diversion ports. The flow is dispersed and the main stream changes in a year are complex, which has a great impact on flood control, navigation and water intake. Taking the Jingjiang reach in the middle reaches of the Yangtze River as an example, according to its historical development, this paper describes the variation of the river regime in the downstream of the diversion ports. Based on the analysis of a large number of measured water and sediment data and the boundary conditions of Jingjiang reach, the characteristics of flow movement in the diversion port reach are studied by combining the solid model test. It is found that after river diversion, the distributary morphology of water flows along the river section changes, and the mainstream develops from concentration to dispersion, and the flow of river diversion will change with the variation of channel flow. Generally speaking, in dry season, because of the small diversion volume, the main stream downstream of the diversion port is far from the diversion port, while in flood season, the diversion volume increases, and the main stream affected by the suction of the diversion port is often close to the diversion port, which causes frequent changes of the main stream downstream of the diversion port in the year. In addition, when the mainstream develops from centralization to dispersion, the riverbank will be eroded by water flow, and the mechanical properties of the riverbank soil will change, and the riverbank gradually loses stability and subsequently collapses. The main reason for the widening in the lower reaches of the diversion estuary is a comprehensive effect due to the changes of the distributary morphology and the main stream position caused by the diversion and the geological conditions of the channel.
The Preliminary Study on the Strategy of Ecological Coast Restoration——Illustrated by the case of the Ecological Restoration of Lingni Old Seawall in Wenzhou City, Zhejiang Province
Authors: Chaoyu Xie , Wenfei Peng , Yangchang  
Published: December 2019

Abstract
The eco-coastal restoration has been a hot issue in recent years, however a complete theoretical and methodological system has not been formed yet. Taking the ecological restoration project of Lingni old Seawall in Wenzhou City, Zhejiang Province as an instance, this paper illustrates the status quo of the project, and elaborates on the three steps of site arrangement, environmental restoration and cultural renewal, which embodies the idea of ecological restoration for this type of coastal space. On this basis, three principles of reality-based, nature-rooted and culture-oriented are put forward. It is hoped that in future related projects and coastal space restoration, the nature will be respected in combination with culture, and municipal infrastructure construction, landscape infrastructure construction and ecological infrastructure construction will be closely coordinated, so as to establish a coastal landscape system with multi-sense ecology in line with the principle of utilizing the sea ecologically.
Study on Optimization of Support of Whole Coal Roadway Using Numerical Simulation
Authors: Nian Liu Yan , Yong Zhao Xiao , Hang Peng Qi 
Published: December 2019

Abstract
Roadway is a necessary channel for mining, and smooth and stable roadways are the guarantee for safe and efficient mining. Due to the diversity of roadway support modes and support parameters, this paper aims to analyze the influence of different support modes and different support parameters on the whole coal roadway using numerical simulation method.
Analysis of urban flood prevention emergency plan in Pinghu City
Authors: Wang Lirong , Yan Bin , Ma Xiaobing 
Published: December 2019

Abstract
With the acceleration of urbanization in China, urban flood disasters have gradually become a prominent type of urban disease, seriously affected the normal production and life of urban residents, and brought great challenges to urban flood control and disaster reduction work. Based on the current situation of urban flood control in Pinghu City and the latest Guidelines for the Compilation of Urban Flood Control Emergency Preparedness Plan, this paper analyses the scope of application, key defense objects and key points of urban flood control in Pinghu City, and puts forward the organizational system and responsibilities of urban flood control, preventive and early warning measures, emergency response actions, public defense guidelines, personnel transfer and placement, etc. Specific non-engineering measures for urban flood control are put forward for Pinghu City.
Preliminary study on the erosion impact of breach floods based on numerical simulation and physical model test
Authors: Liu Xinyuan , Chen Dong , Qu Geng , Zhang Hui 
Published: December 2019

Abstract
This paper established the combination model of numerical simulation and physical model test to fully demonstrate the influence of dike-breach floods on the pipeline. Numerical models were used to analyze the effects of different flooding schemes with different breach locations and different breach widths on the engineering line. The results show that the large flow velocity is mainly distributed in the vicinity of the breach for each scheme, and the influence is most serious when the breach occurs near the pipeline. Comparing the floods of different magnitudes comprehensively, the greater is the flood magnitude, the more serious is the influence on the pipeline. As the breach width increases, most of results show some characteristics, such as the decrease of the maximum flow velocity at the breach, the increase of the maximum flow velocity in other areas of the pipeline, the increase of the maximum flow velocity contour range, and the decrease of the large flow velocity duration. The plane and range of the scouring pit were obtained by physical model test. Considering results of numerical and physical model comprehensively, the protection ranges of different grades along the project were determined according to different ranges of impact velocities and scouring pits. The research results can provide reference for the protection of the pipeline in the Jiahetao area.
Modification of the Xin’anjiang Model for Flood Forecasting in Karst Area, Southwestern China
Authors: Jiang Rucheng , Gu Shixiang , Zhou Mi 
Published: December 2019

Abstract
Hydrological modeling of a karst environment is challenging because of the characteristically thin soil and low soil water retention capacity. The purpose of this study was to simulate floods in a complex karstic river basin that comprised a large karst depression, high mountainous karstic areas, springs, and downstream karst areas. In such an environment, deterministic models (e.g., SWAT) are unable to compute the additional contribution from the subsurface. In this paper, a modified Xin’anjiang model was proposed and a specific method was presented for characterizing the karst aquifers flow systems by calibrating parameters from a spring hydrograph analysis. The simulated results indicated that the karst depression, as a storage element, provides a considerable buffer to the effects of a rainstorm. The application of the modified Xin’anjiang model demonstrated its applicability to the karst regions in southwestern China. Thus, it can provide better understanding of such hydrological systems and offer an improved basis for their future hydrological management.
Visualization Analysis for Tunnel Researches Based on CiteSpace
Authors: Li Gong , Zhonghui Wang , Yingdi Qi , Yiqun Yang , Hong Wang 
Published: December 2019

Abstract
In order to find out the history, present situation and hot trend of tunnel research, this article is based on the literature data of tunnel study from 1997 to 2017 in CNKI database, using CiteSpace visual econometric analysis software to co-occurrence analysis and keyword co-word analysis and processing by citation data of authors and research institutions. The results showed that there is close cooperation among the authors of the main research groups, haveing a good cooperative relationship chain among the research institutions, and the keywords of hot research are diversion tunnel, deep buried tunnel, numerical simulation, water conveyance tunnel, lining, rock burst, rock mechanics, surrounding rock, river diversion tunnel, TBM and so on.
Analyzing the algal bloom risk and its relationship with environmental variables in urban landscape water
Authors: Luo Kun , Wu Conglin , Zheng HeZhen , Hu Xuebin , He Qiang 
Published: December 2019

Abstract
Longjing Lake is an urban landscape lake located in the Chongqing Expo Garden, Chongqing City, China. In order to assess the lake condition for eutrophication, the water quality and phytoplankton community in Longjing Lake was investigated monthly in 2016. A total of 53 genera of phytoplankton belonging to eight phyla were identified. The dominant organisms included Pseudanabaena, Ankistrodesmus and Cryptomonas, with Pseudanabaena being the most dominant, (dominance value = 0.7163). One-way ANOVA showed significantly larger Pseudanabaena abundance but lower biotic indices (Shannon-Wiener index (H), richness index (Dm), evenness index (J) and Simpson diversity index (D)) in June through September compared to other months (p < 0.05). A stepwise discriminant function analysis was employed to develop predictive model for assessing the level of algal bloom risk. The input variables for the model included water temperature (T), chemical oxygen demand (COD) and dissolved oxygen (DO). By measuring the values of T, DO, and COD concentrations, thus, lake managers could understand the temporal variation in phytoplankton biomass, and analyze the risk of algal bloom. Since the model developed in this study use only three easy-to-measure variables, its application can help in rapid assessment of algal bloom risk.
Exploring spatial and temporal distributions of air quality in China from 2013 to 2017
Authors: Liu Yan , Suo Liming 
Published: December 2019

Abstract
In recent years, severe and persistent air pollution episodes in China have drawn wide public concern. It is necessary to analyse and evaluate the current status of air quality of China, which is significant for sustainable urbanization and environment protection. In this study, we investigate the air quality of the key 74 cities in China from 2013 to 2017 based on the data from the Ministry of Environmental Protection of the People’s Republic of China. With the use of ArcGIS and Stata, we identify the spatial correlation and agglomeration of the air quality. The significant value of Moran’s I test shows positive autocorrelation between the cities and verifies the spatial spill over effect of the air pollution. From the temporal dimension, we find the seasonal variations and an overall better-off trend of air quality. This improvement over the past year benefits from the strict regulations and governance from both central and local government. Our research provides an updated measurement and detailed illustration of the air condition in China. With the exploration of spatial and temporal distributions of air quality, the research findings facilitate the future governance and guidelines for sustainable environmental development.
Alternative methods for reforestation and land rehabilitation to reduce the plastics waste in forest areas
Authors: Holbert J , Sudrajat D J , Nurhasybi  , Yulianti  
Published: December 2019

AbstractThe accumulation of mismanaged plastic waste in the environment is a serious problem in Indonesia and become a global growing concern. Implementation of mitigation policies to reduce the use of plastics is very urgent, including in reforestation and land rehabilitation programs revealed by many plastics (polybags) used in seedling production for forest planting. Reducing the plastic waste in the planted forest areas can apply some alternative methods that were applied in several regions, such as direct seeding, bare-root seedling and bio-pot seedling. In this paper, application of several methods would be assessed as alternative methods for reforestation and land rehabilitation. Bio-pot seedlings had the highest growth performances in nursery and field test for several tree species, followed by polybag seedling, and direct seeding using seed briquette. However, seedling grown from direct seeding using seed briquette tended to have better root formation, especially in tap root length, tap root biomass and bellow-ground biomass. Direct seeding was estimated twice lower compared to transplanting using polybag or bio-pot seedlings. Furthermore, use of bio-pot seedlings was more effective in rapidly growth and establishing canopy. Direct seeding using seed briquette was a promising alternative technique for land rehabilitation and reforestation, especially for remote areas.