Application of geospatial modelling technique in delineation of fluoride contamination zones within Dwarka Basin, Birbhum, India

作     者：Raju Thapa Srimanta Gupta D.V.Reddy 

作者机构：Department of Environmental Science The University of Burdwan Burdwan 713104 West Bengal India CSIR-National Geophysical Research Institute Hyderabad 500007 Telangana India 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2017年第8卷第5期

页      面：1105-1114页

核心收录：

学科分类：08[工学] 0708[理学-地球物理学] 0815[工学-水利工程] 0704[理学-天文学] 

基　　金：the DST (project No.SB/ES-687/2013 dated 11.11.2014), India for assisting with the financial support Central Ground Water Board Survey of India Geological Survey of India for their help and support 

主　　题：Fluoride Groundwater Weighted overlay method Potential fluoride contamination zone Dwarka Basin India 

摘      要：Dwarka River Basin is one of the fluoride affected river basin in Birbhum, West Bengal. In the present research work, various controlling factors for fluoride contamination in groundwater i.e., geology, aquifer type, groundwater table, soil, rainfall, geomorphology, drainage density, land use land cover, lineament and fault density, slope and elevation were considered to delineate the potential fluoride contamination zones within Dwarka River Basin in Birbhum. Assigning weights and ranks to various inputs factor class and their sub-class respectively was carried out on the basis of knowledge driven method. Weighted overlay analysis was carried out to generate the final potential fluoride contamination zones which are classified into two broad classes i.e., high and low , and it is observed that major portion of the study area falls under low fluoride contamination category encompassing 88.61% of the total area which accounts for 759.48 km^2 and high fluoride contaminated region accounts for 11.40% of the total study area encompassing an area of about 97.67 km^2. Majority of high fluoride areas fall along the flood plain of Dwarka River Basin. Finally, for validation 197 reported points within Dwarka having fluoride in underground water are overlaid and an overall accuracy of 92.15% is observed. An accuracy of 83.21% and84.24% is obtained for success and prediction rate curve respectively.