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Modelling soil erosion risk of a tropical plateau basin to identify priority areas for conservation
Environmental Earth Sciences ( IF 2.8 ) Pub Date : 2021-09-17 , DOI: 10.1007/s12665-021-09941-8
Sudipa Halder 1 , Pankaj Kumar Roy 1 , Malabika Biswas Roy 2
Affiliation  

Soil erosion induced by physical and anthropogenic activities needs serious concern to deal with. In recent days, watersheds have been facing acute soil loss because of deforestation, poor land use management and unscientific agricultural practices. The present paper highlights the goal to decipher soil erosion-susceptible zones in a rain-fed river basin of India having a complex topography comprising the extension of Chotonagpur plateau and parts of Bengal basin. Fuzzy logic algorithm-based analytical hierarchy process (FAHP) with remote sensing and geographical information system (GIS) were used to execute the objective. The soil erosion-susceptible zone (SESZ) was identified assimilating the 14 geo-environmental, hydro-meteorological and anthropogenic conditioning factors such as slope, drainage density, relative relief, stream power index, topographic wetness index, runoff, soil texture, land use and land cover, rainfall erosivity factor, distance from road, distance from settlement, distance from river, geomorphology and soil bareness index based on which sub-basin prioritization for sustainable soil conservation was made. The soil erosion-susceptible zone was classified into five classes, namely very low soil erosion zone (13.20%), low soil erosion zone (25.75%), moderate soil erosion zone (27.62%), high soil erosion zone (21.90%) and very high soil erosion zone (11.53%). Receiver operating characteristics (ROC) curve was generated where area under the curve (AUC) came as 0.82 and a correspondence analysis between the SESZ and the first three ranked factors was also made which together proves the accuracy of the model.



中文翻译:

模拟热带高原盆地的土壤侵蚀风险以确定优先保护区域

由物理和人为活动引起的土壤侵蚀需要认真处理。最近几天,由于森林砍伐、土地​​利用管理不善和不科学的农业做法,流域面临着严重的土壤流失。本论文强调了破译印度雨养流域土壤侵蚀易感区的目标,该流域具有复杂的地形,包括 Chotonagpur 高原的延伸和孟加拉盆地的部分地区。使用基于模糊逻辑算法的层次分析法 (FAHP) 与遥感和地理信息系统 (GIS) 来执行目标。土壤侵蚀易感区 (SESZ) 是通过同化 14 个地质环境、水文气象和人为条件因素确定的,例如坡度、排水密度、相对地势、河流功率指数、地形湿度指数、径流、土壤质地、土地利用和土地覆盖、降雨侵蚀系数、与道路的距离、与聚居地的距离、与河流的距离、地貌和土壤裸露指数,根据哪个子流域优先考虑可持续土壤保持。土壤侵蚀易感区分为5类,即极低水土流失区(13.20%)、低水土流失区(25.75%)、中度水土流失区(27.62%)、高度水土流失区(21.90%)和非常高的土壤侵蚀区(11.53%)。生成受试者工作特征(ROC)曲线,曲线下面积(AUC)为 0.82,同时对 SESZ 与排名前三的因素进行对应分析,共同证明了模型的准确性。土地利用和土地覆盖、降雨侵蚀系数、与道路的距离、与定居点的距离、与河流的距离、地貌和土壤裸露指数,根据哪个子流域优先考虑可持续土壤保持。土壤侵蚀易感区分为5类,即极低水土流失区(13.20%)、低水土流失区(25.75%)、中度水土流失区(27.62%)、高度水土流失区(21.90%)和非常高的土壤侵蚀区(11.53%)。生成受试者工作特征(ROC)曲线,曲线下面积(AUC)为 0.82,同时对 SESZ 与排名前三的因素进行对应分析,共同证明了模型的准确性。土地利用和土地覆盖、降雨侵蚀系数、与道路的距离、与定居点的距离、与河流的距离、地貌和土壤裸露指数,根据哪个子流域优先考虑可持续土壤保持。土壤侵蚀易感区分为5类,即极低水土流失区(13.20%)、低水土流失区(25.75%)、中度水土流失区(27.62%)、高度水土流失区(21.90%)和非常高的土壤侵蚀区(11.53%)。生成受试者工作特征(ROC)曲线,曲线下面积(AUC)为 0.82,同时对 SESZ 与排名前三的因素进行对应分析,共同证明了模型的准确性。地貌和土壤裸露指数基于哪个子流域优先考虑可持续土壤保持。土壤侵蚀易感区分为5类,即极低水土流失区(13.20%)、低水土流失区(25.75%)、中度水土流失区(27.62%)、高度水土流失区(21.90%)和非常高的土壤侵蚀区(11.53%)。生成受试者工作特征(ROC)曲线,曲线下面积(AUC)为 0.82,同时对 SESZ 与排名前三的因素进行对应分析,共同证明了模型的准确性。地貌和土壤裸露指数基于哪个子流域优先考虑可持续土壤保持。土壤侵蚀易感区分为5类,即极低水土流失区(13.20%)、低水土流失区(25.75%)、中度水土流失区(27.62%)、高度水土流失区(21.90%)和非常高的土壤侵蚀区(11.53%)。生成受试者工作特征(ROC)曲线,曲线下面积(AUC)为 0.82,同时对 SESZ 与排名前三的因素进行对应分析,共同证明了模型的准确性。低水土流失区(25.75%)、中度水土流失区(27.62%)、高水土流失区(21.90%)和极高水土流失区(11.53%)。生成受试者工作特征(ROC)曲线,曲线下面积(AUC)为 0.82,同时对 SESZ 与排名前三的因素进行对应分析,共同证明了模型的准确性。低水土流失区(25.75%)、中度水土流失区(27.62%)、高水土流失区(21.90%)和极高水土流失区(11.53%)。生成受试者工作特征(ROC)曲线,曲线下面积(AUC)为 0.82,同时对 SESZ 与排名前三的因素进行对应分析,共同证明了模型的准确性。

更新日期:2021-09-17
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