基于遥感和GIS技术的无流域直接径流和土壤侵蚀估算潜在区域识别

IF 3.1 Q2 ENGINEERING, GEOLOGICAL International Journal of Engineering and Geosciences Pub Date : 2023-01-11 DOI:10.26833/ijeg.1115608
Manti Patil, A. Saha, S. Pingale, D. Rathore, V. Goyal
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引用次数: 1

摘要

对土壤和水资源进行调查对于确定水管理和水资源的未来情况以实现粮食和水安全至关重要。流域管理不当导致了大量的泥沙流失和地表径流。因此,本研究采用土壤保持服务曲线数法(SCS-CN)和修正通用土壤流失方程(RUSLE)分别估算地表径流和土壤侵蚀。这些是利用地理空间技术对印度恰蒂斯加尔邦坎克尔地区未测量的曼德里河流域进行估计的。径流潜力区是由给定降水数量下该地区的不透水表面定义的,它是基于次流域水平的曲线数确定的。结果表明,16年的平均径流量为1437万立方米(mM3)。年平均土壤流失量为17.23吨/公顷/年。大部分被侵蚀的地区被发现在曼德里河排水系统的主要河流周围和流域地形的较高斜坡上。研究表明,地表径流和土壤侵蚀是影响该流域水土资源的主要问题。因此,可根据流域潜在径流带和水土流失严重程度,建设适宜的集水点和集水构筑物,实现流域水土保持。
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Identification of potential zones on the estimation of direct runoff and soil erosion for an ungauged watershed based on remote sensing and GIS techniques
An investigation of soil and water resources is essential to determine the future scenario of water management and water resources to attain food and water security. The improper management of watersheds results in a huge amount of sediment loss and surface runoff. Therefore, the present study was carried out to estimate the surface runoff and soil erosion using the Soil Conservation Service Curve Number (SCS-CN) method and Revised Universal Soil Loss Equation (RUSLE), respectively. These have been estimated using geospatial technologies for the ungauged Mandri river watershed from the Kanker district of Chhattisgarh State in India. The runoff potential zones, which are defined by the area's impermeable surfaces for a given quantity of precipitation were identified based on curve numbers at the sub-watershed levels. The results showed that the average volume of runoff generated throughout the 16-years period was 14.37 million cubic meters (mM3). While average annual soil loss was found to be 17.23 tons/ha/year. Most of the eroded area was found to be around the major stream in a drainage system of Mandri River and on higher slopes of the terrain in the watershed. This study revealed that surface runoff and soil erosion are primary issues, which adversely affected the soil and water resources in this watershed. Therefore, suitable water harvesting sites and structures can be constructed based on the potential runoff zone and severity of soil erosion to conserve the soil and water in the watershed.
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CiteScore
4.00
自引率
0.00%
发文量
12
审稿时长
30 weeks
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