Rihand reservoir is continuously experiencing siltation due to erosion in upper basin; thus study of morphometric-based prioritization of sub-watershed has become prerequisite for implementation of measures for conservation of soil and water resource. In present study an attempted has been made to analyze characterization and prioritization of sub-watersheds in upper basin of Rihand watershed based on hydro-morphometric parameters, in an environment of Geographical Information System (GIS), with the help of Multicriteria Decision Making through Fuzzy Analytical Hierarchy Process (FAHP) techniques in order to identify critical sub-watersheds for conservation and management of soil and water resource. The morphometric characterization has been done through measurement of linear, areal and relief aspect of over seven sub-watersheds using SOI topographical sheet and SRTM data with the help of Q GIS 3.10 and White box software. In the purpose prioritization of sub-watersheds FAHP method has been implemented through assigning fuzzy membership function to each of 15 morphometric parameters by deriving their relationships with erosional hazard and criterion weight has been obtained using Saaty’s (Fundamentals of decision making and priority theory with analytical hierarchical process, RWS Publications University of Pittsburgh, Pittusburgh, 1980) proposed method. Based on prioritization approach the entire sub-watershed has divided into 3 vulnerable zones, i.e., high, medium and low. This study reveals that about 29% area of the watershed is falls under high vulnerable zone as they obtained high priority value and required immediate measures. In addition, ideal locations for measure structure to prevent soil erosion and maximize infiltration has been proposed which will be useful to the decision maker for land and water resource conservation, management, and sustainable agricultural development.

由于上流域的侵蚀，Rihand水库不断发生淤积。因此，基于形态计量学的流域划分优先次序研究成为实施水土保持措施的前提。在本研究中，已经尝试在地理信息系统（GIS）的环境下，借助模糊多准则决策，基于水文形态参数来分析Rihand流域上流域子流域的特征和优先级。层次分析法（FAHP）技术，以识别用于保护和管理水土资源的关键子流域。形态计量学表征是通过测量线性，在Q GIS 3.10和White box软件的帮助下，使用SOI地形图和SRTM数据对七个子流域的面积和地形进行了研究。为了对子流域进行优先排序，通过推导15个形态参数与侵蚀危险之间的关系，为每个形态参数分配模糊隶属度函数，从而实现了FAHP方法，并使用Saaty的方法获得了标准权重（决策基础和优先级理论以及层次分析法过程，RWS Publications University of Pittsburgh，Pittusburgh，1980）提出了方法。基于优先级排序方法，整个子流域划分为3个脆弱区域，即高，中和低。这项研究表明，流域约29％的地区属于高脆弱区，因为他们获得了较高的优先权并需要立即采取措施。另外，已经提出了用于防止土壤侵蚀和最大程度地渗透的措施结构的理想位置，这将对土地和水资源保护，管理和可持续农业发展的决策者有用。