Assessing the suitability of a reservoir site in a water-stressed area in Purulia, India, using AHP-TOPSIS

摘要

Abstract In emerging and poor nations, water scarcity and related problems are surging, and they are getting worse due to unfavourable geo-climatic conditions. Two years from the prior body of literature were used in this study: one is a drought year (2010) and the other is a normal year (2017). Weighted overlay analysis has been performed to pinpoint the best location for the construction of the water reservoirs. Five key variables were selected to achieve the goal: distance from the settlement, drainage network, land use and land cover, slope, and lastly soil texture of the study region. The weighted sum of the individual parameters was determined using the AHP approach. 32 existing minor irrigation dam locations were used to evaluate the model of site appropriateness for water reservoirs. The model has been validated by the ROC curve technique where the Area under curve (AUC) value is 0.77. So the value of AUC indicates the model acceptance. The overall suitability of the Community development block has been determined using the TOPSIS approach. The Kashipur block has gained the top spot in terms of total potentiality, according to the PI value, while the Bundwan block is in last place with a rating of 6. Hura, Puncha, and Barabazar have managed to secure second position after Kashipur Block in terms of total potential. Purulia-II, Manbazar-I, Purulia-I, Para are found in third and fourth positions, respectively. The Bundwan block is the initial requirement zone for the construction of a water reservoir, according to this study, which also attempted to establish a model of the water reservoirs requirement zone in relation to the crop water shortage index and applied to assess the total requirement zone. Neturia, Santuri, Jhalda, and Manbazar-II are the necessary blocks for the second stage. The next stage required zone includes Raghunathpur-II, Raghunathpur-I, Jaypur, Jhalda-I, Baghmundi, and Balarampur. The outcome also shows that Kashipur and Barabazar CD Blocks do not have as much need for water reservoirs for irrigation. This model will help to improve the government's initiative and also make it easier in the future to build water reservoirs.