“…3 A). It was determined that barren and agricultural lands are the most appropriate sites for the RWH [ 18 , 29 ], comprising approximately 65% of the total study area, thus were given a high rank of consideration ( Table 4 ). Fig.…”
Section: Resultsmentioning
confidence: 99%
“…3 D. The CN map has been classified into five categories based on its suitability for RWH: Unsuitable (<37), Low (37–61), Medium (61–70), Suitable (70–80), and Very Suitable (>80). An increased CN value is indicative of an increased rate of surface runoff, thus suggesting a greater potential for the RWH [ 19 , 29 ].…”
“…3 A). It was determined that barren and agricultural lands are the most appropriate sites for the RWH [ 18 , 29 ], comprising approximately 65% of the total study area, thus were given a high rank of consideration ( Table 4 ). Fig.…”
Section: Resultsmentioning
confidence: 99%
“…3 D. The CN map has been classified into five categories based on its suitability for RWH: Unsuitable (<37), Low (37–61), Medium (61–70), Suitable (70–80), and Very Suitable (>80). An increased CN value is indicative of an increased rate of surface runoff, thus suggesting a greater potential for the RWH [ 19 , 29 ].…”
“…Indigenous RWH techniques have been developed to cope with different challenges of water shortages, for example, in Jordan, Palestine, Syria, Saudi Arabia, Tunisia, and Iraq [9][10][11]. Rajasthan in India also has many local RWH practices suitable for dry to arid climatic regions.…”
Rainwater harvesting (RWH) has the potential to enhance the sustainability of ground and surface water to meet increasing water demands and constrained supplies, even under a changing climate. Since arid and semi-arid regions frequently experience highly variable spatiotemporal rainfall patterns, rural communities have developed indigenous RWH techniques to capture and store rainwater for multiple uses. However, selecting appropriate sites for RWH, especially across large regions, remains challenging since the data required to evaluate suitability using critical criteria are often lacking. This study aimed to identify the essential criteria and develop a methodology to select potential RWH sites in Rajasthan (India). We combined GIS modeling (multicriteria decision analysis) with applied remote sensing techniques as it has the potential to assess land suitability for RWH. As assessment criteria, spatial datasets relating to land use/cover, rainfall, slope, soil texture, NDVI, and drainage density were considered. Later, weights were assigned to each criterion based on their relative importance to the RWH system, evidence from published literature, local expert advice, and field visits. GIS analyses were used to create RWH suitability maps (high, moderate, and unsuited maps). The sensitivity analysis was also carried out for identified weights to check the inadequacy and inconsistency among preferences. It was estimated that 3.6%, 8.2%, and 27.3% of the study area were highly, moderately, and unsuitable, respectively, for Chauka implementation. Further, sensitivity analysis results show that LULC is highly sensitive and NDVI is the least sensitive parameter in the selected study region, which suggests that changing the weight of these parameters is more likely to decide the outcome. Overall, this study shows the applicability of the GIS-based MCDA approach for up-scaling the traditional RWH systems and its suitability in other regions with similar field conditions, where RWH offers the potential to increase water resource availability and reliability to support rural communities and livelihoods.
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