Application of remote sensing fuzzy assessment method in groundwater potential in Wailingding Island

To solve the problems related to the assessment of groundwater potential in small-scale areas or small arid bedrock island areas in the field of groundwater potential assessment via remote sensing technology based on fuzzy assessment methodology, we used maps, DEM data, GF-1 satellite data, and so on, employing Wailingding Island in the Pearl River estuary as the study area. Then, we used a lithology index, relief index, slope index, vegetation fraction index, land temperature index, water density index, and soil humidity index as extraction indices. Next, we assessed the groundwater potential of this island. We obtained the results of the level charts of groundwater potential assessment in this area based on the RS fuzzy assessment method. The results were verified according to the water flow rate of the wells. Finally, we determined the distribution of groundwater in the area. This study is significant for guiding the exploitation and utilization of groundwater in small islands.