Composite Groundwater Suitability Index (CGSI) Dataset for the Central Asian Arid Region

The Composite Groundwater Suitability Index (CGSI) is constructed by integrating groundwater recharge, lithology, and topographic factors and is calculated based on downscaled Groundwater Storage Anomaly (GWSA) data, which is derived from GRACE (Gravity Recovery and Climate Experiment) observations. The CGSI is determined using the following equation:CGSI = 0.15×Topographic Suitability + 0.20×Lithological Suitability + 0.30×Groundwater Recharge + 0.35×GWSA复合地下水适宜性指数（Composite Groundwater Suitability Index，CGSI）通过整合地下水补给量、岩性与地形因子构建而成，其计算基于由重力恢复与气候实验（Gravity Recovery and Climate Experiment，GRACE）观测数据推导得到的降尺度地下水储量异常（Groundwater Storage Anomaly, GWSA）数据。该指数通过以下公式计算：CGSI = 0.15×地形适宜性 + 0.20×岩性适宜性 + 0.30×地下水补给量 + 0.35×GWSA