Evolution of the Recharge and Discharge of Groundwater in Plain Area of the Hami Basin from 1959 to 2021
摘要
Groundwater serves crucial roles in resource preservation, ecological maintenance, and geological security in addition to being a significant component of water supplies. This work meticulously summarized data on the growth and consumption of water resources, hydrogeological survey, and groundwater inquiry and evaluation since 1959 to 2021 to estimate the evolution of the recharge, discharge, and storage of groundwater in the Hami Basin. The results suggest that: 1) Human activities primarily influenced the evolution of the groundwater recharge and discharge factor in the Hami Basin, and the abrupt changes in recharge and discharge were consistent with the implementation of policies such as reform and opening up and western development, which is a key factor in controlling human activities; 2) Total groundwater recharge fell from 8.22 × 108 m3/a in 1959 to 4.08 × 108 m3/a in 2021. The discharge of groundwater has reduced from 8.21 × 108 in 1959 to 5.67 × 108 m3/a in 2021; and 3) The equilibrium between groundwater recharge and discharge was disrupted in 1975, and ever since then, the discharge has always been greater than the recharge, indicating a negative equilibrium state. The total amount of storage over the last 45 years was –71.3 × 108 m3.