疏勒河流域花海灌区地下水位动态演变趋势

根据疏勒河流域花海灌区水文地质条件,尤其是地下水的补径排关系,建立了相应的水文地质模型和地下水数值模型。通过拟合近十年的地下水水位,对模型进行识别与校验,在此基础上预测了未来20年地下水水位变化趋势及影响因素。结果表明,在350.52万m~3/a的开采强度下地下水水位略有回升,在2 009.86万m~3/a的开采强度下地下水水位下降明显,最大降幅达6 m;高强度开采地下水会引起灌区地下水水位持续下降,区内东南部受影响尤为明显,会引起一系列生态及环境问题。

Trend analysis of dynamic change of groundwater level in Huahai irrigation area of Shule River Basin

Based on the hydrogeological conditions of the Huahai irrigation area in the Shule River Basin, and focusing on the relationships between groundwater recharge, runoff, and discharge, a hydrogeological model and a groundwater numerical model were established. The models were identified and calibrated through fitting of the groundwater levels over the past ten years. On this basis, the trend of groundwater level changes in the forthcoming 20 years and the influencing factors were predicted. According to the results, the groundwater level slightly increases under an exploitation intensity of 3. 505 2 million cubic meters per year, and significantly decreases under an exploitation intensity of 20. 098 6 million cubic meters per year, with the greatest decreased level being six meters. Intense exploitation of groundwater can lead to the continuous decline of the groundwater level in the irrigation area. The southeastern part of the study area in particular will be significantly affected, which will cause a series of ecological and environmental problems.