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为合理利用灌区地表水和地下水资源,改善灌区生态环境,以人民胜利渠灌区为例,在对灌区地下水开发利用现状及其水位动态进行分析的基础上,将地下水模拟模型与GIS技术进行结合,并设置8个情景方案,预报了灌区5 a后地下水位变化趋势,并提出了灌区适宜的井渠用水比。结果表明,目前灌区地下水位呈不断下降趋势,削减灌区地下水开采量对地下水位的恢复有明显的作用。平水年削减10%的地下水开采量,人民胜利渠灌区井渠用水比例调整为1/0.78,上游调整为1/1.24,中游调整为1/0.85,下游调整为1/0.41,灌区机井数从原来的20 261眼削减到14 315眼,可以基本实现地下水的采补平衡。
In order to make rational use of surface water and groundwater resources in irrigated area and improve the ecological environment of irrigated area, taking the people of Victory Canal Irrigation District as an example, based on the analysis of groundwater exploitation and utilization status and its water level in irrigated area, combining groundwater simulation model with GIS technology, Eight scenario scenarios were set up to predict the trend of groundwater level after 5 years of irrigation and the suitable ratio of well and canal to irrigation was proposed. The results show that the current groundwater level in the irrigation area shows a declining trend. Reducing groundwater exploitation in the irrigation area has a significant effect on the recovery of the groundwater level. The amount of groundwater exploited by 10% reduction in Pingshui was adjusted to 1 / 0.78 for wells in Quang Triumph irrigation district, 1 / 1.24 for the upper reaches, 1 / 0.85 for the middle reaches and 1 / 0.41 for the lower reaches, Of 20,261 eyes cut to 14,315 eye, you can basically achieve the balance of groundwater.