井渠结合灌区地下水动态预报及适宜渠井用水比分析

The Groundwater Level Forecast and the Rational Ratio Analysis for Irrigation District with both Wells and Canals

以陕西泾惠渠井渠结合灌区为例,根据灌区多年降雨量、渠灌用水量、井灌用水量资料及渠井灌溉用水量的比值,利用多元非线性相关分析法建立了灌区地下水动态预报的数学模型。对减少渠灌用水量增加井灌用水量、增加渠灌用水量减少井灌用水量、渠灌与井灌用水量合理比值3种情况下地下水动态进行了预测,提出了适宜的渠井用水比例。为灌区地下水合理开采和灌溉水资源优化配置提供依据。

Using the nonlinear-related method, this paper adopts a mathematic mode of forecasting the level of underground water in irrigation district which takes jinghuiqu ＇irrigation district of shanxi province as an example and is based on the data of the years＇ rainfalls, the consuming amount of irrigation by canal and well and the rational ratio of them in the irrigation district. The paper forecasts the dynamic of the underground water in the three situations as follows ： first, adding the consuming amount of water by well while decreasing consuming amount of water by canal; second, decreasing the consuming amount of water by well while adding consuming amount of water by canal; third, the proper ratio of canal-well water, and proposes the rational ratio canal-well water. The results can be used as the tool for the reasonable exploitation of underground water in irrigation districts and the optimized disposition of the water resource for irrigation.