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依据塔里木河下游断流河道2000—2006年8次生态输水期间地下水埋深监测数据,拟合了输水后地下水埋深与离河距离关系的曲线方程,进而对输水后地下水的补给量及其变化特征进行了计算和分析,探讨了生态输水的横向影响范围及其变化特点。结果表明,塔里木河下游区域输水后地下水总净补给量为7.82487亿m3,占总下泄水量的35.63%。8次输水过程中,除第2次输水和第6次输水外,其余各次输水期间,地下水净补给量都呈下降趋势。对输水后横向影响范围的分析表明,横向影响范围与输水量大小和持续时间密切相关。随着输水的进行,横向影响范围呈明显扩大趋势,纵向上各断面的横向影响范围的变化表现出了局部波动,整体变化与距离输水源头远近呈弱相关性的特点。
According to the monitoring data of groundwater depth during the eight ecological water conveyance periods from 2000 to 2006 in the lower reaches of the Tarim River, the curve equation of the relationship between the groundwater depth and the distance to the river after water conveyance is fitted, and then the recharge quantity of the groundwater after the water conveyance And its changing characteristics are calculated and analyzed, and the horizontal influence range and its changing characteristics of ecological water conveyance are discussed. The results showed that the total net recharge of groundwater after the water delivery in the lower reaches of the Tarim River was 78,287.7 million m3, accounting for 35.63% of the total discharge. In the process of 8 water transports, except for the second water transfer and the 6th water transfer, during the other water conveyance periods, the net recharge of groundwater all showed a downward trend. The analysis of the lateral influence range after water conveyance shows that the lateral influence range is closely related to the size and duration of water conveyance. With the progress of water conveyance, the horizontal influence range has been obviously expanded. The changes of the lateral influence range of each section in vertical show the local fluctuation, and the overall change is weakly correlated with the distance from the water source.