秦岭山前截洪引渗与地下水库调蓄及其协同效应研究

Research on diversion-infiltration of flood and storage of underground reservoir and its collaborative effects in the piedmont of the Qinling Mountains

本文分析了秦岭山前截洪引渗条件,以及涝河冲洪积扇截洪引渗方式与方案及其效果,采用数值模拟方法研究了截洪引渗与地下水库调蓄的协同效应。得出涝河冲洪积扇采取有水库、有引渗方案,实施截洪引渗工程与地下水库调蓄的联动,平水年可增补地下水0.45×108m3/a,丰水年可削减洪峰90%以上,增开状态的地下水位与泉流量仍可持续恢复。秦岭山截洪引渗条件和地下水库调蓄功能优越,实施截洪引渗工程对调节水资源时空分配不均、储蓄南水北调水量,缓解关中地区水资源供需矛盾、减轻洪灾等具有重要意义与作用。

In this paper,the situations for diversion-infiltration of flood in the piedmont of the Qinling Mountains were analyzed.The strategies for diversion-infiltration of flood in the alluvial fan of the Lao River and their effects were also studied.The numerical method was adopted to study the joint effects of diversion-infiltration of flood and storage of underground reservoir.As a result of joint strategy with surface water reservoir,river diversion,diversion-infiltration of flood,and underground reservoir,the groundwater recharge can be increased by 0.45 × 108m3 /a in average years while the flood peaks can be reduce by 90% in wet years.In case of increasing groundwater exploitation,the groundwater table and spring discharge can be continuously recovered.Therefore,the situations for diversion-infiltration of flood and underground reservoir are perfect.It is significant to implement the diversion-infiltration of flood project for regulating the uneven temporal and spatial distribution of water resources,storing water for the South-to-North Water Diversion Project,relieving the contradiction of water demand and water supply in the Guanzhong Region,and mitigating the affect of floods,etc.