勘探区位于闪电河断陷盆地的河谷平原,地势平坦,海拔标高1330m～1345m,总体南高北低。闪电河在勘探区的近边缘由南向北弯曲径流,其流量受上游沽源水库调蓄的影响,除雨季水库放水期间流量较大外,大部分时间干涸。闪电河为区域地下水的排泄区,勘探区内闪电河与地下水存在互补关系,雨季闪电河补给第四系孔隙潜水,其余时段第四系孔隙潜水补给 The exploration area is located in the valley plain of the Lightning River rift basin, with a flat elevation of 1330m ~ 1345m above sea level, with an overall high in the south and low in the north. Lightning River curved runoff from south to north at the near edge of the exploration area, and its flow rate is affected by the regulation and control of the upstream Guyuan Reservoir. Most of the time, except for the heavy rainfall during the discharge of the rainy season reservoirs, dried up. Lightning River is the drainage area for groundwater in the area, and the lightning river and groundwater in the exploration area are complementary to each other. In the rainy season, the lightning river recharges the Quaternary pore-diving, and Quaternary pore-diving recharge