河西走廊祁连山山前缺水区找水方向

Orientation of Water Seeking in The Area of Water Shortage Located in Qilianshan Mountain Pediment of Hexi Corridor

本文根据近 2 0年来在河西走廊从事水文地质工作所掌握的资料 ,结合前人研究成果 ,将山地与平原的接触关系归纳为 3种类型 ,每一种类型都具有特定的水文地质条件 ,它们的共同特点是存在于山体与走廊平原之间的“叠瓦状”大型逆冲隐伏断裂带及其所派生的山麓中新生界皱褶 ,阻止了山区基岩裂隙水与走廊平原第四系松散岩类孔隙水之间的水力联系 ,使山体与走廊平原衔接地带地下水位突变 ,产生 10 0～ 2 0 0m或更深的“地下跌水” ,也正是这一原因 ,使历年来在这一缺水区的地下水勘察变得尤为慎重。正确找水方向在于根据山体与平原的接触关系的不同 ,因地制宜地开发利用地下水 (泉水 )资源。

Based on the latest 20 years, data and former study results,we conclude that three types of connection relationship between mountains and plains, where each type has special hydrogeologic condtios, meanwhile all types have a common property which shows that groundwater level in the joining area between mountain and plain has an abrupt change, Even a 100～200m “groundwater drop' appears, because a largy reversal thrust hidden fault zone with shape of “repeatedly tiles' and its derivative cenozoic fold exist, as a result prevent groundwater in fractured aguifer within the mountain areas from flowing to Quaternary unconsolidated aquifers in the plain, as well as the project of the groundwater in the area must be careful. The orientation of groundwater seeking has to depend on different connection relationshuip between mountains and plain and groundwater or spiring water development should suit the local conditions.