西安市主城区地下水位动态类型划分研究

Study on division of groundwater dynamic type in main urban of xi'an

为了解西安市主城区地下水位动态类型的空间分布情况,本文以水文地质单元分区为依据,选取15眼典型监测井的地下水位埋深数据,采用基于非线性变换的主成分投影-聚类(PCP-C)模型,对不同区域的地下水位动态类型进行了分类研究。结果表明:研究区地下水位动态类型总体可分为水文影响型和开采影响型,其中非开采区范围内,从河漫滩至二级阶地地下水动态受水文因素影响由强变弱;黄土坮塬、自备井开采区及水源地集中开采区受人为活动影响较大,为开采影响型。

In order to understand the spatial distribution of groundwater level dynamic type in the central areas of Xi'an, based on different hydrogeologic units , the paper selected groundwater depth data of 15 typical monitoring wells ,and used principal component projection-clustering ( PCP-C) model which is based on nonlinear transformation to study groundwater level dynamic type in different regions .The results showed that the groundwater dynamic types overall study area can be divided into types of hydrological in -fluence and mining influence .The influence of hydrological factors ranging from flood plain to second-or-der in non-mining areas change gradually from strong to weak;loess tableland ,self-supply well mining ar-eas and water source concentrated mining areas are greatly influenced by human activities and these areas belong to the type of exploitation influence .