岩溶高原地下水径流系统垂向分带

大量的矿产资源采掘、地质勘探、洞穴探测、示踪试验等揭露和观测研究发现地下水径流系统的分带性是客观存在的。根据含水层的埋藏条件、地下径流的空间形态、地下水动力性质、地下水循环深度和流程的差异，岩溶高原地下水径流系统垂向上可划分为:浅循环径流带、深循环径流带2大类，进一步划分为:表层径流带、垂向渗流带、季节波动带、潜水—承压水径流带及层状承压径流带、带状承压径流带6个分带。岩溶高原地下水径流系统分带主要由地层沉积旋回、地质构造切割及组合、地形地貌起伏变化、岩溶发育分带特性所决定。 

Vertical zoning of groundwater runoff system in karst plateau

The vertical zoning of groundwater runoff system in karst plateau have been discovered by large number of the exposed and observational studies of mineral resource exploitation, geological exploration, cave detection, tracer tests and so on. Based on burying condition of karst aquifer, spatial pattern of groundwater runoff, groundwater dynamics and the extent and depth of groundwater circulation, the groundwater runoff system can be divided into two types and six sub classes in karst plateau. The details are as follow (Table 1). The zoning of groundwater runoff system in karst plateau is mainly determined by the sedimentary facies and sedimentary cycle of the strata, geologic structural association, topographic relief, zoning of karst development.The characteristics of shallow-circulating runoff zone are with shallower circulation underground, circulating period within one hydrogeological year and being obviously impacted by seasonal change. The deep-circulating runoff zones are with deeper circulation under ground, circulating period long as several to several decade years or more and being less or few impacted by seasonal change. The characteristics of six sub-classes are direct-viewing and distinct,which would be described in detail in the paper.