文献类型：期刊文献

中文题名：贵州深切峡谷区典型岩溶地下河水文水化学特征——以贵州三塘地下河为例

英文题名：Hydrological and hydrochemical regime of a typical subterraneous river in a deep canyon karst area:A case study in the Santang underground river,Guizhou

作者：陈旺光 曾成 龚效宇 邰治钦 邓俊祖 杨明星

第一作者：陈旺光

机构：[1]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550081;[2]中国科学院大学,北京100049;[3]贵州师范大学喀斯特研究院/国家喀斯特石漠化防治工程技术研究中心,贵州贵阳550001;[4]东华理工大学水资源与环境工程学院,江西南昌330013;[5]贵州理工学院资源与环境工程学院,贵州贵阳550003

第一机构：中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550081

年份：2022

卷号：49

期号：4

起止页码：19-29

中文期刊名：水文地质工程地质

外文期刊名：Hydrogeology & Engineering Geology

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：国家自然科学基金联合基金项目(U1612441)。

语种：中文

中文关键词：峡谷型岩溶;地下河系统;水文水化学动态;稀释效应;CO_(2)效应;开放性效应

外文关键词：canyon karst;subterraneous river;hydrological and hydrochemical regime;dilution effect;CO_(2) effect;opening effect

摘要：黔中水利枢纽水源工程—平寨水库位于贵州高原三岔河深切峡谷型岩溶区,是保障黔中地区水资源安全的重要水利基础设施。文章采用水文水化学自动监测技术,对前期水文地质基础研究较为薄弱的平寨水库区间流域内的重要支流—三塘地下河系统的水文水化学变化规律进行了研究,在此基础上探讨了深切峡谷型岩溶地下河系统的岩溶发育规律及管道模式。研究结果表明,该地下河系统水化学动态主要受覆被CO_(2)效应、有效降雨稀释效应和径流-排泄通道开放效应三者的控制。在不同时间尺度和大气降水条件下,水化学动态的总体变化特征不同,起主导作用的效应也有所不同。水温在年尺度上呈夏季高冬季低的变化规律,日尺度上呈昼高夜低的变化规律。电导率和水中CO_(2)分压的动态变化,年尺度下,在覆被CO_(2)效应与稀释效应的共同作用下总体呈现平水期较高丰水期较低;月尺度下,降雨初期可见明显的覆被CO_(2)效应,降雨后则为有效降雨的稀释效应主控;在旱季无雨条件下的日尺度上,可见由径流-排泄通道的开放效应造成的水化学日动态。径流-排泄通道开放效应的识别,可为今后在岩溶水系统模型化研究中判断岩溶管道的承压状态提供水化学方面的依据。本研究对今后该区开展地表与地下水库联合调度、水资源合理利用研究提供了一定的水文地质基础。
The Pingzhai Reservoir,a water source project of the Central Guizhou Province hydro-junction project,is located in the deep canyon karst area of the Sancha river in the Guizhou Plateau.It is an important water conservancy infrastructure to ensure the safety of water resources in central Guizhou.In this paper,the hydrological and hydrochemical automatic monitoring technology is used to study the hydrological and hydrochemical regime of the Santang underground river system,an important tributary in the interval basin of the Pingzhai Reservoir,which lacks the early basic research of hydrogeology.On this basis,the karst development and conduit model of the deep canyon karst subterraneous river system are preliminarily discussed.The results show that the hydrochemical regimes are mainly controlled by the cover CO_(2) effect,effective rainfall dilution effect and opening effect of runoff-discharge channels.In different time scales and atmospheric precipitation conditions,the variation characteristics of hydrochemical regime are different,and the corresponding dominant effect is also different.The annual variation of water temperature is high in summer and low in winter,and the daily variation is high in day and low at night.The annual variations of electrical conductivity and partial pressure of CO_(2) of the groundwater is high in normal-water level period and low in high-water level period because of the combined effects of land cover CO_(2) and rainfall dilution.On the monthly scale,the cover CO_(2) effect can be observed during the initial stage of rainfall,but after rainfall the dilution effect control the variation of electrical conductivity and Pco2.On the daily scale in the dry season,the daily hydrochemical regime controlled by the opening effect of the runoff-discharge channels can be observed.The identified opening effect of the runoff-discharge channels can provide a hydrochemical basis for judging the pressure state of karst conduit in the modeling study of the karst water system.This study provides a hydrogeological basis for the joint scheduling of surface and underground reservoirs and the reasonable utilization of water resources in this area in the future.