典型岩溶包气带洞穴滴水水文过程研究——以桂林硝盐洞为例
发布时间：2019-04-28 13:53
【摘要】：选取桂林丫吉试验场硝盐洞为研究对象,通过示踪试验和高分辨率水文水化学监测,确定滴水补给来源,研究典型岩溶包气带洞穴滴水对降雨响应的水文过程。研究结果表明,硝盐洞XY5滴水主要受到两种径流成分补给,即集中补给的管道流和弥散流。硝盐洞上部包气带中可能存在表层岩溶带含水层,长期维持滴水流量。滴水流量、电导率和示踪剂浓度的峰值均出现在强降雨时段,表现出快速响应的管道流特征,存在降雨阈值引起硝盐洞滴水降雨响应。降雨前岩溶含水层水分条件是包气带水文响应差异的主要原因,雨季滴水对降雨响应迅速,XY5滴水对降雨响应的滞后时间为10 h;而旱季对降雨的响应滞后明显,滞后时间达9.8天,体现了土壤和表层岩溶带的调蓄作用。74.4 mm降雨量是旱季转雨季滴水响应的降雨阈值。借助于洞穴滴水的水文动态变化和示踪试验技术对于研究包气带水文过程,深入了解岩溶含水层结构及特征,揭示岩溶区降雨入渗补给机制具有重要作用。
[Abstract]:Through tracer test and high resolution hydrohydrochemical monitoring, the source of drip water supply was determined, and the hydrological process of drop water response to rainfall in typical karst vadose zone was studied by choosing nitrate cave in Yazhi test site in Guilin as the research object and through tracer test and high resolution hydrohydrochemical monitoring to determine the source of drip water supply. The results show that the XY5 dripping water in nitrate cave is mainly supplied by two kinds of runoff components, that is, centralized recharge pipe flow and dispersion flow. The surface karst aquifer may exist in the aeration zone of the upper part of the nitrate tunnel, and the dripping water flow can be maintained for a long time. The peak values of drip flow, conductivity and tracer concentration all appear in the heavy rainfall period, showing the characteristics of pipeline flow with rapid response, and there is a rainfall threshold which causes the rainfall response of nitrate holes. The water condition of karst aquifer before rainfall is the main reason for the difference of hydrological response in aerated zone. The response of drip water in rainy season to rainfall is rapid and the lag time of XY5 drop water response to rainfall is 10 hours. However, the response to rainfall in dry season lags behind obviously, and the lag time reaches 9.8 days, which reflects the regulation and storage of soil and surface karst zone, and the rainfall of 74.4 mm is the rainfall threshold of dripping water response from dry season to rainy season. It is very important to study the hydrological process of aeration zone, understand the structure and characteristics of karst aquifer, and reveal the mechanism of rainfall infiltration recharge in karst area by means of the hydrologic dynamic change and tracer test technique of cave drip water.
【作者单位】： 中国地质科学院岩溶地质研究所国土资源部/广西岩溶动力学重点实验室;联合国教科文组织国际岩溶研究中心;广西水文地质工程地质队;中国地质大学(北京);
【基金】：国家自然科学基金项目(编号:41172231;41502176;41302211) 中国地质调查局地质调查项目(编号:DD20160285) 广西院士顾问项目(编号:2002371310009)联合资助~~
【分类号】：P641.134
[Abstract]:Through tracer test and high resolution hydrohydrochemical monitoring, the source of drip water supply was determined, and the hydrological process of drop water response to rainfall in typical karst vadose zone was studied by choosing nitrate cave in Yazhi test site in Guilin as the research object and through tracer test and high resolution hydrohydrochemical monitoring to determine the source of drip water supply. The results show that the XY5 dripping water in nitrate cave is mainly supplied by two kinds of runoff components, that is, centralized recharge pipe flow and dispersion flow. The surface karst aquifer may exist in the aeration zone of the upper part of the nitrate tunnel, and the dripping water flow can be maintained for a long time. The peak values of drip flow, conductivity and tracer concentration all appear in the heavy rainfall period, showing the characteristics of pipeline flow with rapid response, and there is a rainfall threshold which causes the rainfall response of nitrate holes. The water condition of karst aquifer before rainfall is the main reason for the difference of hydrological response in aerated zone. The response of drip water in rainy season to rainfall is rapid and the lag time of XY5 drop water response to rainfall is 10 hours. However, the response to rainfall in dry season lags behind obviously, and the lag time reaches 9.8 days, which reflects the regulation and storage of soil and surface karst zone, and the rainfall of 74.4 mm is the rainfall threshold of dripping water response from dry season to rainy season. It is very important to study the hydrological process of aeration zone, understand the structure and characteristics of karst aquifer, and reveal the mechanism of rainfall infiltration recharge in karst area by means of the hydrologic dynamic change and tracer test technique of cave drip water.
【作者单位】： 中国地质科学院岩溶地质研究所国土资源部/广西岩溶动力学重点实验室;联合国教科文组织国际岩溶研究中心;广西水文地质工程地质队;中国地质大学(北京);
【基金】：国家自然科学基金项目(编号:41172231;41502176;41302211) 中国地质调查局地质调查项目(编号:DD20160285) 广西院士顾问项目(编号:2002371310009)联合资助~~
【分类号】：P641.134
【参考文献】
相关期刊论文 前10条
1 孙U，
本文编号：2467688
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2467688.html
