青莲河流域地下水径流速度分析及资源量评价  

Groundwater Flow Velocity Analysis and Resource Evaluation in the Qinglian River Basin

作　　者：许兰芳 杨宏宇 

机构地区：[1]广东省地质调查院,广东 广州

出　　处：《水资源研究》2024年第6期622-632,共11页Journal of Water Resources Research

基　　金：广东省地质勘查与城市地质专项“广东北江中上游地区1:25万水文地质调查”(2023-31, 2024-23)和广东省2023年度国家公园建设专项“广东南岭国家公园生态水文地质调查”(2023GJGY023)。

摘　　要：本文通过分析地下水和地表水的δD和δ18O值以及3H浓度,探讨了不同地貌,特别是岩溶交互带的地下水的径流速度,并采用降雨入渗法和枯季径流模数法对各个分区的地下水资源量进行了评价。结果显示,部分岩溶交互带泉水δ18O值在雨后变得偏正,3H浓度在雨前和雨后分别为2.01 TU和1.33 TU,表明岩溶交互带泉水可能受到浅、深层火成岩裂隙水混合的影响。而该区地下暗河的3H浓度在雨前和雨后皆为1.35 TU,表明泉水对降雨的响应速度是大于地下暗河的。青莲河流域地下水排泄口的枯水期平均3H浓度揭露的地下水径流速度大小顺序为:岩溶交互带(1.60 TU) > 构造侵蚀中山(1.24 TU) > 峰丛谷地(1.17 TU) > 峰丛洼地(1.00 TU) >岩溶盆地(0.60 TU)。据计算,青莲河流域的地下水资源量为15681.05万m3/a,可采资源量为2496.03万m3/a,可开采量仅占补给量的15.91%,说明地下水可开采量是有补给保证的。研究有助于加深青莲河流域地下水循环的理解,为地下水污染防治和分区管理提供依据。The δD and δ18O values, as well as the concentration of 3H, of groundwater and surface water were analyzed to explore the flow velocity of groundwater in different landforms, especially in the karst hyporheic zone. Furthermore, the precipitation infiltration and dry-season runoff modulus method were used to evaluate the groundwater resources in various areas. The results showed that the δ18O value of the spring in karst hyporheic zone became positive after the rain, and the 3H concentration before and after the rain were 2.01 TU and 1.33 TU, indicating that the spring in karst hyporheic zone was affected by the mixing of shallow and deep igneous-fissure water possibly. The 3H concentration of the underground river in this area was 1.35 TU before and after rain, indicating that the response speed of spring water to rainfall is greater than that of the underground river. The order of groundwater flow velocity in dry

关 键 词：地下径流速度 地下水资源量 岩溶交互带 青莲河 ³H浓度 

分 类 号：P64[天文地球—地质矿产勘探]