摘要
沁河河口村水库的岩溶渗漏问题是勘察过程中的一个难点,为了查明库区的寒武系馒头组下部岩层的岩溶发育规律,在库区一河曲间采用两种互补性较强的示踪剂成功地进行了两次示踪试验。试验结果表明,示踪剂接收点的泉水来自河曲上游河水,投放点至接收点的地下水渗流速度为22.67 m/h,渗流方向受构造作用控制;接收点示踪剂的浓度变化曲线反映出二者之间不存在大的岩溶型管道流,其渗漏介质主要为裂隙和溶孔混合型。试验结果同时表明,示踪试验是岩溶发育地区进行水库渗漏研究的一种行之有效的手段。
Karst leakage problem is one of the difficult problems during the hydrogeological survey of Hekoucun reservoir.In order to find out the characteristic of karst development of Cambrian Mantou formation,two tracer experiments were carried out at the neck of an oxbow with two kinds of tracer which have strong complementarity.The results of the experiments indicate that the source of spring at tracer receiver point is the river water of upper reaches;the velocity of groundwater flow between the tracer injection and receiver points was 22.67 m/h,and the seepage flow direction is controlled by the geological structure.The change curve of tracer at the receiver points showed that there was no karst conduit flow between the injection and receiver points,and the leakage media is the combination of fracture and dissolved pore.The results also indicated that the tracer experiment is one of most useful methods for hydrology leakage survey in karst area.
出处
《资源环境与工程》
2010年第5期496-500,共5页
Resources Environment & Engineering
关键词
水利工程
河口村水库
岩溶
示踪试验
hydraulic engineering
hekoucun reservoir
karst
tracer experiment
