摘要
黄河流域循化段是青海省开发利用地下水程度较高的地区,因地下水资源在时空分布上的不均匀性,利用程度最高的地区主要集中在河谷平原区。以黄河南岸一级支流街子沟为研究区,通过水文地质测绘、水文地质钻探、抽水试验及室内分析等,查明街子沟地下水埋藏条件及富水程度,圈出具有供水前景的富水地段,对街子沟松散岩类孔隙水天然资源量及可开采资源量进行计算预测,结果可知:(1)街子沟区域水量丰富地段位于上游拉雄段,含水层厚12.37~13.86 m,富水性等级为丰富,其余地段水量中等,实际涌水量为1 000.24~1 425.6 m3/d,矿化度0.48~0.52 g/L,水化学类型为HCO3·SO4-Ca·Na,自上游到下游地下水水质由好到坏呈现律性变化;(2)街子沟松散岩类孔隙潜水地下水天然资源量为13 037.06 m3/d,水质良好。上游地下水可开采资源量为4 851.68 m3/d,占断面径流量的37.2%,水量有保证,可作为河谷区村镇及下游重点城镇的后备水源。研究结论为区域城镇应急及后备水源建设提供水文地质依据。
The Xunhua section of the Yellow River Basin is an area with a high degree of groundwater development and utilization in Qinghai Province.Due to the uneven distribution of groundwater resources in time and space,the areas with the highest degree of groundwater utilization are mainly concentrated in the valley plain area,and Jiezi gutter,a tributary of the south bank of the Yellow River,is taken as the study area through hydrogeological mapping and hydrogeological drilling The water pumping test and indoor analysis were carried out to find out the underground water burial conditions and water abundance degree of Jiezi gutter,and to circle the water-rich areas with water supply prospect.The natural resources and recoverable resources of pore water of loose rock in Jiezi gutter were calculated and predicted,and the results were known:(1) The water-rich section in Jiezi gutter region is located in the Laxiong section of the upper reaches,with an aquifer thickness of 12.37~13.86 m,and the water-rich grade is rich,while the other sections have moderate water content,with an actual water inflow of 1000.24~425.6 m3/d,a salinity of 0.48~0.52 g/L,and a hydrochemical type of HCO3·SO4-Ca·Na,from the upstream to the downstream groundwater quality from good to bad shows a regularity change;(2) The natural resources of unconsolidated rock porewater in Jiezi gutter are 13 037.06 m3/d,and the recoverable resources of upstream groundwater are 4851.68 m3/d with good water quality,accounting for 37.2% of the sectional runoff.The water quantity is guaranteed,and can be used as the backup water source for villages and towns in the valley area and key towns in the downstream The conclusion of this study provides hydrogeological basis for emergency and reserve water source construction in regional cities and towns.
作者
袁有靖
肖善虎
张志弘
哈伟
李楠
YUAN You-jing;XIAO Shan-hu;ZHANG Zhi-hong;HA Wei;LI Nan(Qinghai Institute of Geological Environment Survey/Qinghai 906 Engineering Survey and Design Institute/Qinghai Key Laboratory of Environmental Geology,Xining,Qinghai 810007,China)
出处
《地下水》
2021年第4期39-41,共3页
Ground water
基金
青海省循化化隆地区:化隆回族自治县、循化撒拉族自治县、文都藏族乡三幅1:5万水工环地质调查(青国土资矿[2015]129)。
关键词
街子沟
水文地质条件
地下水天然资源量
可开采资源量
Jiezi gutter
hydrogeological conditions
natural groundwater resources
quantity of recoverable resources
