渭河临潼段漫滩沉积物渗透系数分析  

Analysis of floodplain sediments saturated hydraulic conductivity in Lintong section of Weihe river

作　　者：葛佳亮 严婷 吕敬[1,2] 董洁 柯贤敏 GE Jialiang;YAN Ting;LU Jing;DONG die;KE Xianmin(School of Environmental Science and Engineering, Changan University ,Xian 710054, China;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang＇an University ,Xi an 710054, China)

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054 [2]长安大学旱区地下水与生态效应教育部重点实验室,陕西西安710054

出　　处：《水资源与水工程学报》2018年第2期201-204,211,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(41072183)

摘　　要：河漫滩沉积物渗透系数空间变异性特征对流域生态环境修复与保护具有重要意义。为研究河漫滩沉积物渗透系数空间变异性特征,采用双环试验法和竖管试验法,分别选取渭河临潼段内6个试验段合计6个非饱和试验点、138个饱和试验点渗透系数进行研究,并通过地统计学法进行分析,发现渭河漫滩非饱和带渗透系数和饱和带渗透系数分别介于1.30~6.08 m/d和0.002~1.763 m/d之间,结果表明:渭河临潼段漫滩沉积物非饱和渗透系数较大,饱和渗透系数较小;河漫滩饱和渗透系数沿河符合正态分布且变异性较强;河漫滩饱和渗透系数空间相关性较弱,但均具有空间自相关性。研究结果为渭河流域地表水和地下水转换关系研究提供了理论和数据支持。The spatial variability of the hydraulic conductivity of floodplain sediments is of great signifi- cance to the restoration and protection of ecological environment in the basin. In order to study the spatial variability of the hydraulic conductivity of the floodplain sediments, using double loop test method and standpipe test method, we selected 6 unsaturated test sites and 138 saturated test sites in total for the six test sections of the Lintong section of the Weihe River, respectively. All data were analyzed by geograph- ical statistics method. We found that the hydraulic conductivity coefficients of the unsaturated zone and the saturated zone in the Weihe floodplain are between 1.30 m/d - 6.08 m/d and 0. 002 m/d - 1. 763 m/d, respectively. The results show that： the unsaturated hydraulic conductivity of the floodplain sedi- ments in the Lintong section of the Weihe River is large and the saturated hydraulic conductivity is small ; the saturated hydraulic conductivity of the floodplain is consistent with the normal distribution along the river and the variability is strong. The spatial correlation of the saturated hydraulic conductivity of the floodplain is weak, but both have spatial autocorrelation. The results provide theoretical and data support for the study of surface water and groundwater conversion in Weihe River Basin.

关 键 词：河漫滩 渗透系数 空间变异性 竖管试验法 双环试验法 渭河临潼段 

分 类 号：TV139.1[水利工程—水力学及河流动力学] P641.2[天文地球—地质矿产勘探]