高悬浮物地表水河床渗透性变化分析  

Analysis on Characteristics of River-Bed Infiltration Ability with High Concentration of Suspended Solids

作　　者：黄勇[1,2,3] 侯嘉维[4] 杜新强[3,4] 韩建超[4] 刘圳[4] 

机构地区：[1]青海省水文地质工程地质环境地质调查院,青海西宁810008 [2]青海省水文地质及地热地质重点实验室,青海西宁810008 [3]中国地质调查局干旱半干旱区地下水与生态重点实验室,陕西西安710054 [4]吉林大学环境与资源学院,吉林长春130021

出　　处：《人民黄河》2014年第8期66-69,共4页Yellow River

基　　金：柴达木盆地循环经济试验区重点地区水文地质调查项目(121201-1121279)

摘　　要：综合野外渗水试验和室内高悬浮物浓度水体低流速渗水试验，分析那陵格勒河床入渗能力变化特征与机制，结果表明：那陵格勒河上游至下游，除1号桥处外，渗透系数K普遍较大，多在12．67～15．07 m/d之间；1号桥处河道较宽，流速较缓，河水中悬浮物沉积削弱了该处河床入渗能力；室内高悬浮物浓度水体在流动状态下的渗水试验证明地表水体悬浮物沉积对河床渗透性有直接影响。河流泥沙动力学计算表明：河床入渗能力从上游至下游逐渐减小，那陵格勒河冲洪积扇扇顶变化较小而前缘部位变化较大。Based on the field infiltration tests and low speed laboratory infiltration experiments of source water with high concentration of suspended solid,this paper analyzed the changing characteristics and mechanism of Nalinggele River bed infiltration ability. The results show that the hydrau-lic conductivity of riverbed is between 12. 67-15. 07 m/d except the No. 1 Bridge location. The hydraulic conductivity of this location is relative small,and this might be caused by slow water velocity leading to the deposition of suspended solids from river water. The calculation of the dynamics of river sand show that the hydraulic conductivity of river bed decreases from upstream to downstream and the changing degree in top of alluvial fan is smaller than that in the fan edge.

关 键 词：渗透系数 渗水试验 悬浮物 那陵格勒河 

分 类 号：P641[天文地球—地质矿产勘探]