| 雨洪水回灌过程中堵塞滤层特征试验 |
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| 引用本文： | 童坤,束龙仓,黄修东,刘波,杨超.雨洪水回灌过程中堵塞滤层特征试验[J].水利水电科技进展,2011,31(4):52-55. |
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| 作者姓名： | 童坤 束龙仓 黄修东 刘波 杨超 |
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| 作者单位： | 河海大学水文水资源与水利工程科学国家重点实验室;青岛市水文局;南京水利科学研究院; |
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| 基金项目： | 南京水利科学研究院基金(Y50801); “十一五”国家科技支撑计划重点项目(2006BAB14B04) |
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| 摘 要： | 采用室内砂柱试验模拟雨洪水回灌条件下含水层的堵塞过程,通过测定堵塞层的渗透系数和渗滤速率的变化分析回灌过程中的物理堵塞特征。试验结果显示,在回灌后36h,砂柱上部(25～40cm)的渗透系数明显减小,由初始的6.58m/d减小到3.72m/d,而中下部(40～70cm)的渗透系数变化很小,由初始的6.45m/d减小到5.25m/d;比较悬浮物质量浓度分别为50mg/L,100mg/L,200mg/L和400mg/L的回灌水回灌过程表明,悬浮物质量浓度越高,砂层的渗透速率下降越快;对比分析回灌前后的悬浮物颗分结果表明,回灌后的悬浮物(砂层表部淤泥层)出现细化现象;回灌过程中在砂柱表面形成的淤泥层和砂层上部的淤堵是整个含水层堵塞失效的主要原因。
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| 关 键 词： | 雨洪水回灌 物理堵塞 悬浮物质量浓度 渗滤速率 |
| 修稿时间： | 2011/9/6 0:00:00 |
Characteristics of mechanical clogging in rain-flood infiltration system |
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| TONG Kun,SHU Long-cang,HUANG Xiu-dong,LIU Bo,YANG Chao.Characteristics of mechanical clogging in rain-flood infiltration system[J].Advances in Science and Technology of Water Resources,2011,31(4):52-55. |
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| Authors: | TONG Kun SHU Long-cang HUANG Xiu-dong LIU Bo YANG Chao |
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| Affiliation: | TONG Kun1,SHU Long-cang1,HUANG Xiu-dong2,LIU Bo1,YANG Chao3(1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China,2.Hydrology Bureau of Qingdao,Qingdao 266071,3.Nanjing Hydraulic Research Institute,Nanjing 210029,China) |
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| Abstract: | The mechanical clogging process of aquifer under rain-flood infiltration was simulated by means of the laboratory tests on sand columns.The characteristics of mechanical clogging were analyzed by measuring the variations of permeability coefficient and infiltration rate of the clogging layer during the infiltration process.The test results show that 36 h after the infiltration,the permeability coefficient at the upper part(25-40 cm) of the sand column significantly decreases,from the initial 6.58 m/d to 3.7... |
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| Keywords: | rain-flood infiltration mechanical clogging suspended sediment concentration infiltration rate |
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