平原水库渗流场模拟及渗漏量计算——以斗门水库试验段为例
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摘要
以陕西省斗门水库试验段为例,通过野外取样及室内试验分析计算了库底沉积物的渗透系数,运用解析法求得了库区渗漏量和渗漏强度,采用数值法模拟了水库蓄水条件下的地下水流场变化。结果表明:库底沉积物渗透系数量级为10~(-3)m/d,渗漏强度约为14. 97 mm/a,库区东北部渗透系数及渗漏强度较大;库区渗漏量约为7 070. 05 m~3/a,约占总库容的4. 6‰,渗漏量变化受降水量影响较为明显;水库蓄水5年后区域地下水位整体抬升0. 1～0. 5 m,库区东北部地下水水力梯度明显增大,地下水流向发生偏转。
Taking the test section of Doumen Reservoir in Shaanxi Province as an example,the permeability coefficient of the sediment at the bottom of the reservoir was calculated by field sampling and laboratory test. The leakage amount and leakage strength of the reservoir area were obtained by analytical solution,and the groundwater flow field changes under reservoir water storage conditions was simulated by numerical method. The results showed that the permeability coefficient of the sediment at the bottom of the reservoir and the leakage strength were 10~(-3) m/d and 14. 97 mm/a,respectively; and the permeability coefficient and leakage strength in the northeastern part of the reservoir area were relative large. The leakage in the reservoir area was about 7070. 05 m~3/a,accounting for 4. 6‰ of the total storage capacity,and the leakage change was more affected by the precipitation. After five years of reservoir impoundment,the regional groundwater level rises 0. 1 ～ 0. 5 m,and the groundwater in the northeast of the reservoir area. The force gradient significantly increased and the groundwater flow direction deflected.
Taking the test section of Doumen Reservoir in Shaanxi Province as an example,the permeability coefficient of the sediment at the bottom of the reservoir was calculated by field sampling and laboratory test. The leakage amount and leakage strength of the reservoir area were obtained by analytical solution,and the groundwater flow field changes under reservoir water storage conditions was simulated by numerical method. The results showed that the permeability coefficient of the sediment at the bottom of the reservoir and the leakage strength were 10~(-3) m/d and 14. 97 mm/a,respectively; and the permeability coefficient and leakage strength in the northeastern part of the reservoir area were relative large. The leakage in the reservoir area was about 7070. 05 m~3/a,accounting for 4. 6‰ of the total storage capacity,and the leakage change was more affected by the precipitation. After five years of reservoir impoundment,the regional groundwater level rises 0. 1 ～ 0. 5 m,and the groundwater in the northeast of the reservoir area. The force gradient significantly increased and the groundwater flow direction deflected.
引文
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[4]李荣荣,熊黑钢,段鹏程,等.干旱区平原水库下游盐渍化土壤光谱时空分布特征分析[J].土壤通报,2016,47(3):532-536.
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[6]韩菲,陈永灿,刘昭伟.湖泊及水库富营养化模型研究综述[J].水科学进展,2003,14(6):785-791.
[7]谭界雄,位敏.我国水库大坝病害特点及除险加固技术概述[J].中国水利,2010(18):17-20.
[8]王旭东.水库工程常见病害及防治措施[J].科技创新与应用,2018(18):113-114.
[9]刁延峰.平原型水库工程地质问题浅议[J].陕西水利,2017(3):61-63.
[10]崔宇龙,黄涛,彭道平,等.川西高原某水库坝址区渗流场模拟及渗漏量计算[J].水资源与水工程学报,2014,25(5):51-54.
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[14]李伟.北塘水库对地下水的渗漏补给特性研究[D].南京:河海大学,2007.
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[17]李扭串.三泉水库库区渗漏模式及渗漏强度问题研究[J].水利建设与管理,2017,37(8):59-63.
[18]张晗.西安曲江南湖蓄水对地下水动力场的影响研究[D].西安:长安大学,2017.
[19]宋扬.灞河橡胶坝库区沉积物渗透系数空间变异及河水-地下水交互作用研究[D].西安:长安大学,2017.
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