Approximate engineering solution for predicting groundwater table variation during reservoir drawdown on the basis of the Boussinesq equation

CORC > 力学研究所 > 中国科学院力学研究所 > 环境力学重点实验室(2009-2011)

	Approximate engineering solution for predicting groundwater table variation during reservoir drawdown on the basis of the Boussinesq equation
	Sun JP(孙建平); Li JC(李家春); Liu QQ(刘青泉); Zhang HQ(张会琴)
刊名	Journal of Hydrologic Engineering
	2011
通讯作者邮箱	jcli05@imech.ac.cn
卷号	16 期号:10 页码:791-797
关键词	Hydrologic models Groundwater management Water table Boussinesq equations Aquifers Verification Reservoirs
ISSN号	1084-0699
通讯作者	李家春
合作状况	其它
中文摘要	With reservoir drawdown, the groundwater table in the adjacent aquifer falls down correspondingly. It is useful to calculate the groundwater table variation as a function of time during reservoir drawdown for hydraulic and hydrological purposes. The Boussinesq equation with a moving boundary is applied to analyze the groundwater table variation in the unconfined aquifer during reservoir drawdown.This approach assumes a negligible seepage face. Because the moving boundary condition in the mathematical formulation precludes analytical solutions even for the linearized Boussinesq equation, we have transformed the Boussinesq equation into an advection–diffusion equation to address the negligible seepage face and the moving boundary condition. On the basis of the Laplace transformation, we yield an analytical solution of a fixed boundary problem, which is further simplified to upper and lower polynomial solutions for convenient practical use. The polynomial approximate solutions are satisfactorily compared with a number of numerical simulations of the nonlinear Boussinesq equation. The results indicate that the polynomial solutions match well with the numerical solution, but demonstrate that the replacement of the sloped reservoir–aquifer interface by a vertical interface may cause errors of up to 10% of the height of the reservoir drawdown in the prediction of the groundwater table location. On the basis of the polynomial solutions, a methodology is provided to determine the ratio of hydraulic conductivity to specific yield along with a chart for convenient practical use. The limitation of the present study is that the presented solution tends to underestimate the groundwater table with seepage face neglected for rapid drawdown, high specific yield, low hydraulic conductivity, or mildly sloped interface cases.
学科主题	环境流体力学
分类号	二类/Q2
类目[WOS]	Engineering, Civil ; Environmental Sciences ; Water Resources
研究领域[WOS]	Engineering ; Environmental Sciences & Ecology ; Water Resources
关键词[WOS]	FREE-SURFACE FLOW ; WATER-TABLE ; FLUCTUATIONS ; AQUIFERS ; BEACHES
收录类别	SCI ; EI
资助信息	国家杰出青年科学基金（10825211）和自然科学基金重点项目（10932012）
原文出处	http://dx.doi.org/10.1061/(ASCE)HE.1943-5584.0000372
语种	英语
WOS记录号	WOS:000296510900004
公开日期	2012-01-13
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/44595]
专题	力学研究所_环境力学重点实验室(2009-2011)
推荐引用方式 GB/T 7714	Sun JP,Li JC,Liu QQ,et al. Approximate engineering solution for predicting groundwater table variation during reservoir drawdown on the basis of the Boussinesq equation[J]. Journal of Hydrologic Engineering,2011,16(10):791-797.
APA	孙建平,李家春,刘青泉,&张会琴.(2011).Approximate engineering solution for predicting groundwater table variation during reservoir drawdown on the basis of the Boussinesq equation.Journal of Hydrologic Engineering,16(10),791-797.
MLA	孙建平,et al."Approximate engineering solution for predicting groundwater table variation during reservoir drawdown on the basis of the Boussinesq equation".Journal of Hydrologic Engineering 16.10(2011):791-797.