DOI: 10.5194/hess-22-2359-2018
Scopus记录号: 2-s2.0-85045655910
论文题名: Analysis of groundwater flow and stream depletion in L-shaped fluvial aquifers
作者: Lin C ; -C ; , Chang Y ; -C ; , Yeh H ; -D
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 4 起始页码: 2359
结束页码: 2375
语种: 英语
Scopus关键词: Aquifers
; Groundwater flow
; Groundwater resources
; Hydrogeology
; Laplace transforms
; Pumps
; Time domain analysis
; Water levels
; Continuity conditions
; Finite Fourier transform
; Method of separation of variables
; Simulations and measurements
; Steady state and transients
; Steady state solution
; Stream depletion rates
; Transient solutions
; Solution mining
英文摘要: Understanding the head distribution in aquifers is crucial for the evaluation of groundwater resources. This article develops a model for describing flow induced by pumping in an L-shaped fluvial aquifer bounded by impermeable bedrocks and two nearly fully penetrating streams. A similar scenario for numerical studies was reported in Kihm et al. (2007). The water level of the streams is assumed to be linearly varying with distance. The aquifer is divided into two subregions and the continuity conditions of the hydraulic head and flux are imposed at the interface of the subregions. The steady-state solution describing the head distribution for the model without pumping is first developed by the method of separation of variables. The transient solution for the head distribution induced by pumping is then derived based on the steady-state solution as initial condition and the methods of finite Fourier transform and Laplace transform. Moreover, the solution for stream depletion rate (SDR) from each of the two streams is also developed based on the head solution and Darcy's law. Both head and SDR solutions in the real time domain are obtained by a numerical inversion scheme called the Stehfest algorithm. The software MODFLOW is chosen to compare with the proposed head solution for the L-shaped aquifer. The steady-state and transient head distributions within the L-shaped aquifer predicted by the present solution are compared with the numerical simulations and measurement data presented in Kihm et al. (2007). © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79330
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan; Taiwan Typhoon and Flood Research Institute, National Applied Research Laboratories, Taipei, Taiwan
Recommended Citation:
Lin C,-C,, Chang Y,et al. Analysis of groundwater flow and stream depletion in L-shaped fluvial aquifers[J]. Hydrology and Earth System Sciences,2018-01-01,22(4)