Semi–Analytical Modeling of Transient Stream Drawdown and Depletion in Response to Aquifer Pumping
- California Polytechnic State Univ. (CalPoly), San Luis Obispo, CA (United States)
- Chung Yuan Christian University, Taoyuan City (Taiwan)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Analytical and semi–analytical models for stream depletion with transient stream stage drawdown induced by groundwater pumping are developed to address a deficiency in existing models, namely, the use of a fixed stream stage condition at the stream–aquifer interface. Here field data are presented to demonstrate that stream stage drawdown does indeed occur in response to groundwater pumping near aquifer–connected streams. A model that predicts stream depletion with transient stream drawdown is developed based on stream channel mass conservation and finite stream channel storage. The resulting models are shown to reduce to existing fixed–stage models in the limit as stream channel storage becomes infinitely large, and to the confined aquifer flow with a no–flow boundary at the streambed in the limit as stream storage becomes vanishingly small. The model is applied to field measurements of aquifer and stream drawdown, giving estimates of aquifer hydraulic parameters, streambed conductance, and a measure of stream channel storage. The results of the modeling and data analysis presented herein have implications for sustainable groundwater management.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0003525
- OSTI ID:
- 2404608
- Report Number(s):
- SAND--2024-08952J
- Journal Information:
- Ground Water, Journal Name: Ground Water Journal Issue: 6 Vol. 62; ISSN 0017-467X
- Publisher:
- Wiley - NGWACopyright Statement
- Country of Publication:
- United States
- Language:
- English
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