Simulation of stream-groundwater exchange and near-stream flow paths of two first-order mountain streams using MODFLOW
- Univ. of New Mexico, Albuquerque, NM (United States)
- Univ. of Vienna (Austria)
Hydrologic exchange between surface water and groundwater has been shown to exert strong controls on stream biota and biogeochemical processes. To quantify such exchange, the authors constructed two-dimensional unconfined groundwater flow models for two first-order stream sites in New Mexico, Aspen Creek and Rio Calaveras, using the U.S.G.S. modular three-dimensional finite-difference groundwater flow model (MODFLOW). They calibrated the model to hydraulic head, stream stage, and seepage meter measurements. Model-calibrated flow rates between the stream and local aquifer system range between 10{sup {minus}4} and 10{sup {minus}6} cm/s at Aspen Creek, and 10 {sup {minus}4} and 10 {sup {minus}7} cm/s at Rio Calaveras. Modeled flow rates at both sites tended to under predict seepage meter estimates by one-half to one order of magnitude. A particle tracking code (MODPATH) delineated near-stream flow paths. Near-stream flow paths were found to be associated with stream meander bends and areas where the streambed slope increased significantly.
- OSTI ID:
- 37572
- Report Number(s):
- CONF-9403190-; ISBN 1-882132-28-9; TRN: IM9519%%501
- Resource Relation:
- Conference: 2. international conference on ground water ecology, Atlanta, GA (United States), 27-30 Mar 1994; Other Information: PBD: 1994; Related Information: Is Part Of Proceedings of the second international conference on ground water ecology; Stanford, J.A. [ed.] [Univ. of Montana, Polson, MT (United States). Flathead Lake Biological Station]; Valett, H.M. [ed.] [Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Biology]; PB: 400 p.
- Country of Publication:
- United States
- Language:
- English
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