Multiscale geomorphic drivers of groundwater flow paths: subsurface hydrologic dynamics and hyporheic habitat diversity

Autor:	Geoffrey C. Poole, Christopher A. Frissell, Steven W. Running, Jack A. Stanford
Rok vydání:	2006
Předmět:	Hydrology geography Hydrogeology geography.geographical_feature_category Groundwater flow Floodplain Ecology Hydrological modelling Aquatic Science Aquifer properties Alluvial plain Hyporheic zone Ecology Evolution Behavior and Systematics Groundwater Geology
Zdroj:	Journal of the North American Benthological Society. 25:288-303
ISSN:	1937-237X 0887-3593
DOI:	10.1899/0887-3593(2006)25[288:mgdogf]2.0.co;2
Popis:	Application of a hydrogeologic computer model underscored the importance of geomorphic controls on groundwater and surface-water flow dynamics in the Nyack Floodplain, a montane alluvial floodplain in Montana, USA. The model represented the floodplain as a hierarchy of geomorphic patches, which facilitated analysis of model results using independent (predictor) variables at multiple scales. The analyses revealed that geomorphic structures at various spatial scales interact with the flow regime to influence the direction, magnitude, and stability of hyporheic flow within individual floodplain patches. Specifically: 1) the hydrologic flow network within the hyporheic zone is more responsive to seasonal changes in river discharge if floodplain topography is complex and aquifer properties are heterogeneous, 2) simplification of internal patch structure across the floodplain eliminates the influence of fine-scale geomorphic structures on the stability of groundwater flow paths, although the influence o...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::541569edf398ac5b600534fd126663f6 https://doi.org/10.1899/0887-3593(2006)25[288:mgdogf]2.0.co Zobrazit plný text záznamu