Development of a Hydro-Salinity Simulation Model for Colorado’s Arkansas Valley
Publication: Journal of Irrigation and Drainage Engineering
Volume 134, Issue 6
Abstract
A model to calculate the quantity and quality of river flows by simulating hydro-chemical processes in soil and the spatial/temporal distribution of irrigation return flows is introduced. By simulating the hydro-chemical processes, the quantity and quality of the deep percolating water can be predicted. The spatial and temporal distribution of the deep percolating water is simulated by constructing a groundwater flow path and calculating the groundwater travel time using response functions. A probabilistic approach was developed to calculate the groundwater travel time taking into account the fact that some irrigated fields have subsurface drainage which shortens travel times. All related hydrological components are integrated into the computation of river flow quantity and quality including groundwater return flow, irrigation tail water, tributary inflow, river diversion, phreatophyte consumption, river channel losses, and river depletion due to pumping. An illustrative example is included to demonstrate the capabilities of the model. The results of this example show that river salinity is lower during the irrigation season and higher during the off season. Due to salts carried by return flows, downstream reaches have higher salinity levels than upstream reaches.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 134 • Issue 6 • December 2008
Pages: 757 - 767
Copyright
© 2008 ASCE.
History
Received: Aug 4, 2006
Accepted: Mar 16, 2007
Published online: Dec 1, 2008
Published in print: Dec 2008
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