Optimization of Salinity Control in Grand Valley

by Wynn R. Walker, (M.ASCE), Assoc. Prof.; Dept. of Agr. and Chem. Engrg., Colorado State Univ., Fort Collins, Colo.,
Robert G. Evans, (M.ASCE), Research Assoc.; Dept. of Agr. and Chem. Engrg., Colorado State Univ., Fort Collins, Colo.,
Gaylord V. Skogerboe, (M.ASCE), Prof.; Dept. of Agr. and Chem. Engrg., Colorado State Univ., Fort Collins, Colo.,


Serial Information: Journal of the Irrigation and Drainage Division, 1979, Vol. 105, Issue 1, Pg. 15-28


Document Type: Journal Paper

Abstract: A mathematical simulation of the cost-effectiveness relationship for various agricultural and desalination structural alternatives for reducing salt pickup by irrigation return flows was developed and applied in the Grand Valley of western Colorado. Cost-effectiveness functions developed from the model were then optimized using a least-cost criterion to determine the most cost-effective strategies for salinity control in the valley. The analysis indicates that lining small conveyance channels to reduce seepage and increase the efficiency of the existing furrow irrigation systems should be given the highest priority. Canal lining and desalination of return flows are costly alternatives, but are feasible when the level of salinity control requires nearly total alleviation of the problem. Some structural alternatives such as field and interceptor drainage exhibited more than an order of magnitude higher costs and should not be considered.

Subject Headings: Salinity | Financial management | Return flow | Linings | Desalination | Irrigation systems | Optimization models | Flow simulation | North America | Colorado | United States

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