A Practical Means for Estimating Irrigation Canal Seepage Contribution to Agricultural Subsurface Drains

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by Gene C. Vittetoe, USDA, Soil Conservation Service, Temple, TX, USA,

Document Type: Proceeding Paper

Part of: Development and Management Aspects of Irrigation and Drainage Systems:

Abstract: This paper describes a means for estimating canal seepage contribution to nearby agricultural subsurface drains. Canal seepage rate is influenced by a complex of many variables, but the rate is predominated by the soil properties at and near the flow boundary of the canal. The procedure for estimating canal seepage examines a seepage loss factor at the canal flow boundary, as feet per square feet per day, in respect to a soil factor that utilizes the precentage of fines, defined as the 0. 074 millimeter size, and the slope of the sand fraction.

Subject Headings: Canals | Subsurface drainage | Seepage | Salt water | Water resources | Water supply | Soil water |

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