Subsurface Drainage System for the Klamath Projectby Dan M. Fults, US Bureau of Reclamation, Klamath, Falls, OR, USA,
John F. Cook, US Bureau of Reclamation, Klamath, Falls, OR, USA,
Abstract: The U. S. Bureau of Reclamation's Klamath Project was authorized in 1905 for irrigation purposes. A subsurface drainage system was constructed in the public lands within the Project to provide water table management and salinity control. Construction began in 1984 and was completed in 1986. The subsurface drainage system facilitates the ease of control over noxious weeds, moisture control in the root zone, and provides for earlier cultivation. Cost of various alternatives were prepared prior to the selection of a final design. Several types of drain envelopes were tested including: bare drain, fabric cover, cinders, and gravel. Based upon the results of the field test, a final design was prepared which utilized a cinder filled drainage envelope with a conventional cross section and a lateral spacing not to exceed 800 feet. Buried collector pipe is expected to provide a cost savings over deep open drains in the long term.
Subject Headings: Subsurface drainage | Drainage systems | Irrigation | Salt water | Vegetation | Field tests | Spacing
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