Agricultural Drainage Reuse in Agroforestry Systems

by Kenneth K. Tanji, Univ of California, Davis, United States,
Fawzi Karajeh, Univ of California, Davis, United States,



Document Type: Proceeding Paper

Part of: Irrigation and Drainage

Abstract:

On the westside of California's San Joaquin Valley, agroforestry systems are being evaluated as a solution to the agricultural drainage problem. Eucalyptus tree plantations are established to consume the excess shallow saline ground water and cropland drainage waters. The long-term efficacy of this practice is being evaluated. This paper presents a growing body of data on soil water and salt fluxes in a tile-drained 9.43 ha Eucalyptus plantation. After several years of drainwater reuse, a substantial buildup of salinity and boron has occurred throughout the soil profile to the extent that the trees are no longer able to extract the available soil water.



Subject Headings: Drainage systems | Soil water | Water reclamation | Forests | Groundwater | Return flow | Salinity | Selenium

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