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Installation and Operation of Large Drainage Lysimeters on Grapes

by R. G. Evans, Washington State Univ, Prosser, United States,
M. W. Kroeger, Washington State Univ, Prosser, United States,
M. O. Mahan, Washington State Univ, Prosser, United States,



Document Type: Proceeding Paper

Part of: Grouting in Geotechnical Engineering

Abstract:

Six large (3.05 m ? 3.66 m ? 1.83 m) drainage lysimeters were installed in 1984 in the middle of a 1.2 ha trickle irrigated experimental vineyard. Each was planted to two V. vinifera grapevines. Water use of three cultivars was evaluated. Each lysimeter was lined with a single sheet of 0.5 mm thick PVC. Drainage effluent was collected by a continuous vacuum extraction system and measured weekly. Weekly soil water profiles were determined by neutron probe readings. Irrigations (15.1 Lph/1ys.) were monitored by flow meters and/or tipping bucket rain gauges. Daily replacement applications were scheduled with climatic data. Starting in 1989, irrigations were monitored (with rain gauges) and controlled with a datalogger. Data were analyzed by weekly water balances.

Subject Headings: Soil water | Measuring instruments | Drainage | Water resources | Water management | Irrigation | Crops

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