Lysimeter-based Water Balance Study in Japan

by Kinjiro Shibuya, Hokuriku Nat'l Agric Exp Stat, Inada Joetsu City, Japan,

Document Type: Proceeding Paper

Part of: Grouting in Geotechnical Engineering


Research on the water balance of agricultural land has been conducted using lysimeters for various objectives in Japan since the 1950s. In this paper, research for two major objectives will be dealt with according to historical development. One was to evaluate evapotranspiration (ET) as an important element of the water balance relating to water consumption of crops. Another was to make comprehensive analysis of the water balance of agricultural land, especially of sloping land. First, a short description of historical development of lysimeter-based research will be presented. Secondly, installation, operation, maintenance and data analysis for the lysimeters at the National Institute of Agricultural Sciences and National Research Institute of Agricultural Engineering will be explained in detail.

Subject Headings: Water balance | Measuring instruments | Irrigation water | Evapotranspiration | Crops | Water resources | Water use | Slopes | Japan | Asia

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