Crop Canopy Models for Estimating Evapotranspiration from Row Planted Field

by Yoshisuke Nakano, Kyushu Univ, Fukuoka, Japan,
Masaharu Kuroda, Kyushu Univ, Fukuoka, Japan,

Document Type: Proceeding Paper

Part of: Irrigation and Drainage


To evaluate the consumptive use efficiency of irrigated water, it is useful to estimate the soil surface evaporation component separately from the transpiration component. Interception of radiation by foilage is one of the major factors influencing evaporation. Ellipsoidal, rectangular and prototype canopylike models were employed to assess the quantity of incoming radiation received by soil and foilage. With mathematical models developed to describe soil-plant energy exchange and water transport, we estimated uneven distribution of evaporation from soil surface between rows.

Subject Headings: Crops | Canopies | Evapotranspiration | Water supply systems | Radiation | Soil water | Water conservation | Surface irrigation

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