Simulating evaporation from short-rotation forest: variations within and between seasons

摘要: Abstract A physically based soil water model was applied to a fertilized and irrigated short-rotation willow stand on clay soil. The is an extension of Richards' equation, the retention curve saturated conductivity are determined by analyses cores. Penman-Monteith combination equation used calculate potential daily transpiration, evaporation interception evaporation. Daily meteorological data as driving variables. Evaporation, estimated energy balance/Bowen ratio method, soil-water tension measurements made over several years, were verify model. Measured intercepted vegetation 1 year also compared with simulated monthly values. Good agreement found between from Bowen measurements. cumulative seasonal exceeded Penman open up 31% in 3 years out 4; it ranged 416 584 mm for period May through October. On mean basis, transpiration 66%, 23% 11% total comprised 5–23% precipitation. study showed interannual variations attributable variation climate (including irrigation) well age development. This indicates that quite general many respects; tentatively suggested be accurate simulation balance components forest this type climate.