Concerning the Relationship between Evapotranspiration and Soil Moisture

摘要: Abstract Evapotranspiration observations have traditionally been scaled by potential evapotranspiration as a means of unifying the soil moisture-evapotranspiration relationship under variety meteorological conditions. However, this scaling alone does not unify during drying. supply-limited phase. In paper, second parameter is identified which applies to phase evapotranspiration. The maximum sustainable, or threshold evapotranspiration, occurs in vegetation-covered surfaces just before leaf stomata close, and when surface tension begins significantly restrict moisture release from bare pores. Simple expressions for are presented cases vegetation cover soil. number input variables required these rather small. We examine effect natural heterogeneities on computed proposed model. It shown that observed var...