Evapotranspiration Monitoring and Validation in the Weihe River Basin and Upper Yellow River Basin

摘要

The actual evapotranspiration (ETa) of land surfaces is most crucial information for water balance assessment and runoff modelling. In the Sino- Dutch cooperation project "Establishment of a Satellite Based Water Monitoring and Flow Forecasting System in the Yellow River Basin" actual evapotranspiration in the basin is monitored with the EWBMS methodology. Geostationary FY-2C satellite information from the VIS and TIR spectrum is used to derive daily actual evapotranspiration data fields and treating the ETa calculation by the energy- balance approach. It is concluded that the quality of rainfall run-off modelling and water resources assessment is highly improved by spatially continuous and near real time evapotranspiration data. The focus in the project is on the source area of the Yellow River and the lower Wei River basin, the largest tributary of the Yellow River.