Satellite surveillance of evaporative depletion across the Indus Basin

摘要: [1] The irrigated Indus Basin in Pakistan has insufficient water resources to supply all its stakeholders. Information on evaporative depletion across the is an important requirement if are be managed efficiently. This paper presents Surface Energy Balance Algorithm for Land (SEBAL) method used compute actual evapotranspiration large areas based public domain National Oceanic and Atmospheric Administration (NOAA) satellite data. Computational procedures retrieving from satellites have been developed over last 20 years. The current work among first applications estimate annual scale a vast river basin system with minimum of ground Only sunshine duration wind speed required as input data remote sensing flux algorithm. results were validated by comparing field-scale transient moisture flow model, situ Bowen ratio measurements, residual balance analyses area 3 million ha. accuracy assessing time-integrated varied 0% 10% field 5% at regional level. Spatiotemporal information helps evaluate distribution use between irrigation project areas. Wide variations crop types found. Satellite-based measurements can provide such avoid need rely databases.