Synergy between satellite observations of soil moisture and waterstorage anomalies for runoff estimation


This paper presents an innovative approach, STREAM – SaTellite-based RunoffEvaluation And Mapping, to derive daily river discharge andrunoffestimates from satellite observations of soil moisture,precipitation,and total water storage anomalies (TWSAs). Despite a very simplemodelstructure, by directly ingesting observations of soil moistureand totalwater storage data, STREAM model allows the modeler to neglectprocessesthat are implicitly accounted for in the input data andaccurately estimaterunoff and river discharge. Therefore, human-driven processes(e.g., irrigation,land use change), that are typically very difficult to model dueto missinginformation, and that might have a large impact on thehydrological cycle,and hence on runoff, are modeled implicitly.