THE MOBILE RIVER IS THE FOURTH LARGEST IN THE NATION IN TERMS OF WATER FLOW, KNOWN AS NORTH AMERICA S AMAZON. MOST USGS GAUGING STATIONS ARE DISTRIBUTED ALONG SMALL HEADWATER STREAMS IN THIS BASIN, WITH ONLY A FEW LOCATED ON THE SWOT-OBSERVABLE RIVER REACHES WIDER THAN 100 M. THE GANDAKI RIVER BASIN IS A TRANSBOUNDARY RIVER BASIN IN THE HIMALAYAN MOUNTAINS, MAINLY LIES IN CENTRAL NEPAL. THIS RIVER BASIN IS LARGELY UNGAUGED, WITHOUT RELIABLE STREAM DISCHARGE DATA. OUR FIELD MEASUREMENTS NOT ONLY INCLUDE STREAM DISCHARGE AS GIVEN BY USGS GAUGING STATIONS, BUT ALSO CROSS-SECTIONAL FLOW VELOCITY, CHANNEL BATHYMETRY AND MORPHOLOGY, AND RIPARIAN TOPOGRAPHY AND VEGETATION CANOPY. THESE MEASUREMENTS FROM TWO HYDROLOGICALLY AND GEOMORPHICALLY DIFFERENT RIVER BASINS WOULD BE VALUABLE FOR EVALUATING THE HYDRAULIC PARAMETERS INVERTED BY SWOT DISCHARGE ALGORITHMS, INVESTIGATING THE IMPACTS OF TOPOGRAPHIC AND VEGETATION CANOPY LAYOVER ON THE SWOT RETRIEVALS OF RIVER WATER SURFACE ELEVATION AND SLOPE, AND EXPLORING POSSIBLE APPROACHES TO IMPROVING SWOT DATA PROCESSING METHOD AND DISCHARGE ALGORITHMS. OUR SCIENTIFIC INVESTIGATION OF SEDIMENT FLUXES WOULD DEMONSTRATE THE CRUCIAL VALUE AND BENEFIT OF GLOBAL SWOT DISCHARGE ESTIMATES IN TACKLING SEDIMENT RELATED ENVIRONMENT PROBLEMS AND HAZARDS. OUR SPATIALLY DISTRIBUTED SEDIMENT LOAD MODELS WITH THE CRUCIAL SWOT DISCHARGE INPUT WOULD PRODUCE SEDIMENT LOAD ESTIMATES AT RIVER REACH AND CATCHMENT SCALES, HENCE EXPANDING THE LIST OF SWOT DERIVED DATA PRODUCTS.