Evaluation of river discharges derived from remote sensing and land surface models

This study assesses river discharges derived using remote sensing and hydrologic modeling approaches throughout the CONUS. The remote sensing methods rely on total water storage anomalies (TWSA) from the GRACE and GRACE-FO satellites and water surface elevations from altimetry satellites (i.e., JASON-2/3 and Sentinel-3) to estimate discharge. Surface and subsurface runoff from two Land Surface Models (LSM), NOAH and CLSM, are routed using the Hillslope River Routing model to determine discharge. The LSMs are part of NASA’s Global Land Data Assimilation System (GLDAS).