Recent advances in remote sensing in hydrology . Introduction. Remote sensing has held a great deal of promise for hydrology, mainly because of the potential to observe areas and entire river basins rather than merely points.
of it, or in some cases, actually measure hydrologic state variables.
For example, Measurements of the reflected solar radiation give information on albedo, thermal sensors measure surface temperature, and microwave sensors measure the dielectric properties and hence, the moisture content, of surface soil or of snow .
(2) providing input data such as soil moisture or delineated land use classes that are used to define runoff coefficients.