Title : 
Hydrologic Research before and after Agristars
         
        
            Author : 
Engman, Edwin T.
         
        
            Author_Institution : 
U.S. Department of Agriculture, Agricultural Research Service, Beltsville, MD 20705
         
        
        
        
        
        
            Abstract : 
Hydrologic research prior to AgRISTARS had followed a rather defined path in which the knowledge curve with time resembles a staircase, rather than a constant incline. AgRISTARS did not introduce remote sensing to hydrology. Some aspects of land-cover analysis, snow area, and floodplain delineation were being studied. However, the concentrated effort of remote-sensing applications to hydrology did help add another step to the knowledge curve.
         
        
            Keywords : 
Control systems; History; Hydrologic measurements; Hydrology; Irrigation; Oceans; Rain; Remote sensing; Snow; Water resources;
         
        
        
            Journal_Title : 
Geoscience and Remote Sensing, IEEE Transactions on
         
        
        
        
        
            DOI : 
10.1109/TGRS.1986.289583