evapotranspirometereventevent orientedevergreenexactexact integrationexamination of waterexcavationexceedance intervalexcess precipitationexcess rainfallexcessive rainfallexchangeable sodium percentageexcitation phenomenaexclosureexcursionexfiltration flowexfoliation weatheringexhaust cloudexit channelexosphereexpanding hydraulic jumpexpansionexpansion jointexpansion waveexpasion channelexperimental modelexponentexponential extinction modelexponential functionexposureexprimental designexsiccationextensive croppingexternal forceextra terresrial radiationextraction wellextrapolationextratropical cycloneextremaextremeextreme pointsextreme valueseye of the stormeye of the wind