erosion susceptibilityerosion unit ploterosive velocityerosivityerosivity coefficienterossion processeruption cloudescarpmentescreeeskeressential elementestuaryestuary channeletalon erosioneuler numbereulerian windeurosemeutrophicationevaluationevaporationevaporation fogevaporation gaugeevaporation hook gageevaporation of waterevaporation panevaporation powerevaporation rateevaporation tankevaporative heat regulationevaporative powerevaporimeterevaporogramevaporographevaportion opportunityevapotranspirationevapotranspirometereventevent orientedevergreenexactexact integrationexamination of waterexcavationexceedance intervalexcess precipitationexcess rainfallexcessive rainfallexchangeable sodium percentageexcitation phenomenaexclosure