deep gullydeep percolationdeep percolation lossdeep ploughingdeep water wavedeferred rotation grazingdeflationdeflection angledeflection zonedeflicculationdeflocculatedegradationdegradation channeldegrading riverdegreedegree of retardancedegree of saturationdehydrationdelayed flow ground water flowdelayed gravity drainagedelayed horton overland flowdelayed yielddelfdelineationdelivery rationdeltadeltaic depositdem resolutiondemanddemand surgedemartone classificationdemineralizationdendritic drainagedenehy groynedensitydensity currentdensity flowdensity numberdentaldentatedentated silldenticledenticulatedenticulated formdentiformdentigerousdenudationdeperssion springdepletiondeposit