Experimental evaluation of infiltration models for different land use and soil management systems

摘要: Soil structural and water transmission properties, as influenced by land use soil management, affect the coefficients of infiltration predictive models. Ten models were analyzed to assess these coefficients. The tested include Green Ampt (1911), Kostiakov (1932), Horton (1940), Mezencev (1948), Philip (1957), Holtan (1961)-two three-parameters, Stroosnijder (1976), Swartzendruber (1987), Kutilek Krejca (1987). Parameters evaluated for time-dependence precision with regard effects use/soil management landscape positions. field data used in based on double ring infiltrometer tests conducted 3 h at six different treatments North Appalachian Experimental Watersheds (NAEW) near Coshocton, Ohio. no-till without manure (NTWM), (NTM), corn-soybean rotation (NTCSR), conventional tillage (CT), meadow (M) forest. Measurements made three positions (e.g., shoulder or upper slope (US); back middle slope, (MS); foot (FS)). algebraic parameters nonlinear least squares regression fitted using measured time [I (t)] data. Among process-based models, model performed best matched I (t) lower sum (SS) higher efficiency (EF) Wilmot's index agreement (W). Overall three-parameter gave representation relationship lowest SS highest EF W most treatments, including had significant influence related initial rate sorptivity final steady state hydraulic conductivity saturation, whereas parameter only. (i.e., saturation) dependent NTM than other treatments.