in this study, hydrus2d/3d software was used to estimate the hydraulic parameters of van genuchten-mualem model via inverse modeling using double-ring infiltrometers data in 3 different soil textures. nine scenarios of inverse modeling (divided in three groups) were considered with different number (5, 4 and 3) of fitted hydraulic parameters for optimization. in the first group, simulation was ...

Film hole irrigation is an advanced low-cost and high-efficiency irrigation method, which can improve water conservation and water use efficiency. Given its various advantages and potential applications, we conducted a laboratory study to investigate the effects of soil texture, bulk density, initial soil moisture, irrigation depth, opening ratio (ρ), film hole diameter (D), and spacing on cumu...

infiltration is a complex process that changed by initial moisture and water head on the soil surface. the main objective of this study was to estimate the coefficients of infiltration equations, kostiakov-lewis, philip and horton, and evaluate the sensitivity of these equations and their coefficients under various initial conditions (initial moisture soil) and boundary (water head on soil surf...

Sixteen different sites from two provinces (Lorestan and Illam) in the western part of Iran were considered for field data measurement cumulative infiltration, infiltration rate, other effective variables that affect process. Soil is recognized as a fundamental process hydrologic cycle affecting surface runoff, soil erosion, groundwater recharge. Hence, accurate prediction one most important ta...

Yanwei Fan 1,2, Ning Huang 1,*, Jiaguo Gong 3, Xiaoxia Shao 2, Jie Zhang 1 and Tong Zhao 2 1 Key Laboratory of Mechanics on Disaster and Environment in Western China, the Ministry of Education of China, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730050, China; [email protected] (Y.F.); [email protected] (J.Z.); 2 College of Energy and Power Engineering, Lanzhou Un...