title: Predicted infiltration for sodic/saline soils from reclaimed coastal areas: sensitivity to model parameters.
abstract: This study was conducted to assess the influences of soil surface conditions and initial soil water content on water movement in unsaturated sodic soils of reclaimed coastal areas. Data was collected from column experiments in which two soils from a Chinese coastal area reclaimed in 2007 (Soil A, saline) and 1960 (Soil B, nonsaline) were used, with bulk densities of 1.4 or 1.5 g/cm(3). A 1D-infiltration model was created using a finite difference method and its sensitivity to hydraulic related parameters was tested. The model well simulated the measured data. The results revealed that soil compaction notably affected the water retention of both soils. Model simulations showed that increasing the ponded water depth had little effect on the infiltration process, since the increases in cumulative infiltration and wetting front advancement rate were small. However, the wetting front advancement rate increased and the cumulative infiltration decreased to a greater extent when θ₀ was increased. Soil physical quality was described better by the S parameter than by the saturated hydraulic conductivity since the latter was also affected by the physical chemical effects on clay swelling occurring in the presence of different levels of electrolytes in the soil solutions of the two soils.
authors.affiliation: Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Ministry of Education, College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China.
authors.forename: Dongdong
authors.identifier: 0000-0001-8834-9167
authors.initials: D
authors.lastname: Liu
authors.affiliation: Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Ministry of Education, College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China.
authors.forename: Dongli
authors.initials: D
authors.lastname: She
authors.affiliation: Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Ministry of Education, College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China.
authors.forename: Shuang'en
authors.initials: S
authors.lastname: Yu
authors.affiliation: Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Ministry of Education, College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China.
authors.forename: Guangcheng
authors.initials: G
authors.lastname: Shao
authors.affiliation: Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Ministry of Education, College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China.
authors.forename: Dan
authors.identifier: 0000-0002-3291-1058
authors.initials: D
authors.lastname: Chen
mesh_terms: D002681:China; D003198:Computer Simulation; D004573:Electrolytes / Q000032:analysis; D063366:Estuaries; D057446:Hydrodynamics; D008962:Models, Theoretical; D054712:Salinity; D012987:Soil / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D014872:Water Movements
chemical_list: D004573:Electrolytes; D012987:Soil; D014867:Water