Computer Simulation Analysis on Reclamation of Salt‐Affected Soils in San Joaquin Valley, California

Abstract

A computer land reclamation model was developed and applied to a field leaching study of moderately salt‐affected profiles. Leaching was accomplished by ponding 15 cm of water intermittently in 3 m by 3 m basins every 1 to 2 weeks. Computer predictions on the degree of reclamation were compared with measured changes in soluble salts, soluble boron, and SAR to soil depths of 274 cm. The differences between computed and measured field data were no more than the horizontal variations found in salt‐affected lands in this area and elsewhere. Also reported are predicted drainage water quality and a method for computing gypsum requirements of sodium‐affected profiles.

Modelling Multi‐Ion Transport in Saturated Soil and Parameter Estimation. I: Theory

“…An early attempt to model the solute movement in salt-affected soils was given by Tunji et al (1972). Their model considers cation exchange and precipitation-dissolution, but the processes are described in a rather simple way.…”

“…An extension of the model of Tunji et al (1972) was provided by Robbins et al (1980a,b). These authors considered more ionic species in the soil solution and extended the application range of the model.…”

Agriculture, irrigation, and drainage on the west side of the San Joaquin Valley, California: Unified perspective on hydrogeology, geochemistry and management

“…Wetland losses in California, 1850-1977(National Research Council, 1989 , 1926-1972(From Belitz, 1990 …”

A Combined Salt Transport‐Chemical Equilibrium Model for Calcareous and Gypsiferous Soils

“…Gypsum models (Dutt et al, 1972b;Tanji, 1969) to predict solution composition and concentration effects on CaSO4 solubility. A detailed description of Ca-SO4-HCO3-0133 interactions in solution is given by Nakayama (1969) and provides an invaluable overview of the combined lime and gypsum interactions in soil-water systems.Oster and Rhoades (1975) predicted irrigation drainage water chemical composition for long-term irrigation management with a steady-state chemistry and water flow model that assumes the presence of lime and gypsum.-Using a plate model for water flow and assuming that leaching takes place at field capacity, Tanji et al (1972) simulated the reclamation of soils high in soluble salts and soluble boron. Cation exchange and gypsum solubility were considered, whereas lime was not.…”

“…Oster and Rhoades (1975) predicted irrigation drainage water chemical composition for long-term irrigation management with a steady-state chemistry and water flow model that assumes the presence of lime and gypsum.-Using a plate model for water flow and assuming that leaching takes place at field capacity, Tanji et al (1972) simulated the reclamation of soils high in soluble salts and soluble boron. Cation exchange and gypsum solubility were considered, whereas lime was not.…”