Stochastic modeling of salt accumulation in the root zone due to capillary flux from brackish groundwater

摘要: [1] Groundwater can be a source of both water and salts in semiarid areas, therefore, capillary pressure-induced upward flow may cause root zone salinization. To identify which conditions result hazardous salt concentrations the zone, we combined mass balance equations for water, further assuming Poisson-distributed daily rainfall brackish groundwater quality. For fluxes (leaching, upflow, evapotranspiration), account osmotic effects dissolved using Van't Hoff's law. Root salinity depends on transport via flux evapotranspiration, concentrates zone. Both wet climate shallow lead to wetter conditions, combination with periodic enhances removal by leaching. climates, (concentrations) increases as is more (larger influence). dry deeper because drier less intermediate opposing push either way. almost linearly salinity. With simple analytical approximation, maximum related mean rate, leaching