Simulating Nitrate Leaching Profiles in a Highly Permeable Vadose Zone
作者: R. ChesnauxD. M. Allen
作者单位: 1Department of Earth Sciences, Simon Fraser University
刊名: Environmental Modeling & Assessment, 2008, Vol.13 (4), pp.527-539
来源数据库: Springer Journal
DOI: 10.1007/s10666-007-9116-4
关键词: Nitrate leachingVadose zoneAbbotsford-Sumas aquiferUnsaturated flowInfiltration frontCharacteristic curves
英文摘要: Abstract(#br)An approach is developed to simulate leaching of a dissolved chemical constituent in the vadose zone of an aquifer. Specifically, nitrate loading at the water table for different water table depths, for a range of aquifer permeability values, and for different cases of heterogeneity of the aquifer, are considered. Models from the literature are first used to derive soil–water characteristic curves (water retention and hydraulic conductivity) from a grain size distribution curve for unsaturated conditions. Given infiltration from the surface, the initial conditions for the chemical concentration, and the water content profile, leaching of the chemical in the vadose zone is simulated as a function of both time and depth. The methodology is illustrated for a permeable aquifer....
全文获取路径: Springer  (合作)
影响因子:0.977 (2012)