摘要
Modeling geochemistry of the studied Bahtim catchment in Egypt provides a powerful tool for untangling various connections and feedbacks between atmospheric inputs, vegetation, soil and hydrology within the system. The biogeochemical PROFILE model was used to study the integrated environmental monitoring of different environmental compartments as well as calculating geochemical weathering rate. The model is in steady state and includes multi-layers which have the mineralogical, physical and chemical attributes measured for individual soil layers. In this study, the base cations (Ca+{2+}, Mg+{2+}, Na++, K++) are produced from the minerals through chemical weathering. The total chemical weathering rate of base cations is 6.5 keq+{-1}·ha+{-1}·a+{-1}. In addition, the output results indicate that a small amount of dark minerals like hornblende, pyroxene and plagioclase largely contribute the field weathering rate in Egyptian Vertisols.
Modeling geochemistry of the studied Bahtim catchment in Egypt provides a powerful tool for untangling various connections and feedbacks between atmospheric inputs, vegetation, soil and hydrology within the system. The biogeochemical PROFILE model was used to study the integrated environmental monitoring of different environmental compartments as well as calculating geochemical weathering rate. The model is in steady state and includes multi-layers which have the mineralogical, physical and chemical attributes measured for individual soil layers. In this study, the base cations (Ca+{2+}, Mg+{2+}, Na++, K++) are produced from the minerals through chemical weathering. The total chemical weathering rate of base cations is 6.5 keq+{-1}·ha+{-1}·a+{-1}. In addition, the output results indicate that a small amount of dark minerals like hornblende, pyroxene and plagioclase largely contribute the field weathering rate in Egyptian Vertisols.
基金
ThisworkwasfundedbytheAcademyofScientificResearchandTechnologyinEgyptandtheNationalResearchCentre ,Cairo ,Egypt.
