Role of monsoon rain on concentrations and dispersion patterns of metal pollutants in sediments and soils of the Ganga Plain, India

摘要: Monsoon rain causes large scale sediment-water movement and reworking of sediments the Ganga Plain which is one largest fluvial systems on Earth. Geomorphology drainage type combined with sedimentation processes play a substantial role dispersion transport patterns metals bound to soils. The study area Kanpur-Unnao industrial region in has been divided into five independent geochemical domains basis sediment-geomorphic, hydrological characters. monsoon hydrography physico-chemical parameters (pH, conductivity) river urban drain waters prominent regulating concentrations behaviour aquatic system Plain. Values pH specific electrical conductivity water decrease whereas those increase post-monsoon period. reduces contents Co, C-org, Cr, Fe Ni enhances Cd, Sn Zn In soils, it Al, Fe, Mn These changes vary from metal domain other. An few soils pre- periods indicates that these were mobilized overflooding rich waste-water onto fields during high stage also by through sheet floods time. Despite concentrations, each remain similar both indicate sediment-geomorphic operating for mobilization are persistent even after