Effects of water quality and PAM application rate on the control of soil erosion, water infiltration and runoff for different soil textures measured in a rainfall simulator

摘要: The effects of different rates polyacrylamide – PAM (0, 2.0, and 6.0 kg ha−1) applied with a sprinkler using wastewater (electrical conductivity EC 1.9 dS m−1) freshwater (EC 0.5 dS m−1) on runoff, soil erosion infiltration were studied in laboratory rainfall simulator. Three textures (sandy loam, silty clay loam) three irrigations used but only the first contained PAM. At heavier textures, higher application (≥6.0 kg ha−1) effective at enhancing final rate reducing runoff erosion. For loam 2.0 kg ha−1 reduced 28 25% wastewater, respectively, was not second irrigation when wastewater. freshwater, 6.0 kg ha−1 required to reduce events, while 32 46%, event, however, reduction did occur following events. threshold value where initiated slope for compared freshwater. This probably because became bound solids available stabilise surface.