摘要
水土流失同降雨及降雨前土壤湿度关系密切。坡耕地产生坡面流失的临界雨强约为4mm/10min,降雨量为12.5mm;从中雨至大暴雨,雨型每增加一级,土壤流失量将翻一番;水土流失量同侵蚀雨量呈极显著的线性关系;地表径流量同降雨前0—30cm的土壤湿度因子成正比,冲刷量则与此成反相关。
Water and soil losses bore a close relationship with the rainfall and the soil moisture before raining. The critical rainfall intensity for sloping field to produce surface erosion was 4mm/10min, and the critical rainfall 12.5mm. The soil loss doubled as the rain-type rose one level from moderate rain to cloudburst soil erosion appeared notably in direct proportion to erosive rainfall. The amount of runoff was in direct proportion but the quantity of soil loss in inverse proportion to 0—30cm soil moisture factor before raining.
出处
《土壤学报》
CAS
CSCD
北大核心
1992年第1期94-103,共10页
Acta Pedologica Sinica
关键词
士量
土壤
湿度因子
土壤侵蚀
Erosive rainfall, Soil moisture factor, Water and soil losses
