| 降雨及土壤湿度对水土流失的影响 |
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| 引用本文： | 吕甚悟,李君莲.降雨及土壤湿度对水土流失的影响[J].土壤学报,1992,29(1):94-103. |
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| 作者姓名： | 吕甚悟 李君莲 |
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| 作者单位： | 四川省南充县农业局, 637100;四川省南充县农业局, 637100 |
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| 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。
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| 关 键 词： | 士量 土壤 湿度因子 土壤侵蚀 |
INFLUENCE OF RAINFALL AND SOIL WETNESS ON WATER AND SOIL LOSSES |
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| L&#; Shenwu and Li Junlian.INFLUENCE OF RAINFALL AND SOIL WETNESS ON WATER AND SOIL LOSSES[J].Acta Pedologica Sinica,1992,29(1):94-103. |
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| Authors: | L&#; Shenwu and Li Junlian |
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| Institution: | Bureau of Agriculture. Nanchong County, Sichuan province, 637100;Bureau of Agriculture. Nanchong County, Sichuan province, 637100 |
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| Abstract: | 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 4 mm/10 min, and the critical rainfall 12.5 mm. 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 0-30 cm soil moisture factor before raining. |
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| Keywords: | Erosive rainfall Soil moisture factor Water and soil lossea |
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