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亚洲东南部地区(包括日本)属季风带,在雨季和台风期间,集中降雨会引起大量的土壤侵蚀,从而导致农作物产量下降.同时造成周围区域土壤的灾难性流失.1976至1986年共十一年间,对政府项目实施地点的坡耕地进行了详细的调查,以研究耕作方式、植物的生年、土壤性质、降雨量、地面雨水流动和土壤侵蚀.在本文,试图对以上诸因素与土壤侵蚀之间的关系加以分析.在烟草区中,调查开始时,烟草都是按相对等高线垂直垄进行种植的,每年均引起大量的土壤侵蚀.所观察到的土壤侵蚀量几乎可以和裸露土壤的侵蚀量相比.在观察的五年期间,平均年侵蚀量以裸露地区为最大,其次是烟草地,然后是牧场,最后是葡萄园.裸露地区和烟草地的土壤侵蚀年年超过日本统一的年允许限度标准(10m~3/公顷).检查其季节性变化,雨季的土壤侵蚀量最大,在各种植区.雨季的土壤侵蚀量占所检测的年侵蚀量的60～80%.
In southeastern Asia (including Japan), which is a monsoon zone, concentrated rainfall during the rainy season and typhoon caused substantial soil erosion, resulting in a decline in crop yields and catastrophic soil loss in the surrounding areas. From 1976 to 1986, eleven During the year, a detailed investigation was carried out on sloping farmland at the site of government projects to study the farming practices, plant life, soil properties, rainfall, groundwater flow and soil erosion.In this paper, In the tobacco area, at the start of the survey, tobacco was planted with vertical ridges of relative contour lines and caused substantial soil erosion each year.The amount of soil erosion observed was comparable to that of bare soil During the five years observed, the average annual erosion was highest in bare areas, followed by tobacco lands, then pastures, and finally vineyards. Soil erosion in exposed and tobacco areas exceeded that of Japanese uniforms annually Annual allowable limit (10m ~ 3 / ha) .Check the seasonal changes, the highest soil erosion during the rainy season, in all plantation areas. The soil erosion during the rainy season accounted for 60 to 80% of the amount of erosion measured.