摘要
该研究以流域为单元，选定１７个中等流域，研究各流域地质、地貌、土壤、森林覆盖率、植被覆盖率、降雨量、旱坡耕地垦殖率、土壤垦殖率、人均占有粮食、人均纯收入、人口文化素质、人均乡镇企业产值、人均农业产值以及人均国民生产总值等多因素与河流输沙量的关系，建立了各单因素及复因素与输沙关系的数学模型。研究结果表明，影响河流输沙最显著的因素为旱坡耕地垦殖率、森林覆盖率和人口密度，其次为人均占有粮食和土壤类型。河流输少量与旱坡耕地垦殖率、人口密度成正比，与森林覆盖率、人均占有粮食成反比。
This paper take the valley as a unit,select 17 middle valleies research much factors withrelation to sediment discharge of rivers. The factors included geology,land feature,soil,fores coverdegree,plant cover degree,reclaim and cultivate waste land of dry farm,per capita output of grain,per capita income of economy,people’s cultural level, per capita output value of town and townshipenterprises,per capita output agriculture and per capita GNP at all,the paper established mathemati-cal model for every single and compound factors with sediment discharge of rivers,the results thatthe best remarkble factor of influencing sediment disch arge is cultivate waste land of dry farm ,for-est cover degree,and populatiom density,secondly that is per capita output of grain and type of soil.The sediment discharge of rivers with cultivated waste land of dry farm,population density are indirect proportion,it with forest cover degree,per capita output of grain are inverse proportion.
出处
《水土保持学报》
CSCD
北大核心
1994年第4期17-24,共8页
Journal of Soil and Water Conservation
关键词
水土流失
综合评价
贵州山区
soil and water loss nature society economy valley synthetical eval-uation mathematical model quantitative forecast
