摘要
本研究利用太湖区代表站３０年和４３个一般站２５年的降雨资料，改进和完善了降雨侵蚀力新算法，使之与经典法达到９０％的一致性，查清了该区降雨侵蚀力时空变化持证，并编制出全区阵雨侵蚀力（Ｒ）值分布图。同时，还时Ｒ值在水土保持、耕作制度变革和防洪减灾中的应用，尤其对１９９１年特大洪涝灾害的根本原因，作了讨论。太湖区Ｒ值较大，不可忽视水土保持，做好山区、坡耕地的水土保持，是防洪减灾最长久有效的根本措施。
Based on the 30-years' rainfall data of a repre-sentative meterological station and the 25-years'rainfall data of 43 hydrometric stations in the Taihu Lake reglon,the new algorIthn of rainfall erosivity factor(R-value)was improved which showed a coincidence with the classical algorithm at the rdte of 9O% of the temporal and spacial variation characteris-tics of R-value in the Taihu Lake region or Changjiang biver basin,and the R-value(25-years')distribution map in the whole region was compiled as well.Applicatlon of R-value to soil and water conservation,tillage system transformation,flood prevention and disaster mitigation and,in particular,the fundamental reason for the big flood disaster in 1991 in Taihu Lake region were discussed.Owing to the larger R-value in this region, the soil conservation should not be ignored.Adopting soil conservation measures in the mountainous ar-eas,especially for the slope land,constitutes a basically per-manent and effective method for flood prevention and disaster mitigation
出处
《农村生态环境》
CSCD
1994年第4期1-6,共6页
Rural Eco-Environment
基金
国家自然科学基金
关键词
降雨侵蚀力
流失量监测
防洪减灾
水土保持
rainfall erosivity factor ,soil loss monitor-ing,flood prevention and disaster mitigation
