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1基本概况1.1自然地理河南省地处南北气候和山区向平原的双重过渡地带,地跨黄、淮、江、海四大水系,境内有太行、伏牛、大别、桐柏四大山系。气候方面,受季风影响,降雨年内年际分布极不均匀,全年降雨量的60%～70%集中在6-9月,暴雨频次多,强度大,历时短,地表产流迅猛;地理方面,由于山势陡峻,山区向平原过渡地带短窄,雨水汇流快,流速大,冲刷力强。特殊的地理气候因素造成我省水土流失十分严重。全省山丘区水土流失面积达6.06万
1 Basic 1.1 Natural Geography Henan Province is located in the northern and southern climate and mountainous areas to the plains of the dual transition zone, across the Yellow River, Huai, Jiang, sea four major rivers in the territory of the Taihang, barberry, Dabie, Tongbai four mountain system. In the aspect of climate, due to the monsoon, the annual distribution of rainfall during the year was very uneven. 60% -70% of the rainfall in the whole year concentrated in June-September. The frequency of heavy rainfall was heavy and the duration was short. The surface runoff was rapid. Due to the steep mountain, the transition zone between mountain and plain is short and short, the rainwater converges fast, the flow velocity is large and the erosion force is strong. Special geographical and climatic factors cause soil erosion in our province is very serious. The hillside area of soil erosion area of 60,600