黄河中游(青海贵德至河南沁河口)水土流失区域,除内蒙伊盟及旧“宁、绥”冲积平原外,大邮居黄土高原以内。总面积约20余万平方公里。地势约白海拔400—2,500米,由西北向东南逐渐倾斜,气候由干燥而渐趋湿润,黄土颗粒由粗而细。

Coil erosion, with its inseparahle results of recurinQ flnndg and draughts which have long brought disastem and miseries to the people of North China, has ever been the foremost problem in the fundamental control of tine fellow River. In recent yearn, our government has paid great efforts in trying to carry out, in the shortest time possible, a soil conservation project in the middle reaches of that great river where the soil erosion has been known to be in its worst form.