论文部分内容阅读
据1986年10月上旬在西安召开的黄河中游水土保持委员会第二次委员会议获悉,进入八十年代以来,黄河中上游地区水土保持工作取得突破性进展,入黄泥沙平均每年减少2亿多吨。根据黄河中上游七省区提供的资料和典型抽样分析,“六五”期间共完成各项水保措施有效面积27 000平方公里,平均年治理进度为1.3％,比1979年前高出一倍。黄河中上游地
According to the second committee meeting of Soil and Water Conservation Commission of the middle reaches of the Yellow River held in Xi’an in early October 1986, it was learned that since the 1980s, breakthroughs have been made in soil and water conservation in the middle and upper reaches of the Yellow River. The average amount of sediment entering the Yellow River has been reduced by more than 200 million Ton. According to the information and typical sampling analysis provided by the seven provinces in the middle and upper reaches of the Yellow River, an effective area of 27,000 square kilometers of water and soil conservation measures was completed during the “Sixth Five-Year Plan” period, with an average annual improvement rate of 1.3%, twice as high as before 1979 . The middle and upper reaches of the Yellow River