【摘要】 晋西沿黄地区是黄河中游水土流失最严重的地区之一。20世纪90年代末水土流失面积为20777.0km~2,占研究区土地总面积的79.30％,较70年代末水土流失面积17 912.54 km~2增加了2 864.46km~2,平均每年以143.23 km~2的速度在扩展。水土流失造成该区可利用土地面积减少、土地生产力下降、农田水利设施被破坏、生态失调等危害。为此,本文依据研究区水土流失的现状及危害,提出了以山西省可持续发展为目标的水土流失综合防治对策。更多还原

【Abstract】 Soil erosion is one of the most serious eco-environment problems, which limits the development of society and economy along the Yellow River of western Shanxi Province. In this region, water erosion land covers 20 777 km2 and it is accounting about 79. 30% of the total land area in the 1990s, while water erosion land covers 17 912. 54km2 and it is about 68. 37% of the total land area in the 1970s. In other words, the increasing rate of soil erosion was 143. 23 km2 per year in recent 20 years. Soil erosion resulted in some negative impact on the society and economy in study region, such as cultivated land area reduction, land productive potentialities declining, water conservancy facilities destroying, ecological environment degradation and so on. Finally, some strategies of ecological construction for preventing water and soil loss are put forward according to the physical condition of this region.更多还原