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针对2012年陕北省佳县“7·27”特大暴雨侵蚀灾害,以暴雨中心区(王家砭镇)受灾最严重的行政村为对象,调查了“7·27”特大暴雨中道路、河岸、河道、房屋建筑、坡耕地、退耕林地、退耕草地等的侵蚀灾害情况。选取不同恢复措施的典型坡面,量测了地表植被、地形、土壤结皮等状况和“7·27”暴雨侵蚀产生的土壤侵蚀量。重点调查了不同生态恢复措施与恢复效果在该次暴雨中的抗侵蚀作用。对“7·27”特大暴雨侵蚀灾害的原因进行了初步分析。结果表明,植被盖度、植被物种多样性、坡度以及土壤生物结皮对于暴雨侵蚀的防御具有重要影响。
Aiming at the serious rainstorm erosion in Jia County and “7 · 27” in northern Shaanxi Province in 2012, this study investigated the “27.7” heavy rainfall in the administrative villages worst hit by rainstorm center (Wangjiatong Town) Road, river bank, river course, house building, sloping cropland, returning farmland to forest land and returning farmland to grassland. The typical slope with different restoration measures was selected to measure the quantity of soil erosion due to the surface vegetation, topography, soil crust and other conditions and the rainstorm eroded by “27 · 27”. Focus on investigating the different ecological restoration measures and restoration effect in the heavy rain in the anti-erosion effect. A preliminary analysis of the causes of the “July 27” heavy rainfall erosion disaster. The results show that vegetation cover, vegetation species diversity, slope and soil biological crust play an important role in the prevention of rainstorm erosion.