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中国沙漠 ›› 2003, Vol. 23 ›› Issue (4): 403-407.

• 研究论文 • 上一篇    下一篇

定西地区1995-2000年间土壤侵蚀的变化与治理对策

颉耀文1, 陈怀录1, 李欣鹃2   

  1. 1. 兰州大学 资源环境学院, 甘肃 兰州 730000;
    2. 甘肃省水土保持科学研究所, 甘肃 兰州 730000
  • 收稿日期:2001-12-10 修回日期:2002-05-29 出版日期:2003-08-20 发布日期:2003-08-20
  • 作者简介:颉耀文(1969-),男(汉族),甘肃甘谷县人,副教授,在职博士生,从事3S应用方面的教学与研究工作。

Dynamics and Controlling Countermeasures of Soil Erosion in Dingxi District,Gansu Province

XIE Yao-wen1, CHEN Huai-lu1, LI Xin-juan2   

  1. 1. School of Resources and Environment in Lanzhou University, Lanzhou 730000, China;
    2. Soil Conservation Institute of Gansu Province, Lanzhou 730000, China
  • Received:2001-12-10 Revised:2002-05-29 Online:2003-08-20 Published:2003-08-20

摘要: 严重的土壤侵蚀是定西地区生态环境恶化的主要原因,也是社会经济发展的主要限制性因素之一。利用数字遥感影像人机交互解译技术对1995年和2000年的土壤侵蚀进行调查,结果显示5 a来定西地区土壤侵蚀面积减少1 446.39 km2,减少了7.36%。其中轻度侵蚀减少5.63%,中度减少1.4%,强度减少0.03%,极强度减少0.30%。侵蚀程度整体上有所减轻,表明水土保持工作取得了一定成效。但土壤侵蚀面积仍然占土地总面积的80%以上,而且强度和极强度侵蚀面积减少不明显,土壤侵蚀仍然十分严重,水土保持的任务还相当艰巨。积极开展水土保持是定西地区实现山川秀美、脱贫致富和可持续发展的根本途径。

关键词: 定西地区, 土壤侵蚀, 水土保持

Abstract: Severe soil erosion is the main cause of environment deterioration in Dingxi District of Gansu Province,and it is also one of the main limit factors on the development of this area.After a comparison of investigation results between 1995 and 2000,it is found that in the 5 years,the soil erosion area has been reduced by 1 446.39 km2,or 7.36%,among which,5.63% is light degree erosion,1.4% is middle degree erosion,0.03% is intensive degree erosion and 0.30% is very intensive degree erosion.As a whole,the degree of soil erosion has been alleviated a little.These show that the controlling countermeasures have attained some achievements.But the erosion area is still at 80% of the district area,and the reduced intensive and very intensive erosion areas are very small,these imply that the soil erosion in this region is still severe and the task of soil conservation is still hard.Some concrete methods for treating soil erosion in this region are presented in this paper.

Key words: Dingxi District, soil erosion, soil conservation

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