地理科学 ›› 2001, Vol. 21 ›› Issue (3): 236-241.doi: 10.13249/j.cnki.sgs.2001.03.236

• 论文 • 上一篇    下一篇

西南地区山地不同土地退化类型特征及调控途径

张建平   

  1. 中国科学院、水利部成都山地灾害与环境研究所, 四川 成都 610041
  • 收稿日期:2000-07-29 修回日期:2000-11-22 出版日期:2001-05-20 发布日期:2001-05-20

Study on Land Degradation Characteristics of Different Types in Mountain Areas in Southwest China

ZHANG Jian-ping   

  1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu, Sichuan 610041
  • Received:2000-07-29 Revised:2000-11-22 Online:2001-05-20 Published:2001-05-20

摘要: 土地退化不仅是目前全球性的重大环境问题之一,而且也是重大的社会和经济问题之一。西南地区的土地退化是以水力侵蚀为主要动力形成的。文中简述了西南地区的土地退化状况,选择了4个(楚雄市、遂宁市,毕节地区及元谋县)山地不同土地退化类型进行分析,讨论了土地退化过程,提出了土地退化调控途径。

Abstract: Land degradation is not only a great environmental problem at present, but a great economic and social problem. Land degradation in southwest China is mainly formed by water erosion. This paper, briefly descibed the land degradation status (slight, moderate and severe degraded land area is respectively 188852.5, 48128.81 and 16.393.62 km2, and respectively makes up 14.30%,3.50% and 1.10% of the total area of southwest China)in southwest China, analyzed different land degradation types of 4 choosed areas(Chuxiong City in Yunnan Plateau(degraded area is 1159.44 km2 and makes up 26.17% of the total area), Suining City in hilly area in middle Sichuan Basin(degraded area is 3188.51 km2, makes up 59.93% of the total area), Bijie Prefecture in lime stone area in Guizhou Province(degraded area is 9055.30 km2, makes up 33.70% of the total area) and Yuanmou County in dry-hot valley in Yunnan Province (degraded area below 1350m of altitude is 1006.02 km2, makes up 70.15% of the total area)),discussed land degradation process(The land degradation process is under fragile eco-environment(great height difference, steep slope, frequent heavy rain and rainstorm),human unreasonable social-economic activity (reclaim slope land, cut forest, over grazing, etc.) caused the process of land degradation), proposed ways(prevention and control of land degradation by the law; strictly control population with the N range of the equation: 0.2113K

中图分类号: 

  • F323.211