Sandy desertification change and its driving forces in western Jilin Province, North China.
This paper investigates the sandy desertification change between 1986 and 2000 in the western Jilin province, North China. Land use and land cover data were obtained from Landsat TM data by using a supervised classification approach. We summarized the total area of desertified land by each county, as well as the area for each of the four categories of desertified land. The changes of different types of land use and land cover between 1986 and 2000 were calculated and analyzed. Taking Tongyu and Qianan as examples, both human and natural driving forces of the sandy desertification were analyzed. Our analyses indicate that the material sources and windy, warm and dry climate are the immanent causes of potential land desertification, while the irrational human activities, such as deforestation, reclaiming and grazing in the grassland, are the external causes of potential land desertification. However, rational human activities, such as planting trees and restoring grassland can reverse the land desertification process. Furthermore, the countermeasures and suggestions for the sustainable development in ecotone between agriculture and animal husbandry in North China are put forward.
Fang
Li
L
Department of RS and GIS, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Science, 3195 Weishan Road, 130012 Changchun, China. lfwhy@neigae.ac.cn
Bai
Zhang
Z
Wei
Su
S
Yanfen
He
H
Zongming
Wang
W
Kaishan
Song
S
Dianwei
Liu
L
Zhiming
Liu
L
D000383:Agriculture; D000818:Animals; D002681:China; D002980:Climate; D003247:Conservation of Natural Resources; D017753:Ecosystem; D004784:Environmental Monitoring; D006801:Humans; D015203:Reproducibility of Results; D017215:Satellite Communications; D012822:Silicon Dioxide
D012822:Silicon Dioxide