HUANG Hui-ping, ZHANG Cen, HAN Yu-ping. Ecosystem Health Assessment of Central Ctansu Loess Plateau Based on 3S -- A Case Study of Yuzhong County, Ctansu Province[J]. Bulletin of Soiland Water Conservation, 2009, 28(4): 205-208.
HUANG Hui-ping, ZHANG Cen, HAN Yu-ping. Ecosystem Health Assessment of Central Ctansu Loess Plateau Based on 3S -- A Case Study of Yuzhong County, Ctansu Province[J]. Bulletin of Soiland Water Conservation, 2009, 28(4): 205-208.DOI:
thematic raster layers of each evaluation factor are established based on DEM
survey data
remote sensing images
and 3S technologies.From the humanistic and natural point of view
vigor
organization
load
resilience
ecosystems maintenance
external input
and human health are chosen as the assessing elements based on the method of AHP.T he assessing result is classified into five classes: very healthy state
healthy state
sub healthy state
nor-healthy state
and morbidity state. In the end
the following conclusion is drawn: the area of nor-healthy state makes up 40>-50> of Yuzhong County
which indicates that the ecosystem healthy state declined from 1991 to 2006.