title: [Landscape change and its spatial driving force of farmlands in Wenchuan County of Min-jiang River upper reach].
abstract: Based on remote sensing images and geographic information system, and by using landscape metrics and Kappa coefficient, this paper studied the farmland landscape change in Wenchuan County of Minjiang River upper reach. A logistic regression model was used to analyze the driving forces of this change, with elevation, gradient, aspect, and the distances to road, river and settlement as the affecting factors. The results showed that from 1974 to 2000, the farmland area in Wenchuan County kept increasing, with the greatest increment in 1974-1986. In 1986-2000, farmland area had no evident increase, but converted with other landscape types frequently and had an evident spatial position change, especially in the period from 1994 to 2000. Such a farmland change was mainly driven by policy, and the spatial driving forces differed in different periods.
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shengyang 110016, China. lium79@163.com
authors.forename: Miao
authors.initials: M
authors.lastname: Liu
authors.forename: Yuan-Man
authors.initials: YM
authors.lastname: Hu
authors.forename: Yu
authors.initials: Y
authors.lastname: Chang
authors.forename: Ren-Cang
authors.initials: RC
authors.lastname: Bu
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
mesh_terms: D002681:China; D003247:Conservation of Natural Resources; D018556:Crops, Agricultural / Q000254:growth & development*; D017753:Ecosystem; D004777:Environment; D040362:Geographic Information Systems; D016015:Logistic Models; D006109:Poaceae / Q000254:growth & development*; D045483:Rivers; D017215:Satellite Communications; D012987:Soil / Q000032:analysis; D014197:Trees / Q000254:growth & development*
chemical_list: D012987:Soil