贵州省赤水河流域土地利用/覆被变化及驱动力分析

LAND USE/COVER CHANGE AND ITS DRIVER FACTOR IN CHISHUI RIVER BASIN OF GUIZHOU PROVINCE

以遥感影像与土地利用/覆被详查资料为主要数据,在Arc-GIS支持下研究贵州省赤水河流域2000-2010年间土地利用/覆被变化,分析土地利用结构变化和动态变化特征,阐明耕地变化的驱动因素.结果表明：2000-2010年间,耕地（旱地、水田）面积减少51.84 km2;园地、水域、灌木林和裸岩面积变化程度较小;草丛、稀疏植被和森林面积分别增加了1.98 km2、2.19 km2和12.85 km2;其中,建设用地年变化率与动态变化最显著分别为10.98％、13.18％,面积增加了33.40 km2.研究认为,除自然因素外,政府政策、工业化、城镇化等人文因素是影响流域土地利用的主要驱动力.

Based on detailed surveys of land use and remote sensing image data as main information source,with the support of the geographical information system （GIS） techniques to study land use/land cover change of Guizhou Chishui basin from 2000 to 2010,the land use change rate and dynamic change degree were analyzed,and the driving factors of cultivated land change were illustrated.It is concluded that,in the 10 years from 2000 to 2010,cultivated land reduced （upland and paddy） field area of 51.84 km2,orchard land,waters,shrubbery and bare rock area were little changes,grass increased,sparse vegetation and forest area in creased 1.98 km2 、2.19 km2 and 12.85 km2.Among them,the construction land dynamic change rate and the most significant were respectively 10.98％ and 13.18％,with an increase of 33.40 km2.Studies suggest that in addition to the natural factors,cultural factors such as government policy,the population growth are the main driving force affecting the watershed land use.