Wang Ying, Li Xiangmei, Li Jiangfeng
School of Public Administration, China University of Geosciences, Wuhan, Hubei 430074, China.
School of Environment, Resource and International Trade, Hubei University of Economics, Wuhan, Hubei 430205, China.
ScientificWorldJournal. 2014;2014:794323. doi: 10.1155/2014/794323. Epub 2014 Aug 28.
This research examined the spatiotemporal patterns of land-use/cover and the dynamics of ecological capacity in response to land-use/cover change in Wuhan city, central China. The data were derived from five years' remote-sensed images, that is, 1990, 1995, 2000, 2005, and 2010. This paper used an integrated approach of remote sensing and GIS techniques, ecological capacity and the bilateral dynamic degree models. The results are as follows. (1) From 1990 to 2010, remarkable changes in land-use/cover have occurred within the studied area, and the most prominent characteristics of the changes were continuous decline of arable land and rapid increase of built-up land. (2) The total ecological capacity dropped from 450.55 × 10(4) ghm(2) in 1990 to 447.35 × 10(4) ghm(2) in 2010. The eastern, western, and southern parts had higher ecological capacity whereas the northwestern hilly areas and the central district had lower ecological capacity. (3) Due to the conversion from arable land to built-up land, the ecological capacity losses during 1990-1995, 1995-2000, 2000-2005, and 2005-2010 were 155.52 × 10(2) ghm(2), 114.12 × 10(2) ghm(2), 455.48 × 10(2) ghm(2), and 325.26 × 10(2) ghm(2), respectively. The study would contribute to better understanding of the effects of land-use dynamics and the evolution of ecological capacity, which can provide scientific basis for land management and environment protection.
本研究探讨了中国中部武汉市土地利用/覆盖的时空格局以及生态容量响应土地利用/覆盖变化的动态情况。数据来源于1990年、1995年、2000年、2005年和2010年这五年的遥感影像。本文采用了遥感与地理信息系统技术、生态容量及双边动态度模型的综合方法。结果如下：（1）1990年至2010年期间，研究区域内土地利用/覆盖发生了显著变化，变化的最突出特征是耕地持续减少和建设用地迅速增加。（2）生态容量总量从1990年的450.55×10⁴ ghm²降至2010年的447.35×10⁴ ghm²。东部、西部和南部地区生态容量较高，而西北丘陵地区和中心城区生态容量较低。（3）由于耕地向建设用地的转变，1990 - 1995年、1995 - 2000年、2000 - 2005年和2005 - 2010年期间的生态容量损失分别为155.52×10² ghm²、114.12×10² ghm²、455.48×10² ghm²和325.26×10² ghm²。该研究将有助于更好地理解土地利用动态的影响以及生态容量的演变，可为土地管理和环境保护提供科学依据。
