Evaluating the Effects of Grain for Green policy through the landscape change: A Case Study in Gannan region, China

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Xu, Nuanyin^1,2 ; Sun, Siqi^2 ; Guo, Luo^2

School of Urban Planning and Design, 518055 Peking University, Shenzhen, China^1

College of Life and Environmental Sciences, Minzu University of China, Beijing

100081, China^2

关键词: Barrier functions;    Decision supports;    Ecological protection;    Geographic information technologies;    Human interference;    Landscape changes;    Landscape pattern;    Rational layouts;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/5/052008/pdf
DOI  :  10.1088/1755-1315/189/5/052008

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Gannan region, an important ecological barrier in the Gan Jiang River basin, is a typical southern mountain-hill area in Jiangxi Province, China, and its ecological protection is of great significance. In this study, using data of 5-year intervals from 2000 to 2015, the landscape change in the Gannan region was investigated through the application of remote sensing, geographic information technology, and spatial statistical methods. The results show that (1) The landscape pattern of Gannan region tends to be fragmented and decentralized, the landscape shape tends to be complex, and the human interference becomes more difficult. (2) Forest is the main land type in the Gannan region and decreased over the 15 years of investigation from 3094200 ha to 3068200 ha. (3) The area of farmland was rising before 2010, and then drops rapidly. Grassland shows the opposite trend to farmland, which shows the effectiveness of the Grain for Green policy. This study provides a theoretical basis and a decision support mechanism for the rational layout and protection of ecological land in Gannan region. The results could lead to improved ecological barrier functions of southern hilly region.