江西省土地利用生态风险评价

Assessment of Ecological Risk for Jiangxi Province Based on Land Use

研究目的在于通过对江西省2000-2013年土地利用生态风险进行评价,绘制江西省生态风险分布格局,提出针对江西省不同风险区域的发展意见或建议,为江西省生态保护工作提供科学依据。所采用的研究方法为层次分析法和综合指数法。研究结果表明:12000-2013年间,江西省土地利用结构以林地为主,其次为耕地;工交建设用地在各分区均呈增长趋势,以鄱阳湖平原区和赣南区增长最为显著;22000-2013年间,江西省的土地利用生态风险处于较低风险等级,但呈上升趋势;2013年较2010年高风险等级分布面积在缩小,低与较低等级面积则在增加,风险等级面积分布趋于合理,江西省土地利用生态风险有所缓和。3鄱阳湖平原区的生态风险等级最高,生态风险最大,其次为赣中区;赣南、赣东和赣西区生态风险较小,但生态风险呈增长趋势;4高风险等级面积集中增加在城市及其周边地区,城市生态风险增加,江西省生态保护工作应将关注点转移到到城市生态安全上。

The purpose of this paper is to assess the ecological risk( ER) of Jiangxi Province based on land Use,and produce pictures of distribution of ecological risk levels so as to advise for different regions in Jiangxi. The methods used are the Analytic Hierarchy Process( AHP) and compositive index method. The results show that: 1In Jiangxi,woodland was the dominant land- use type,the farmland was the second. And the area of construction land increased in every subregion,especially in Poyang Lake Plain region and the South region of Jiangxi. 2The ERI of Jiangxi on land use were in low level in four times,but it showed an increasing tendency.The area of high ecological risk level in 2013 was less than in 2010,and the area of low ecological risk level in 2013 was more than in2010. It showed that ER of Jiangxi province on land use has been eased. 3The ERI of Poyang Lake plain region was the maximum,the middle region of Jiangxi was the second. The ERI were smaller in the South region,the Eastern region and the West region of Jiangxi,but it was on the rise. 4The area of high ecological risk level had been concentrated in the city and its surrounding areas,and the ecological risk of the city was increased. The ecological protection in Jiangxi should will shift the focus to ecological security of urban.