YU Hualong,CHEN Qingfeng,TIAN Chao,et al.Eco-Spatial Characteristics and Risk Evaluation of Land Use Based on Landscape Structure—Taking Huailai County as An Example[J].Research of Soil and Water Conservation,2016,23(03):155-163.
基于景观结构的土地利用生态空间特征及风险评估——以怀来县为例
- Title:
- Eco-Spatial Characteristics and Risk Evaluation of Land Use Based on Landscape Structure—Taking Huailai County as An Example
- 分类号:
- F301.24
- 摘要:
- 根据怀来县1995年、2003年、2010年3期遥感解译土地利用数据，利用景观损失度指数和景观脆弱度指数构建景观意义上的生态风险指数，应用Geoda，GS+以及ArcGIS等软件，将统计学方法与空间统计学方法（空间自相关）相结合，探讨怀来县景观生态风险的空间分布和变化特征。结果表明：研究期间各地类面积变化较为明显，耕地、水域以及未利用地等自然景观面积下降。建设用地和园地面积增加且表现出集中连片趋势，景观破碎度和景观分离度略有下降；整体上，怀来县生态风险呈现明显的圈层结构，主要由怀来县中部逐步向外降低。高生态风险区主要集中于沙城镇、土木镇以及孙庄子乡等地，1995—2003年生态风险等级上升的面积为96 698.25 hm2。2003—2010年生态风险上升面积明显减少，但高、较高风险区面积总体上仍趋于上升。研究结果为保障县域土地利用生态安全、制定合理的生态风险管理对策提供决策依据。
- Abstract:
- We built an ecological risk index from the view of the landscape based on landscape damage index and landscape fragile index utilizing the remote sensing images of Huailai County in 1995, 2003 and 2010. With the Geoda, GS+ and ArcGIS, we combined the statistical methods and spatial statistical methods (spatial autocorrelation) to explore the spatial distribution and the characteristic of variation of ecological risk of the landscape in Huailai County. The results showed that the area of each kind of land type varied obviously, while the natural landscapes such as cultivated land, water area and unutilized land declined quickly, on the contrary, the building area and park area increased with a concentrated trend, also the landscape fragile index and the landscape isolation index showed the lower value. On the whole, the ecological risk of Huailai County presented a layer structure with a higher risk in the center, especially in Shacheng Town, Tumu Town and Sunzhuangzi Town, the risks were the highest. The land area with a higher ecological risk was 96 698.25 hm2 in the period from 1995 to 2003, while the area decreased significantly during the period from 2003 to 2010 with the upward tendency of the area of high risk region and higher risk region on the whole level. The results could provide decision basis for guaranteeing the ecological safety of land use at county level and making the reasonable management strategy of ecological risk.
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备注/Memo
收稿日期:2015-06-19;改回日期:2015-06-29。
基金项目:河北省高等学校科学技术研究优秀青年资助项目（Y2012015）；河北省科技厅平台项目（13967502D）
作者简介:于化龙(1990-),男,河北张家口人,硕士研究生,研究方向为土壤与土地资源持续利用。E-mail:61835539@qq.com
通讯作者:陈亚恒(1973-),男,河北顺平人,博士,副教授,主要从事土地整理、土地评价、土地规划研究。E-mail:chenyaheng@126.com