| 基于土地利用变化的江汉平原景观生态风险时空分异特征分析 |
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| 引用本文： | 陈 斌,,徐尚昭,,周阳阳,,王宏志,杨顶田.基于土地利用变化的江汉平原景观生态风险时空分异特征分析[J].水土保持研究,2022,29(5):228-234,243. |
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| 作者姓名： | 陈 斌 徐尚昭 周阳阳 王宏志 杨顶田 |
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| 作者单位： | (1.核工业二九○研究所, 广东省环境保护核辐射追踪研究重点实验室, 广东 韶关 512029; 2.广东省放射性生态环境保护工程技术研究中心, 广东 韶关 512029; 3.华中师范大学 城市与环境科学学院, 武汉 430079; 4.中国科学院 南海海洋研究所, 广东省海洋遥感重点实验室, 广州 510301) |
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| 摘 要： | 土地利用/覆被变化能够在一定程度上表征城市景观生态风险空间分异特征。研究基于湖北省江汉平原2000—2015年(2000年、2005年、2010年、2015年)4期土地利用遥感监测数据及县级行政单元区划数据,采用全局自相关模型和地统计空间分析等方法,定量揭示了江汉平原土地利用水平与景观生态风险之间的空间耦合关系。研究表明:(1)2000—2015年江汉平原土地利用类型主要以耕地、水域和建设用地为主,土地转移类型主要以耕地向建设用地转移为主。(2)2000—2015年江汉平原景观生态风险时空演变差异显著,冷点、次冷点数量增加,次热点和热点均呈现先增加后减少态势。生态风险聚集的高值区主要分布在江汉平原东南部洪湖市,低风险区主要分布在江汉平原西部当阳市及松滋市。(3)2000—2015年江汉平原低生态风险区面积呈现逐渐减小态势,从2000年的2 015.63 km2,较少到2015年的1 960.87 km2。中风险区面积呈现先增加后减少的态势,其中2005—2010年增加幅度最大,达到了2 061.26 km2。(4)2000—2005年江汉平原低生态风险重心整体转移不明显,主要集中分布在江汉平原西北部,较低生态风险重心转移空间跨度最大,向西转移了79.80 km。中风险区主要向东北方向转移,较高风险区和高风险区重心主要集中分布在江汉平原东南部洪湖市,且呈现向东北方向转移的趋势,其中较高风险区重心转移速度明显快于高风险区。本研究成果可为城市内部土地利用开发与景观生态风险评价提供科学依据和理论参考。
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| 关 键 词： | 土地利用 景观生态风险 江汉平原 全局自相关模型 |
Assessment of Landscape Ecological Risk in Jianghan Plain Area Based on Land Use Change |
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| CHEN Bin,,XU sShangzhao,,ZHOU Yangyang,,WANG Hongzhi,YANG Dingtian.Assessment of Landscape Ecological Risk in Jianghan Plain Area Based on Land Use Change[J].Research of Soil and Water Conservation,2022,29(5):228-234,243. |
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| Authors: | CHEN Bin XU sShangzhao ZHOU Yangyang WANG Hongzhi YANG Dingtian |
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| Affiliation: | (1.No.290 Research Institute, CNNC, Guangdong Provincial Key Laboratory of Environmental Protection and Nuclear Radiation Tracking Research, Shaoguan, Guangdong 512029, China; 2.Guangdong Provincial Engineering Technology Research Center of Radioactive Eco-environmental Protection, Shaoguan, Guangdong 512029, China; 3.College of Urban and Environmental Science, Central China Normal University, Wuhan 430079, China; 4.Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea......) |
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| Abstract: | Land use/cover change can characterize the spatial differentiation characteristics of urban landscape ecological risk. Based on the data from the four basic remote sensing surveys of land use in the Jianghan Plain from 2000 to 2015(2000, 2005, 2010, and 2015)and the zoning data of county-level administrative units in Hubei Province, we used global autocorrelation models and geostatistical analysis methods to quantitatively reveal the spatial coupling relationship between land use level and landscape ecological risk. The results show that:(1)from 2000 to 2015, the land use types of Jianghan Plain were mainly cultivated land, water area and construction land, and the land transfer types were mainly cultivated land to construction land;(2)from 2000 to 2015, the landscape ecological risk in the Jianghan Plain evolved significantly in time and space; cold spots and sub-cold spots increased, and both sub-hot spots and hot spots showed a trend of first increasing and then decreasing; the high-value areas of ecological risk mainly distributed in Honghu City in the southeast of Jianghan Plain, and the low-risk areas mainly distributed in Dangyang City and Songzi City in the west of Jianghan Plain;(3)from 2000 to 2015, the area of the low ecological risk area in the Jianghan Plain showed a gradual decrease, from 2 015.63 km2 in 2000 to 1 960.87 km2 in 2015; the area of the medium-risk zone increased first and then decreased, with the largest increase from 2005 to 2010, reaching to 2 061.26 km2;(4)from 2000 to 2005, the overall shift of the low ecological risk center of gravity in the Jianghan Plain was not obvious, and it mainly distributed in the northwest of the Jianghan Plain; the lower ecological risk center of gravity shifted the largest spatial span, shifting 79.8 km westward; the medium-risk areas mainly shifted to the northeast, and the higher-risk areas and high-risk areas mainly concentrated in Honghu City in the southeast of Jianghan Plain, and both showed a trend of shifting to the northeast; the higher-risk areas shifted their centers of gravity significantly faster than High-risk area. This research can provide scientific basis and theoretical reference for urban land use development and ecological risk assessment. |
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| Keywords: | land use landscape ecological risk Jianghan Plain global autocorrelation model |
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