1. 宁波大学 地理与空间信息技术系,浙江,宁波,315211
2. 宁波大学 学报编辑部,浙江,宁波,315211
3. 宁波大学 东海研究院,浙江,宁波,315211
纸质出版:2018
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田鹏, 史小丽, 李加林, 等. 杭州市土地利用变化及生态风险评价[J]. 水土保持通报, 2018,38(4):274-281.
TIAN Peng, SHI Xiaoli, LI Jialin, et al. Land Use Change and Ecological Risk Assessment in Hangzhou City[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 274-281.
田鹏, 史小丽, 李加林, 等. 杭州市土地利用变化及生态风险评价[J]. 水土保持通报, 2018,38(4):274-281. DOI: 10.13961/j.cnki.stbctb.2018.04.044.
TIAN Peng, SHI Xiaoli, LI Jialin, et al. Land Use Change and Ecological Risk Assessment in Hangzhou City[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 274-281. DOI: 10.13961/j.cnki.stbctb.2018.04.044.
[目的]分析浙江省杭州市土地利用变化并对其生态风险评价,为保护该地区生态安全,合理开发土地资源和制定科学有效的规划提供理论依据。[方法]基于杭州市土地利用格局变化,构建生态风险指数,分析生态风险的时空变化及生态风险对土地利用的响应特征。[结果]①土地利用变化主要表现为:耕地减少和建设用地剧增;耕地、林地向建设用地转移,水域、草地向耕地、林地转移;土地利用强度减缓。②杭州市生态风险增加,生态风险值与土地利用呈明显正相关;中生态风险区占主导地位,高生态风险区主要分布在市辖区、杭州湾,西南部的淳安县中心,生态风险等级区以此为中心向周围递减。③生态风险等级以低—高等级转移为主,生态风险等级上升,年均转换速率呈下降趋势。④生态风险对土地利用变化的响应弹性时空分异较大,市区、建德市、桐庐县响应系数下降,其风险源和风险因子趋于多样化;其他单元的响应系数上升,土地利用对区域生态风险呈正响应弹性。[结论]杭州市土地利用格局时空变化明显,土地利用的快速变化加剧了杭州市的生态风险。
[Objective] The analyses of land use change and ecological risk assessment in Hangzhou City
Zhejiang Province will provide theoretical basis for protecting ecological security
developing land resources reasonably and making scientific and effective planning.[Methods] Based on the change of land use pattern in Hangzhou City
the ecological risk index was constructed to analyze the spatial and temporal change of ecological risk and the response characteristics of ecological risk to land use.[Results] ① The land use change was mainly manifested as:the reduction of cultivated land and the increase of construction land; the transfer of cultivated land and forest land to construction land
the transfer of waters and grassland to cultivated land and forest land; the intensity of land use was slowed. ② The ecological risk increaseed in Hangzhou City
and the ecological risk value was positively correlated with land use. The moderate ecological risk area occupied the dominant position
the extremely high ecological risk areas were mainly distributed in the city area
Hangzhou Bay
southwest of the center of Chun'an County
the ecological risk area as a center to periphery decline. ③ The ecological risk grade was mainly low-high grade transfer
the ecological risk grade rises
and the annual average conversion rate was decreasing. ④ The response of ecological risk to land use change was more flexible in spatiotemporal space
and the response coefficient of urban areas
Jiande City and Tonglu County was declining. The risk sources and risk factors tended to diversify; the response coefficients of other units increased
and land use had a positive response to regional ecological risks.[Conclusion] The spatial and temporal change of land use pattern in Hangzhou City is obvious
and the rapid change of land use aggravates the ecological risk of Hangzhou City.
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