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城市蓝绿景观格局对雨洪调蓄功能的影响
禹佳宁1, 周燕1, 王雪原2, 郭诗怡1
1.武汉大学;2.东南大学
摘要:
近年来,城市内涝问题频发,引发了社会强烈关注。现有研究多从灾害成因角度聚焦于景观格局变化对洪涝产生的影响,蓝绿景观格局与雨洪调蓄功能的响应关系尚待进一步探讨分析。以武汉市江夏区为研究区域,通过对比连续晴天及雨后情景下的遥感影像结果,建立了淹没转移变化矩阵表征调蓄状况,结合以往研究与斯皮尔曼相关系数分析的结果,选取了面积周长比、形状指数、分形维数、近圆指数、边缘对比度5个景观指数,运用二元Logistic回归分析,探究了景观格局对雨洪调蓄功能的影响。结果表明:1)分维指数对雨洪调蓄能力的发挥有直观的作用,城市存量布局优化中需要着重注意对蓝绿空间自然形态的保护;2)雨洪调蓄功能与蓝绿空间聚集度指标之间没有显著关联,蓝绿空间的复合程度对雨洪调蓄能力的影响有待更精细化的研究。研究结果为蓝绿空间景观格局的调蓄效能理论提供了量化支持,可为今后城市洪涝治理和景观格局优化研究提供一定的思路。
关键词:  蓝绿空间  景观格局  土地利用  城市内涝  雨洪调蓄  logistic 回归分析
DOI:10.14085/j.fjyl.2021.09.0063.05
分类号:TU985.2
基金项目:国家自然科学基金青年科学基金项目(编号 51708426);中央高校基本科研业务费专项基金(编号 2042018kf0250)
Influence of Urban Blue-green Landscape Pattern on Rainfall-flood Regulation and Storage Function
YU Jianing1, ZHOU Yan1, WANG Xueyuan2, GUO Shiyi1
1.Wuhan University;2.Southeast University
Abstract:
In recent years, frequent urban waterlogging has aroused strong concern in the society. The existing researches largely focus on the impacts of landscape pattern changes on flood from the perspective of the disaster genesis, and the response relationship between the blue-green landscape pattern and the rainfall-flood regulation and storage functions needs to be further studied. Taking Jiangxia District of Wuhan as the target, this research, by comparing the results of remote sensing images under continuous sunny and rainy days, establishes a rainfall-flood transfer matrix to characterize the storage conditions. Based on literature review and Spilman correlation coefficient analysis, it selects the landscape indexes of PARA, SHAPE, FRAC, CIRCLE and ECON, and applies the binary logistic regression analysis to analyze the influence of landscape pattern on the function of rainfall-flood regulation and storage. The results show that: 1) The FRAC has a direct effect on the capacity of rainfall-flood regulation and storage, and the protection of the natural form of blue-green space should be highlighted in the optimization of urban storage layout. 2) There is no significant correlation between the rainfall-flood regulation and storage and the contagion metrics of blue-green space. The results provide quantitative support for the theory of storage efficiency of urban blue-green landscape pattern, and ideas for the study of urban flood control and landscape pattern optimization.
Key words:  blue-green space  landscape pattern  land use  urban waterlogging  rainfall-flood regulation and storage  logistic regression analysis
引用本文:禹佳宁,周燕,王雪原,郭诗怡.城市蓝绿景观格局对雨洪调蓄功能的影响[J].风景园林,2021,28(9):63-67.
YU Jianing,ZHOU Yan,WANG Xueyuan,GUO Shiyi.Influence of Urban Blue-green Landscape Pattern on Rainfall-flood Regulation and Storage Function[J].Landscape Architecture Journal, 2021, 28(9):63-67.