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Coupling relationship between spatial-temporal variation of lakes and waterlogging in the coastal city Tianjin

  • role： First author第一作者
  • Affiliation：

    School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China

  • Email：zjl1992_127@163.com
  • Introduction：臧金龙，1992年生，男，硕士研究生，研究方向为资源与环境遥感监测。E-mail:zjl1992_127@163.com
ZANG Jinlong,  
  • role： Corresponding author通信作者
  • Affiliation：

    School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China

  • Email：gqiaozhen@tcu.edu.cn
  • Introduction：国巧真，1979年生，女，副教授，研究方向为资源与环境遥感监测。E-mail:gqiaozhen@tcu.edu.cn
GUO Qiaozhen*,  
  • Affiliation：

    School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China

SANG Xiao,  
  • Affiliation：

    School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China

XIE Tongyao,  
  • Affiliation：

    School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China

HE Chengwei

Resümee

In recent years, the problem of urban waterlogging has become prominent, which has brought many inconveniences towards social production and human life. Taking Tianjin as an example, the coupling on the spatial evolution of lakes and waterlogging was studied.Based on the Landsat series data, multi-ban water index was used to extract the lake from 1984 to 2017 year by year. Combined with the data on waterlogging, a comprehensive evaluation index system on lake evolution and waterlogging systems was proposed. Meanwhile, a coupling degree model between lake evolution and waterlogging was established.Results indicated that the lake area in Tianjin volatility increased from 1984 to 2005 and intermittently decreased from 2005 to 2017. From 2005 to 2017, the lake area in Dongli District decreased the fastest and the greatest. The proportion of lakes in most districts also decreased significantly. The waterlogging areas of Tianjin were mainly distributed in the six districts of the city centre and nearby districts. Areas without lakes were more likely to produce waterlogging than areas with lakes; areas with few lakes were more likely to produce waterlogging than areas with many lakes; the smaller the proportion of lakes, the greater the density of waterlogging points. The lake group moved from the centre towards the whole Tianjin, and the opposite direction of the lake’s centroid movement was likely to produce waterlogging.Lake areas in Tianjin have decreased in recent years, and the reduction is mainly due to human interference. The decrease of lakes is one of the important causes of waterlogging. Therefore, a primary coupling and coordination relationship exists between lake evolution and waterlogging.

Schlüsselwort

remote sensing;Landsat;urban waterlogging;lake area;lake centroid;coupling degree

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