• Journal of Geographical Sciences
  • Vol. 30, Issue 4, 04000583 (2020)
CHEN Kunlun1、2、3, LIU Xiaoqiong1, CHEN Xi2, GUO Yuqi3, and DONG Yin4、*
Author Affiliations
  • 1School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
  • 2Department of Geography, University of Cincinnati, Cincinnati, OH 45221, USA
  • 3School of Physical Education, China University of Geosciences, Wuhan 430074, China
  • 4School of Public Administration, China University of Geosciences, Wuhan 430074, China
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    Abstract

    The shapes of the urban lakes in Wuhan city have been strongly influenced by the rapid industrialization and urbanization experienced in recent decades. Based on topographic maps and remote sensing images, the temporal and spatial changes of East Lake, Wuhan city, over the past two decades were analyzed. The landscape shape index (LSI) and centroid method were applied to analyze the evolution of lake morphology and its causes. Several key results were obtained. (1) The surface area of East Lake decreased sharply by 2.13 km 2 from 1995 to 2005, and slightly by 1.00 km 2 from 2005 to 2015. The shoreline length of East Lake displayed a continuous trend of decline during the study period: The length reduced by 21.89 km from 1995 to 2005, and by 0.67 km from 2005 to 2015. The LSI values, 7.04 (1995), 6.46 (2005), and 6.28 (2015), displayed an accelerated downward trend, indicating a reduction of complexity in East Lake and the intensification of manual interventions in the water body. (2) The changes to East Lake displayed a clear temporal and spatial heterogeneity. The centroid of East Lake moved northeast from 1995 to 2005 and southeast from 2005 to 2015. (3) The reduction in the area of East Lake was mainly affected by human activities. A lake area of about 4.8 km 2 was converted to other land uses during 1995-2005, most of which was unused land, whereas from 2005 to 2015, 0.43 km 2 of the lake area was converted into built-up land, and 0.25 km 2 was converted into other land uses. The reduction in area was caused by infrastructure construction by the government, the development of the real estate industry, illegal construction by villagers, and the development of scenic spots for tourism. The driving forces of this reduction included Wuhan’s growing population, and the rapid development of the economy and urbanization between 1995 and 2015, which has resulted in a large demand for land. Finally, a formation mechanism model was constructed by analyzing the causes of East Lake’s morphological evolution.

    1 Introduction

    Rapid industrialization and urbanization have promoted China’s fast economic growth and sustained social prosperity in the past three decades, which caused a large amount of consumption of resources and environment. Meanwhile, the problem of resources and environment in the context of global change has become a common one faced by all countries around the world. How to correctly handle the relationship between economic development and ecological environment has also become the focus of academic and international political attention (Jin et al., 2017; Tsai et al., 2018; Zhang et al., 2018; Jin et al., 2019; Li et al., 2019). Urban expansion has generated economic developments along urban waterfronts, but this has also led to the shrinkage of the original wetland, which plays an important role in regulating climate, purifying wastewater, and preserving biodiversity (Cuffney et al., 2010; Li et al., 2018; Sahana et al., 2018). As one of the most important features of the urban water environment, urban lakes experience many environmental problems (Niu et al., 2015; Zeng et al., 2013; Li et al., 2013). The dynamic conflicts between the changes in water bodies and urbanization have led to significant changes in riparian environments, with the interpretation of these changes often being complex (Zou et al., 2017).