Acta Geographica Sinica ›› 2008, Vol. 63 ›› Issue (10): 1055-1063.doi: 10.11821/xb200810005

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Impact of Urban Planning and Industrial Development on Wetlands in Hangzhou Bay

REN Liyan1,2, WU Cifang1, YUE Wenze1, LIU Yong3, LU Zhangwei1   

  1. 1. College of Public Administration, Zhejiang University, Hangzhou 310029, China;
    2. Faculty of Architectural Civil Engineering and Environment, Ningbo University, Ningbo 315211, China;
    3. College of Resources and Environment, Southwest University, Chongqing 400715, China
  • Received:2008-01-16 Revised:2008-06-10 Online:2008-10-25 Published:2008-10-25
  • Supported by:

    Key Project of Zhejiang Provincial Science and Technology Programs, No. 2005C23059; National Key Technology R&D Program of China, No.2006BAJ11B03; National Natural Science Foundation of China, No.40701177

Abstract:

Hangzhou Bay Industries Belt is located in the north of Zhejiang Province, which is the important part of the Yangtze River Delta. With the rapid development of urbanization and industrialization, plenty of wetlands in this area were occupied and the conflict between economic development and wetlands protection will still be severe in the future. Based on remote sensing images and urban planning data, this paper analyzed the planned conversion of wetlands to urban construction lands from 2005 to 2020 and the potential risk to wetlands using GIS spatial model. Conclusions were drawn as follows: (1) Wetlands in Hangzhou Bay Industries Belt are distributed widely and most of them are close to present urban construction lands. (2) According to present planning, construction lands will expand rapidly in the coming 15 years and will occupy many wetland areas, most of which are distributed in Ningbo, Hangzhou and Cixi. Two wetland types, i.e., ponds and aquiculture water, which are distributed in the reclaimed areas of Hangzhou Bay south coast will decrease greatly. Potential risk to wetlands by construction lands layout is great at Daishan and Zhoushan. (3) On the whole, the potential risk to wetlands is great. The first risk rank is about 8000 hm2, being 69% of the total decreased area. The second, third and fourth risk ranks are about 2000 hm2, 700 hm2 and 700 hm2, accounting for 19% , 6% and 6% of the total decreased area, respectively. Besides, the tendency of wetlands occupation by urban construction lands will not decrease from 2005 to 2020. (4) The increase extent and the layout of construction lands have great effect on the decrease of wetlands. Adjustment of construction lands planning, compensating for wetlands loss, building of wetland park and other measures should be taken to protect wetlands.

Key words: risk analysis, urban planning, Hangzhou Bay Industries Belt, wetlands, change prediction