地球信息科学学报 ›› 2014, Vol. 16 ›› Issue (2): 233-241.doi: 10.3724/SP.J.1047.2014.00233

• 地理空间分析综合应用 • 上一篇    下一篇

武汉城市圈的水源涵养功能重要性评价研究

白杨1,3, 初东2, 田良1, 冯宇3, 张哲3   

  1. 1. 海南大学, 海口 570228;
    2. 环境保护部卫星环境应用中心, 北京 100094;
    3. 中国环境科学研究院, 北京 100012
  • 收稿日期:2013-10-30 修回日期:2013-12-10 出版日期:2014-03-10 发布日期:2014-03-10
  • 通讯作者: 初 东(1966- ),女,吉林人,高级工程师,主要从事卫星遥感技术在环境应用领域的研究。E-mail:chdgps010@126.com E-mail:chdgps010@126.com
  • 作者简介:白 杨(1989- ),男,湖南长沙人,硕士生,主要从事区域生态学方面的研究。E-mail:baiyang0701@sohu.com
  • 基金资助:

    基于生态系统管理的规划环境影响评价技术研究(201009021);环境保护部公益项目(201209044-02);环境保护部全国生态环境十年变化(2000-2010年)遥感调查与评估项目。

Assessing the Importance of Water Conservation Function in Wuhan City Circle

BAI Yang1,3, CHU Dong2, TIAN Liang1, FENG Yu3, ZHANG Zhe3   

  1. 1. Hainan University, HaiKou 570228, China;
    2. Satellite Environment Application Center, Ministry of Environmental Protection, Beijing 100012, China;
    3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
  • Received:2013-10-30 Revised:2013-12-10 Online:2014-03-10 Published:2014-03-10
  • Contact: 10.3724/SP.J.1047.2014.00233 E-mail:chdgps010@126.com

摘要:

本文以武汉城市圈为研究对象,分析城市发展对该区域水源涵养功能的影响。文中选取植被、气象、地形、土壤和人为5个因子,分别以植被覆盖度、降水量、蒸发量、坡度、坡长、土壤层厚度和覆盖类型作为水源涵养功能重要性的评价指标,综合采用专家判断矩阵和层次分析法构建其指标体系。利用遥感、GIS等空间分析技术对武汉城市圈水源涵养功能重要性进行评价,并分析影响水源涵养功能的各单因子重要性的动态变化及空间分布格局。结果表明:2000-2009年间,武汉城市圈水源涵养功能呈现先增高后降低的趋势;空间分布格局主要表现为武汉城市圈东北部、东南部低山丘陵地带的水源涵养功能重要性较高;短时间尺度上,人为活动所导致植被覆盖度的变化和覆盖类型的改变是影响水源涵养功能的主要因素。其中,2005-2009年间,人类不合理开发利用土地导致植被覆盖度降低、湖泊湿地减少是武汉城市圈水源涵养功能下降的主要原因。

关键词: 影响因子, 水源涵养功能, 武汉城市圈, 重要性评价

Abstract:

In this paper, we analyzed the influence of city development on the regional water conservation function in Wuhan City Circle. Taking the factors of vegetation, meteorology, terrain, soil and man-made into account, we respectively selected vegetation cover, precipitation, evaporation, slope, slope length, soil thickness and coverage types as the assessment indicators of water conservation function importance. Based on a combination of the expert judgment matrix and AHP, the index system was built. Furthermore, we applied RS and GIS spatial analysis technology to analyze the dynamic change and the spatial distribution of each factor importance on the water conservation function, and then comprehensively assessed the function importance. The results showed that the intensity of the water conservation function importance increased first and then decreased from 2000 to 2009 in Wuhan City Circle, the area of the most important water conservation function increased from 9283 to 16 131 km2, but then reduced to 11 258 km2, the area of the general important water conservation function increased dramatically, especially from 2005 to 2009 it grew by 1.1 times. The Northeast of the city circle and in the Southeast of the hilly areas were much more important, and the factor of human activities that caused the changes in vegetation cover and coverage types played an important role on the water conservation function in short time. Recently, lots of unreasonable activities, such as deforestation, grass destruction, and farming around the lake turned out. Because of a significant reduction in water area, forest and grass owning to urban expension, the water conservation function changed. The main reason why the water conservation function declined between 2005 and 2009 in Wuhan City Circle was that human being explored land irrationally which directly made a reduction in vegetation cover, and in areas of lakes and wetlands.

Key words: Wuhan City Circle, importance assessment, impact factors, water conservation function