快速城市化地区生态需水与土地利用结构关系研究  

Relationship between Urban Ecological Water Demand and Land Use Structure in Rapid Urbanization Area

作　　者：杨沛[1] 毛小苓[1] 李天宏[1] 

机构地区：[1]北京大学环境工程系,水沙科学教育部重点实验室,北京100871

出　　处：《北京大学学报（自然科学版）》2010年第2期298-306,共9页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家重点基础研究发展计划项目(2007CB407202)资助

摘　　要：快速城市化地区,土地利用的剧烈改变严重影响了城市生态系统的结构和功能,其中对城市生态需水变化特征作用显著。以深圳市为例,分析了1988—2006年期间生态需水特征指标EWI与面向生态需水的土地利用结构特征指标SI的变化特征;重点对1993—2003年期间特区内、外SI和EWI进行相关分析,以反映不同城市化阶段城市生态需水和土地利用结构的关系特征。结果表明:1)全市EWI和SI均呈显著下降趋势,且具有空间差异性;2)特区内、外城市化进程存在明显差异,EWI和SI的变化特征不同;3)区域城市化处于初期和中期阶段时SI和EWI之间具有显著正相关性,但是随着城市化率的进一步提高,SI和EWI的相关性显著下降,甚至不复存在。Land use changes seriously in the rapid urbanization area and could impact the urban ecosystem structure and function significantly, especially changing the characteristics of Urban Ecological Water Demand（UEWD）. Based on the case study of Shenzhen, this paper analyzed the changes of SI （Index of Land use Structure Subject to UEWD） and EWI （Index of Urban Ecological Water Demand） in the period from 1988 to 2006. In order to know the relationship between UEWD and land-use change under different urbanization stages, the correlations between SI and EWI of inner and outside of the Shenzhen Special Economic Zone （SSEZ） from 1993 to 2003 were discussed respectively. The results show that 1） EWI and SI were significantly decreased with different spatial character; 2） because of the different urbanization process of inner and outside of SSEZ, the characteristics of EWI and SI changes are distinct ; 3） the relationship between EWI and SI is significantly positive correlated when the regional urbanization rate is low, but the correlation no longer exist as the rate increased further.

关 键 词：城市化 生态需水 土地利用 深圳 

分 类 号：F301[经济管理—产业经济] TV211.1[水利工程—水文学及水资源]