学术
摘 要:
在城区化过程中，由于人口快速成长且集中，随之而来的建筑物、道路等不透水面密度增加，导致地下水补给减少及破坏水文循环。为了解土地利用方式改变对长期水文量影响，建立一个适宜的城区水循环模式是非常重要的。选定台湾台北的六馆抽水站集水区进行分析，模式参数经过敏感度分析、率定与验证。采用改变不同透水铺面设置比例的方案，评估其对径流量、入渗量、蒸发散量的改变。并分析设置不同比例屋顶雨水贮集系统对地表径流量及供水量的改变。所建立的城区水循环模式是评估土地利用改变造成水文量的改变的一个有效工具，并可提供决策者做为城区土地利用决策的参考。[著者文摘]
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文章出处:
《水科学进展》-2008年19卷1期 -49-53页
分 类 号:
文献标识码:
A
文章编号:
1001-6791（2008）01-0049-05
Hydrological cycle and improvement alternatives for urban area
LIAW Chao-hsien, CHAN Li-mei, CHEN Chia-liang, CHIU Yie-ru （ Department of Harbor and River Engineering of Taiwan Ocean University, Keelung Taiwan 20224, China）
Abstract:
Urbanization comes along with population increment and centralization, which enlarges the density of impervious ar- eas , results in dwindling ground water replenishment and deteriorating urban water cycle etc. In order to have a better under- standing and quantify the impacts from reducing impervious areas and installing rainwater catchment systems on long-term urban water cycle, building up an appropriate urban water cycle model is needed. The watershed of the Liu-guan pumping system in Taipei city has been chosen as the study area. Parameters in the model are calibrated and verified using measured data from the inflow of the pumping station. Sensitivity analysis of these parameters is also conducted. The hydrologic changes among surface runoff, infiltration and evaportranspiration for changing percentage of impervious areas by installing permeable pavement are examined. Also different percentages of existing buildings are assumed to install roof rainwater catchment systems and their im- pacts on surface runoff and water supply are evaluated. The urban water cycle model established in the study may easily assess the changes of water cycle by changing land uses and provide as a useful tool for urban planners.[著者文摘]
Key words:
urban area; hydrological cycle; roof rainwater catchment systems; improvement alternative
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