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首页> 外文会议>International Conference on Water and Environment(WE-2003); 20031215-18; Bhopal(IN) >Effect Of Urbanization On Runoff Coefficient A Case Study Of Notwane Catchment In Botswana
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Effect Of Urbanization On Runoff Coefficient A Case Study Of Notwane Catchment In Botswana

机译：城市化对径流系数的影响-以博茨瓦纳诺瓦河集水区为例

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This study attempts to look at the effect(s) of urbanization on the runoff co-efficient, which is an associated problem due to replacement of the natural drainage system by man-made landscape with introduction of impervious surfaces such as houses, roads and pavements. A multi-cell Water Balance technique was used to determine runoff coefficients for the catchment between 1978 and 2000 on the Notwane Catchment in Botswana, which covers the country's major population cluster. From the analysis, average runoff co-efficient over the past two decades (1981-1990) and (1991-2000) was found to change by 6% from 0.48 to 0.51communserate with the 6% increase on the percentage of urbanisation. Simulation studies, taking into account the present scenario of climate change and the changes in the land use due to urbanisation, showed that the runoff coefficient might reach a value of 0.51 at the end of 2010, calling for necessary watershed management activities.
机译：这项研究试图研究城市化对径流系数的影响，这是一个相关问题，这是由于人工景观取代了自然排水系统，并引入了不透水的表面，如房屋，道路和人行道。多单元水平衡技术被用来确定1978年至2000年博茨瓦纳Notwane流域的流域径流系数，该流域覆盖了该国的主要人口群。通过分析，发现过去二十年（1981-1990年）和（1991-2000年）的平均径流系数从0.48改变为0.51，而城市化百分比提高了6％。模拟研究考虑了气候变化的现状以及城市化导致的土地利用变化，结果表明，到2010年底，径流系数可能达到0.51，要求进行必要的流域管理活动。

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