| Impacts of water surface area of watershed on design flood简 |
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| 基金项目： | This work was supported by the Major Water Conservancy Scientific Research and Technology Promotion Project of Shandong Province, the Special Fund for the Public Welfare Industry of the Ministry of Water Resources of China （Grant No. 201201022）, and the Open Foundation of the State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering of Hohai University （Grant No. 2011490111）. |
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| 摘 要： | In order to analyze the impact of the water surface area of a watershed on the design flood, the watershed was classified into a land watershed and a water surface watershed for flood flow calculation at the same time interval. Then, the design flood of the whole watershed was obtained by adding the two flood flows together. Using this method, we calculated design floods with different water surface areas of three reservoirs and analyzed the impact of water surface area on the flood volume and peak flow. The results indicate that larger water surface areas lead to greater impacts on the flood volume and peak flow. For the same watershed area, the impact of water surface area on the flood volume and peak flow is positively proportional to the flood frequency, i.e., the higher the frequency, the greater the impact becomes.
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| 关 键 词： | 水面面积 设计洪水 流域洪水 流量计算 洪峰流量 洪水总量 洪水频率 时间间隔 |
| 收稿时间： | 30 October 2012 |
Impacts of water surface area of watershed on design flood |
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| Authors: | Qing-hua ZHANG Yan-fang DIAO Jie DONG |
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| Affiliation: | [1]College of Water Conservancy and Civil Engineering, Shandong Agricultural University Taian 271018, P. R. China [2]State Key Laboratory of Hydrology- Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China |
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| Abstract: | In order to analyze the impact of the water surface area of a watershed on the design flood, the watershed was classified into a land watershed and a water surface watershed for flood flow calculation at the same time interval. Then, the design flood of the whole watershed was obtained by adding the two flood flows together. Using this method, we calculated design floods with different water surface areas of three reservoirs and analyzed the impact of water surface area on the flood volume and peak flow. The results indicate that larger water surface areas lead to greater impacts on the flood volume and peak flow. For the same watershed area, the impact of water surface area on the flood volume and peak flow is positively proportional to the flood frequency, i.e., the higher the frequency, the greater the impact becomes. |
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| Keywords: | watershed water surface area design flood flood frequency flood volume peak Jlow |
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