基于地表路径追踪的排水流域识别方法
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摘要
基于传统的水文流向分析算法,通过对汇水流域的计算方法进行改进,建立了综合考虑地形变化因素和城市雨水管网系统布局的流域识别计算方法。实例研究表明,该方法可快速实现雨水管网系统影响下的排水流域自动计算,可为雨水管网系统的规划改造提供技术支撑。同时,结合水力模型工具计算超标降雨下的内涝情景,以原始地形栅格叠加内涝淹水计算结果后的新栅格数据为基础,开展了北京下凹式立交桥客水区影响范围划定的实例研究。结果表明,基于路径追踪法,以立交桥低区范围内栅格作为路径追踪终点,可计算获得不同重现期情景下的客水区影响范围,为桥区内涝规划改造方案的制定提供重要的决策依据。
Based on traditional hydrologic flow direction algorithm,a watershed identification method with the consideration of topography variation and the layout of stormwater pipe network was established through improvement of route tracking algorithm for watershed calculation. The case study showed that this method was capable of realizing automatic rapid calculation of drainage watershed under the influence of stromwater pipe network system,which could provide technical support for the planning and design of stromwater pipe network system. Meanwhile,a case study of impact scoping analysis in an area of concave-down overpass of Beijing was carried out combined with hydraulic model tools to calculate the waterlogging situation under the condition of excessive rainfall based on the new grid data obtained from calculation of the original terrain grid superimposed with waterlogging. It was shown that the outside affected range could be calculated by using route tracking method when the low-inside area of overpass was taken as the destination of route tracking,which provided an important basis for the plan and reconstruction of waterlogging control in bridge area.
Based on traditional hydrologic flow direction algorithm,a watershed identification method with the consideration of topography variation and the layout of stormwater pipe network was established through improvement of route tracking algorithm for watershed calculation. The case study showed that this method was capable of realizing automatic rapid calculation of drainage watershed under the influence of stromwater pipe network system,which could provide technical support for the planning and design of stromwater pipe network system. Meanwhile,a case study of impact scoping analysis in an area of concave-down overpass of Beijing was carried out combined with hydraulic model tools to calculate the waterlogging situation under the condition of excessive rainfall based on the new grid data obtained from calculation of the original terrain grid superimposed with waterlogging. It was shown that the outside affected range could be calculated by using route tracking method when the low-inside area of overpass was taken as the destination of route tracking,which provided an important basis for the plan and reconstruction of waterlogging control in bridge area.
引文
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[8]刘畅,周玉文,赵见.下凹式立交桥内涝模型构建方法及原因分析[J].河北工业科技,2014,31(5):389-394.Liu Chang,Zhou Yuwen,Zhao Jian.Modeling method and reason analysis of urban flooding in concave-down overpass area[J].Hebei Journal of Industrial Science&Technology,2014,31(5):389-394(in Chinese).
[2]朱晨东.关于北京下凹式立交桥积水的思考[J].北京水务,2011(5):4-5.Zhu Chendong.Thoughts on the waterlogging of concave overpass in Beijing[J].Beijing Water,2011(5):4-5(in Chinese).
[3]张书亮,干嘉彦,曾巧玲,等.GIS支持下的城市雨水出水口汇水区自动划分研究[J].水利学报,2007,38(3):325-329,336.Zhang Shuliang,Gan Jiayan,Zeng Qiaoling,et al.Automatic compartmentalization of urban rainwater catchments on water outlet supported by GIS technology[J].Journal of Hydraulic Engineering,2007,38(3):325-329,336(in Chinese).
[4]曾巧玲.城市汇水区自动划分研究[D].南京:南京师范大学,2005.Zeng Qiaoling.Study on Automatic Division of Urban Catchment Area[D].Nanjing:Nanjing Normal University,2005(in Chinese).
[5]汤国安,杨昕.Arc GIS地理信息系统空间分析实验教程[M].北京:科学出版社,2006.Tang Guoan,Yang Xin.ArcGIS Geo-information System Spatial Analysis Course[M].Beijing:Science Press,2006(in Chinese).
[6]顾孝天,李宁,周扬,等.北京“7·21”暴雨引发的城市内涝灾害防御思考[J].自然灾害学报,2013(2):1-6.Gu Xiaotian,Li Ning,Zhou Yang,et al.Thinking on urban waterlogging disaster defense initiated by“7·21”extraordinary rainstorm in Beijing[J].Journal of Natural Disasters,2013(2):1-6(in Chinese).
[7]于娟.基于Arc Engine的Grid数据编辑与应用系统的设计与实现[D].兰州:兰州交通大学,2009.Yu Juan.The Design and Realization of Edit and Application of ESRI Grid Based on Arc Engine[D].Lanzhou:Lanzhou Jiaotong University,2009(in Chinese).
[8]刘畅,周玉文,赵见.下凹式立交桥内涝模型构建方法及原因分析[J].河北工业科技,2014,31(5):389-394.Liu Chang,Zhou Yuwen,Zhao Jian.Modeling method and reason analysis of urban flooding in concave-down overpass area[J].Hebei Journal of Industrial Science&Technology,2014,31(5):389-394(in Chinese).