地球信息科学学报 ›› 2016, Vol. 18 ›› Issue (12): 1608-1614.doi: 10.3724/SP.J.1047.2016.01608

• 地球信息科学理论与方法 • 上一篇    下一篇

顾及地表汇水分析的城市DEM构建

王峥1,2,3,4,5(), 孙永华2,3,4,5,*(), 李小娟2,3,4,5   

  1. 1. 国家海洋环境预报中心,北京 100081
    2. 首都师范大学资源环境与旅游学院,北京 100048
    3. 北京城市环境过程与数字模拟国家重点实验室培育基地,北京 100048
    4. 三维信息获取与应用教育部重点实验室,北京 100048
    5. 资源环境与地理信息系统北京市重点实验室,北京 100048
  • 收稿日期:2016-07-08 修回日期:2016-10-27 出版日期:2016-12-27 发布日期:2016-12-20
  • 通讯作者: 孙永华 E-mail:wz_eternal@163.com;syhua1982@163.com
  • 作者简介:

    作者简介:王 峥(1989-),女,北京人,硕士生,主要从事遥感和地理信息系统应用研究。E-mail:wz_eternal@163.com

  • 基金资助:
    城市典型区域不均匀沉降信息获取与机理研究(2012CB723403)

Urban DEM Construction for Analysis of Surface Water Catchment

WANG Zheng1,2,3,4,5(), SUN Yonghua2,3,4,5,*(), LI Xiaojuan2,3,4,5   

  1. 1. National Marine Environment Forecasting, Beijing 100081, China
    2. College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China
    3. Urban Environmental Processes and Digital Modeling Laboratory, Beijing 100048, China
    4. Laboratory of 3D Information Acquisition and Application, MOST, Beijing 100048, China
    5. Beijing Municipal Key Laboratory of Resources Environment and GIS, Beijing 100048, China
  • Received:2016-07-08 Revised:2016-10-27 Online:2016-12-27 Published:2016-12-20
  • Contact: SUN Yonghua E-mail:wz_eternal@163.com;syhua1982@163.com

摘要:

城市暴雨内涝是城市最普遍的自然灾害之一。受城市复杂下垫面环境的影响,城市暴雨积水具有响应时间短、淹没速度快的特点。数字高程模型(Digital Elevation Model, DEM)是城市地表汇水分析的关键,是暴雨积水分析的基础,而传统方法构建的DEM不能满足复杂下垫面环境下城市暴雨积水淹没分析的需求。本文以构建顾及地表汇水分析的城市DEM为目的,提出基于多源数据融合思想和地形修正思想的DEM构建方法,即将数字摄影测量技术构建的大范围DEM与车载激光扫描技术构建的城市道路高精度DEM相融合,再利用影响雨水汇流路径的建筑物、水系等要素对DEM进行修正的构建方法。本文以北京市海淀区公主坟地区为例进行研究,结果表明该方法构建的DEM在道路区域高程精度可达厘米级,实现了对城市道路易积水区域的重点表达,基于该DEM的汇水分析结果基本符合城市下垫面汇水特点,因此,本文构建的DEM适用于城市道路、桥区汇水路径分析和积水淹没分析。

关键词: 暴雨积水, 立体像对, 车载激光扫描, 公主坟, 城市DEM, 高精度

Abstract:

:Urban rainstorm waterlogging is one of the urban' s most common natural disaster. Since the environment of urban underlying surface is complex, urban rainstorm waterlogging has a short response time and submerged speed characteristics. Digital Elevation Model (DEM) is the key of urban surface water catchment, and it is also the basis of rainstorm waterlogging inundation analysis, but the DEM building by traditional methods cannot meet the needs of urban flood analysis under complex underlying surface environment. This paper based on the thinking of multi-source data fusion terrain correction, aiming at constructing the urban DEM for the surface water catchment analysis. This paper used multi-source data fusion approach to incorporate DEM obtained by digital photogrammetry method and technology, then, modified the fused DEM using building、water system elements which change the route of urban runoff. This paper selected the Gongzhufen area in Haidian District, Beijing, to verify the feasibility of this method, the result showed that the urban DEM with a relatively high accuracy, especially in the urban road area where the accuracy was at the centimeter level. The DEM realized the key expression of urban road area which is easy to accumulate water, moreover, the water network and catchment area extraction results based on it were more accurate. The DEM built by this method was suitable for urban rainstorm waterlogging analysis.

Key words: rainstorm waterlogging, stereo pair, vehicle-borne laser scanning, GongZhuFen, urban DEM, high accuracy