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所在平台: Udemy |
课程主页: https://www.udemy.com/course/simple-and-fast-method-for-flood-hazard-mapping/
课程评论：没有评论
**课程名称：** 洪水淹没图绘制的简单快速方法 **课程概述：** 洪水是全球范围内造成巨大财产损失和人员伤亡的主要自然灾害，尤其是在发展中国家。传统的水力模型虽然已被广泛开发并与地理信息系统（GIS）集成，但其性能受多种因素影响，且在数据有限的地区运行复杂。本课程介绍一种简单快速的洪水淹没图绘制方法——HAND（Height Above Nearest Drainage，即高于最近排水通道的高度）方法。 HAND方法由Renno等人（2008年）首次提出，是一种水文地形分析方法，已在全球不同地区应用于洪水危险度评估、洪水敏感性分析和水文建模。该方法的核心在于计算地形图上每个网格单元与最近的排水河道的垂直距离，这个距离即为HAND值。通过将HAND值与特定水位进行比较，可以识别出所有HAND值低于该水位的网格单元，这些区域被视为洪水淹没区域。 **关键词：** 洪水、淹没、洪水淹没图、HAND方法、地形分析、水文建模、GIS
Flooding is one of the major natural disasters that affects many parts of the world and has led to huge amounts of property damages and human life losses, especially in developing countries (Wilby et al., 2008; Cook and Merwade, 2009; Spence et al., 2011; Arnell and Gosling, 2016; Liu et al., 2017). Over the past decades, several hydraulic models have been developed and integrated with geographic information systems (GIS). The performance of these models depends on several factors and running a hydraulic model for a river reached can be complicated especially for data-limited regions. Instead of using these models for the estimation of flood extent and flood depth, we can use a simple and fast method called the HAND method for this issue. The Height Above Nearest Drainage (HAND), first introduced by Renno et al. 2008, is a hydrological terrain analysis method, that has been used for flood hazard mapping, flood susceptibility, and hydrological modeling in different parts of the world (Rodda, 2005; Huang et al. 2017; Afshari et al. 2018; Zheng et al. 2018). In this method, the vertical distance between a cell in a topography map and the nearest cell along a river that it drains into defines the HAND value (Afshari et al. 2018). All grid cells on the topography map that have a HAND value lower than the specified water level are considered inundated.
