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首页> 外文会议>Asian conference on remote sensing;ACRS >FLOOD RISK ASSESSMENT AND MAPPING USING REMOTE SENSING AND GIS: A CASE STUDY AT HO A CHAU COMMUNE, HOA VANG DISTRICT IN CENTRAL OF VIETNAM
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FLOOD RISK ASSESSMENT AND MAPPING USING REMOTE SENSING AND GIS: A CASE STUDY AT HO A CHAU COMMUNE, HOA VANG DISTRICT IN CENTRAL OF VIETNAM

机译：遥感和GIS的洪灾风险评估与制图-以越南中部华旺区河洲市为例

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摘要

Flood risk assessment and mapping were conducted to identify the high risk zones for the decision makers in executing the rural planning in the future of Hoa Chau commune, central Vietnam. ALOS/PALSAR image was applied in ordered to extract the inundated areas in the historical floods of 2007. Flow direction characteristics deriving from the Aster GDEM was utilized to extract the depressed surfaces. Then the past flood experience and the flow direction was integrated to analyses and rank the potential flood hazard zones. The results were validated using land use/cover map extracting from ALOS Avnir-2 and flood depth point records from field surveys. Demographic vulnerability was assessed based on the susceptibility to flood hazard of the vulnerably groups including children, elders, impoverished households, and females. Finally Flood risk was obtained by evaluating the flood hazard and demographic vulnerability with a ranking matrix in two-dimensional multiplication model. The result shows that the flow direction and ALOS/PALSAR was integrated effectively for conducting the potential flood hazard when hydrological and metrological data are inadequate and remote sensing images taken during flood times are not available or insufficient.
机译：进行了洪水风险评估和制图，以确定决策者在越南中部华洲公社未来执行农村规划时的高风险区域。应用ALOS / PALSAR图像按顺序提取了2007年历史洪水中的淹没区域。利用Aster GDEM得出的流向特征提取了凹陷的地表。然后，将过去的洪水经验和流向进行整合，以对潜在的洪灾危险区进行分析和排名。使用从ALOS Avnir-2中提取的土地使用/覆盖图和实地调查的洪水深度点记录对结果进行了验证。根据包括儿童，老人，贫困家庭和女性在内的弱势群体的洪灾易感性，评估了人口脆弱性。最后，通过在二维乘法模型中使用等级矩阵评估洪水灾害和人口脆弱性来获得洪水风险。结果表明，当水文和气象数据不足以及洪水期间无法获取或不足的遥感图像时，流向和ALOS / PALSAR可以有效地整合，以进行潜在的洪水灾害。

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