Establishing flood damage functions for agricultural crops using estimated inundation depth and flood disaster statistics in data-scarce regions

IF 0.6 Q4 WATER RESOURCES
Nhu Y Nguyen, Y. Ichikawa, H. Ishidaira
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引用次数: 16

Abstract

: Flood damage functions form the core of flood risk assess ment. This study proposes a method for establishing flood damage functions for agricultural crops in data-scarce regions. The method assumes that the flood damage ratio is a function of inundation depth only and utilizes inundation depth estimated from flood extent information and hydro­ dynamic simulations. The parameters of the damage functions are calibrated through the SCE­UA method (Shuffled Complex Evolution method developed at The University of Arizona) so that the calculated flood damages match obser vations compiled in flood disaster statistics. The established three functions show good agreement with actual agricultural damages caused by a rainfall event in 2010 and are validated against another rainfall event in 2009. The results indicate that the established damage functions are capable of estimating flood damage at the district scale, while damage estimations at finer spatial resolution differ between the functions, suggesting that detailed statistical data need to be incorporated to reduce the estimation uncertainty at fine scales.
在数据匮乏地区,利用估计淹没深度和洪水灾害统计建立农作物洪水损失函数
洪水灾害函数是洪水风险评估的核心。本研究提出了一种建立数据稀缺地区农作物洪涝灾害函数的方法。该方法假设洪涝灾害比仅是淹没深度的函数,并利用洪水范围信息和水动力模拟估算的淹没深度。通过SCE-UA方法(美国亚利桑那大学开发的shuffed Complex Evolution方法)对损伤函数的参数进行校准,使计算的洪水损伤与洪水灾害统计中编制的观测值相匹配。所建立的三个函数与2010年某次降雨事件造成的实际农业损失吻合较好,并在2009年某次降雨事件中得到验证。结果表明,所建立的灾害函数能够在区域尺度上估计洪水灾害,而在更精细的空间分辨率下,不同函数之间的损失估计存在差异,需要结合详细的统计数据来降低在精细尺度上的估计不确定性。
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来源期刊
CiteScore
1.90
自引率
18.20%
发文量
9
审稿时长
10 weeks
期刊介绍: Hydrological Research Letters (HRL) is an international and trans-disciplinary electronic online journal published jointly by Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH), aiming at rapid exchange and outgoing of information in these fields. The purpose is to disseminate original research findings and develop debates on a wide range of investigations on hydrology and water resources to researchers, students and the public. It also publishes reviews of various fields on hydrology and water resources and other information of interest to scientists to encourage communication and utilization of the published results. The editors welcome contributions from authors throughout the world. The decision on acceptance of a submitted manuscript is made by the journal editors on the basis of suitability of subject matter to the scope of the journal, originality of the contribution, potential impacts on societies and scientific merit. Manuscripts submitted to HRL may cover all aspects of hydrology and water resources, including research on physical and biological sciences, engineering, and social and political sciences from the aspects of hydrology and water resources.
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