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Water 2014, 6(2), 345-366; doi:10.3390/w6020345
Article

Hydrological Flood Simulation Using a Design Hyetograph Created from Extreme Weather Data of a High-Resolution Atmospheric General Circulation Model

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Received: 11 November 2013; in revised form: 24 January 2014 / Accepted: 27 January 2014 / Published: 5 February 2014
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Abstract: To understand the characteristics of severe floods under global climate change, we created a design hyetograph for a 100-year return period. This incorporates a modified ranking method using the top 10 extreme rainfall events for present, near-future, and far-future periods. The rainfall data sets were projected with a general circulation model with high spatial and temporal resolution and used with a flood model to simulate the higher discharge peaks for the top 10 events of each term in a local watershed. The conventional-like ranking method, in which only a dimensionless shape is considered for the creation of a design hyetograph for a temporal distribution of rainfall, likely results in overestimates of discharge peaks because, even with a lower peak of rainfall intensity and a smaller amount of cumulative rainfall, the distribution shape is the only the factor for the design hyetograph. However, the modified ranking method, which considers amounts of cumulative rainfalls, provides a discharge peak from the design hyetograph less affected by a smaller cumulative rainfall depth for extreme rainfall. Furthermore, the effects of global climate change indicate that future discharge peaks will increase by up to three times of those of Present-term peaks, which may result in difficult flood control for the downstream river reaches.
Keywords: flood; design hyetograph; Tsengwen Reservoir watershed; global climate change flood; design hyetograph; Tsengwen Reservoir watershed; global climate change
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kimura, N.; Tai, A.; Chiang, S.; Wei, H.-P.; Su, Y.-F.; Cheng, C.-T.; Kitoh, A. Hydrological Flood Simulation Using a Design Hyetograph Created from Extreme Weather Data of a High-Resolution Atmospheric General Circulation Model. Water 2014, 6, 345-366.

AMA Style

Kimura N, Tai A, Chiang S, Wei H-P, Su Y-F, Cheng C-T, Kitoh A. Hydrological Flood Simulation Using a Design Hyetograph Created from Extreme Weather Data of a High-Resolution Atmospheric General Circulation Model. Water. 2014; 6(2):345-366.

Chicago/Turabian Style

Kimura, Nobuaki; Tai, Akira; Chiang, Shen; Wei, Hsiao-Ping; Su, Yuan-Fong; Cheng, Chao-Tzuen; Kitoh, Akio. 2014. "Hydrological Flood Simulation Using a Design Hyetograph Created from Extreme Weather Data of a High-Resolution Atmospheric General Circulation Model." Water 6, no. 2: 345-366.


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