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Article

The Impact of Multiple Typhoons on Severe Floods in the Mid-Latitude Region (Hokkaido)

Institute for Rural Engineering, National Agriculture and Food Research Organization (NARO), 2-1-6 Kannondai, Tukuba, Ibaraki 305-8609, Japan
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Water 2018, 10(7), 843; https://doi.org/10.3390/w10070843
Received: 16 May 2018 / Revised: 14 June 2018 / Accepted: 20 June 2018 / Published: 25 June 2018
(This article belongs to the Special Issue The Application of Hydrologic Analysis in Disaster Prevention)
Mid-latitude regions in the North Pacific are generally vulnerable to climatological disasters and are possibly more sensitive to future climate changes. Severe flood disasters struck Hokkaido in August 2016 because of the multiple, continuous typhoons that struck the island. We evaluated the effect of these typhoons on floods and changes in future floods using a distributed hydrological model in a watershed located in eastern Hokkaido. We conducted two numerical examinations: a simulation with a major typhoon only (which caused flood disasters) without other preceding typhoons, and a simulation with a simple assumed future climate (in which we employed higher precipitation). The result of the former simulation demonstrated that the impact of the preceding typhoons on the highest flood peak was significant during the early stage of the major typhoon but weaker after the middle stage of the major typhoon. The result of the latter simulation indicated that flood peaks potentially increased with an increase in precipitation. Based on the water level distributions in the surface layer, the impact of multiple typhoons and future weather conditions on potential flood peaks depends on the degree of soil saturation over our target watershed. View Full-Text
Keywords: flood simulation; Hokkaido; multiple typhoons flood simulation; Hokkaido; multiple typhoons
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MDPI and ACS Style

Kimura, N.; Kiri, H.; Kitagawa, I. The Impact of Multiple Typhoons on Severe Floods in the Mid-Latitude Region (Hokkaido). Water 2018, 10, 843. https://doi.org/10.3390/w10070843

AMA Style

Kimura N, Kiri H, Kitagawa I. The Impact of Multiple Typhoons on Severe Floods in the Mid-Latitude Region (Hokkaido). Water. 2018; 10(7):843. https://doi.org/10.3390/w10070843

Chicago/Turabian Style

Kimura, Nobuaki, Hirohide Kiri, and Iwao Kitagawa. 2018. "The Impact of Multiple Typhoons on Severe Floods in the Mid-Latitude Region (Hokkaido)" Water 10, no. 7: 843. https://doi.org/10.3390/w10070843

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