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Typhoon Hagibis caused severe flooding and damage to the riverbed environments of the Tama River, in October 2019. Damages and consequent changes to the riverbed environments, particularly to the population of Aster kantoensis Kitamura (Kawara-nogiku), an endangered plant species, in Hamura City were investigated. Although the flood had severely harmed the flora population, the two-year period following the disaster allowed the population to regenerate. The wind direction frequency surrounding Hamura, which is influenced by geomorphological conditions, may have proved advantageous for maintaining A. kantoensis populations. |
