Abstract
In Isikari-gawa basin, many trees were blown down by the strong typhoon which passed by Hokkaido in 1954. Computing the unit-hydrographs (Fig. 3) by means of the method of least square (associated linear equations (5)), the author concluded that the runoff in 1956 (after the disaster) is uniformly larger than in 1952. Data of rainfall and water-level were obtained at So-unkyo and Simo-Aibetu respectively in July, August and September (Fig. 1). Fig. 2 (correlograms of rainfall) and Table 1 (r: average daily rainfall, σ: standard deviation of rainfall, f: percentage of the number of days in which it rained more than 10mm, rm : maximum daily rainfall, and h: average water-level) show that hydrological conditions in these three years were not different each other.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Transactions of the Japan Society of Civil Engineers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
