DIURNAL VARIATION OF RAINFALL PROFILES BASED ON 120YEARS HOURLY DATA AT TOKYO
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- WADA Takuya
- Graduate School of Engineering Hokkaido University
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- YAMADA Tomohito
- Graduate School and School of Engineering Hokkaido University
Bibliographic Information
- Other Title
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- 東京における120年時間降雨量データを用いたひと雨降雨形態の日変化形の検討
Abstract
Various problems concerning the global environment such as climate change, urbanization, and the heat island phenomenon are paid to attention, especially in terms of rainfall characteristics. This paper focused on characteristics of diurnal patterns of rainfall at Tokyo (Ohtemachi) based on 120-years hourly data from 1890 to 2008. Diurnal patterns were analyzed by using the "P/D" diagnostics which indicates the shape of a single rainfall event by the peak rainfall amount and its duration (whole duration). The P/D diagnostics showed the intensification of short-time rainfall amount in recent. In addition, we proposed a new "P/D" diagnostics which indicates the shape of a single rainfall event with the peak rainfall amount and its duration (from the starting time to the peak time). The results we obtained are following. 1) There is an increasing tendency in the short-time afternoon rainfall. 2) The duration to reaching peak amount for each single rainfall event is clearly decreased particularly at 15LST and 19LST in the recent two decades.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 67 (4), I_481-I_486, 2011
Japan Society of Civil Engineers
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Keywords
Details
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- CRID
- 1390001205353051392
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- NII Article ID
- 130004557618
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- ISSN
- 2185467X
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed