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| Titel |
The Estimation of Future Pump Capacity for the Urban Drainage System under Climate Change |
| VerfasserIn |
Narae Kang, Huiseong Noh, Yonsoo Kim, Jongso Lee, Hungsoo Kim |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250075884
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| Zusammenfassung |
| In the recent years, flash flood and local heavy rainfall have been frequently occurred in Korea
and this may be due to the climate change. Korea Meteorological Administration(KMA)
and IPCC AR5 reported new greenhouse gas scenario called RCPs(Representative
concentration pathways) which are becoming an interesting subject in the field of water
resources.
These days, the urban areas in the Korean Peninsula have been suffered from
the floods, almost every year, by the localized heavy rainfall and this abnormal
rainfall may be due to the climate change. Also, the runoff in the urban area has
increased due to the rapid urbanization and so the current design rainfall could not
be proper any more for accommodating the abnormal runoff capacity. When we
determine the frequency of drainage facilities, the maximum flood discharge from the
recorded rainfall intensity is used as the design capacity of the facilities. However,
there is a need to examine the future rainfall tendency for the re-establishment of
the design criteria of the facilities under the climate change, since the recorded
rainfall intensity does not reflect the trend of the abnormal rainfall which can be
occurred.
This study tries to analyze the variability and trend of future rainfall using RCP scenarios
and estimate the future capacity at existing pumping station for the urban drainage system.
The future projection periods are set to the next 90 years(2011-2100) and are divided into
three cases; Target I : 2011~2040 yrs, Target II : 2041~2070 yrs, and Target III : 2071~2100
yrs. The study area is Incheon-city, Korea which has 9 pumping stations. According to the
RCP 8.5 scenario which is the worst scenario of RCPs, the Target I design rainfall is
increased by 20%, Target II increased by 33%, and Target III increased by 74% compared
with the reference period(1970-2010).
When considering the impact of climate change, 3 of 9 pumping stations are expected to
have no difficulty in the future rainfall. But, the capacities of 6 pumping stations will not be
sufficient for the future rainfall and runoff. Therefore, it is expected to construct more
pumping stations allowable 6 times of existing pump capacity especially for Target
III(2071-2100).
ACKNOWLEDGMENT
This research was supported by a grant ‘The development of disaster risk assessment
technique for flood prevention facilities considering the multi risk factors’ [NEMA-NH-2010-33]
from the Natural Hazard Mitigation Research Group, National Emergency Management
Agency of Korea. |
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