Konkuk University Climate Research Institute Typhoon Damage Impact Assessment Of Young-dong Region,...

Konkuk University Climate Research Institute

Typhoon Damage Impact Assessment Typhoon Damage Impact Assessment Of Young-dong Region, KoreaOf Young-dong Region, Korea

Park, Chang yong, Graduate Student, Department of Geography, College of Science,

Konkuk University, [email protected]

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•Hazard can be defined as the phenomena which human beings are damaged by natural or man-made actions.

HAZARD

NATURAL MAN-MADE

IntroductionIntroduction

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NATURALHAZARD

METEOROLOGICALHAZARD

GEOLOGICALHAZARD

HYDROLOGICALHAZARD

EXTRATERRESTRIALHAZARD

METEOROLOGICALHAZARD

HEAVYRAINS

HURRI-CANES

TROPICALSTORMS

TYPHO-ONS

TORNA-DOS

SNOWSTORMS

ICESTORMS

THUND-ERSTOEMS ETC.

•As the major factor of meteorological hazard occurrence, typhoon cause wind hazard and flood in Korea.


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Damage’s rank

YearMonth,

DayDamage factor

Refugee Loss of lifeEconomic loss

(US $)

1 2002 8.30-9.1Typhoon(RUSA)

63,085 246 5,595,562,190

2 1998 7.31-8.18 Heavy rain 24,531 324 1,402,573,821

3 1999 7.23-8.4

Heavy rain∙

Typhoon(OLGA)

25,327 67 1,204,117,835

4 2002 8.4-8.11 Heavy rain 8,107 23 997,969,509

5 1990 9.9-9.12 Heavy rain 187,265 163 821,923,520

6 1987 7.15-7.16Typhoon(THELMA)

99,516 345 671,118,420

7 1995 8.19-8.30

Heavy rain∙

Typhoon(JANIS)

24,146 65 616,932,118

8 1987 7.21-7.23 Heavy rain 50,472 167 565,126,085

9 1996 7.26-7.28 Heavy rain 16,933 29 560,158,117

10 2002 7.25-7.27 Heavy rain 54,041 128 484,347,400

Rank of meteorological hazard in Korea by economic loss


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Economic losses of meteorological hazard classified by the factor for the period of 1993-2002

(US $)

Etc.

6,502,382,450

4,354,683,213

48,153,303

2,104,628,786


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•The number of typhoons are formed an annual average of twenty eight over the Northwestern Pacific Ocean.

•There come more or less 9 typhoons invaded into Korea, however, two or three typhoons affected badly or landed in Korea.

•The strong typhoon usually arrived in August and affected in the order of July and September.


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•Young-dong region in the Gangwon province was severely damaged due to consecutive 2 years typhoon "Rusa" in 2002 and typhoon "Maemi" in 2003.

•Generally, the number of losses of life have been decreased, while economic losses have been increased due to the development of technology.


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Konkuk University Climate Research Institute8/25

The purpose of the studyThe purpose of the study

•Aimed to examine- the frequency, - the magnitude - direct/indirect damages

•Suggest to mitigate the advert impact of typhoon in the study area


The study areaThe study area

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•Data for grading of characteristics and impacts- precipitation, loss of life, economic loss, social impact

•Data to define total impacted areal extent - Typhoon track data

DataData

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•Study period of typhoon track and the amount of precipitation are from 1974 to 2003.

•In case of typhoon damage, study period is from 1991 to 2002.

•For the amount of precipitation, data of the weather station in localized land forecast area is used.

•Sokcho, Gangneung and Daegwallyeong have existed data of whole study period, Donghae and Taebaek have exist data since 1992 and september 1985 respectively.

DataData

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•Typhoon magnitude generally estimate to considerate central minimum pressure or central maximum wind speed.

•These definitions show the lowest central minimum pressure and the highest wind speed during the lifetime of typhoon until from the formation to the termination of typhoon.

•Thus, these definitions lack the regionality.

MethodsMethods

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•It is better to use the amount of precipitation than air pressure because this study is typhoon damage impact assessment of the regional scale.

•Therefore, this study estimate the magnitude of typhoon invading in the Young-dong region using the amount of daily precipitation observed in five weather stations (Sokcho, Gangneung, Daegwallyeong, Donghae and Taebaek).

MethodsMethods

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•The total number of typhoons occurring in the Northwestern Pacific Ocean from 1951 to 2004 are 1,444.

•Among these, 176 events invaded in Korea. Monthly distribution of typhoons

The trend and the magnitude of typhoonThe trend and the magnitude of typhoon

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Yearly distribution of typhoons

Year


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•The amount of precipitation due to typhoon invading in the Young-dong region has been increasing but it is not significant statistically.

Typhoon names invading in Gangneung and the amount of precipitation


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•Frequencies of the extreme precipitation event due to typhoon have increased.

1974 -1994

1994-2003

Sokcho 3 6

Gangnueng 6 5

Daegwallyeong

5 5

Frequencies above total precipitation 200mm due to typhoon during 1974-1994 and 1994-2003


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•Typhoon "Rusa" in 2002 caused the record heavy rain of 422mm in Sokcho, 760mm in Daegwallyeong and 898mm in Gangneung.

•Therefore, the frequency and the magnitude of typhoon affecting in Young-dong region have been increasing.

1974 -1999 1999-2003

Sokcho 0 1

Gangnueng 0 2

Daegwallyeong

1 2

Frequencies above total precipitation 400mm due to typhoon during 1974-1999 and 1999-2003


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Typhoon “Rusa” track Satellite image of typhoon “Rusa”

Damage analysis in Young-dong regionDamage analysis in Young-dong region

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Typhoon damages in Young-dong region

Year Loss of life Refugee Economic loss (US $)

1991 4 752 7,771,240

1992 246 4,014,631

1993 1 253 34,866,558

1994 11 13 6,221,782

1995 4 69 25,837,686

1998 1 1,537,004

1999 1 22 11,649,966

2000 107 20,918,553

2002 143 41218 2,722,203,825


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Classification of economic loss (US $)

Year Structure ShipAgricultural

landPublic facility Other facility

1991 2,500 8,095 7,630,681 129,963

1992 625 804 11,215 7,927,936 3,842,790

1993 106,661 49,467 1,583,790 32,315,440 811,198

1994 19,128 100,455 47,234 3,100,502 2,954,461

1995 33,466 10,008 1,966,563 23,381,067 446,581

1998 8,696 563,603 964,705

1999 191,847 25,603 11,170 5,577,536 5,250,329

2000 44,021 8,616 15,049,010 5,816,904

2002 86,810,869 329,552 301,605,035 2,121,846,282 211,612,084


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•Gangneung city is damaged the most extremely.

•Typhoon "Rusa" is estimated to cause 53 losses of life and 869,565,217$ in economic loss in Gangneung city.

•Damages in Samcheok city is estimated to be 25 losses of life and 510,869,565$ in economic loss and yangyang-gun is 23 losses of life and 456,521,739$ in economic loss.

•This area has not been recovered from the impact of typhoon “Rusa” yet, however, in 2003, typhoon “Maemi” invaded again destructed severely.


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•Frequencies, total amount of precipitation and heavy rain due to typhoon invading in Young-dong region have been increasing.

•Due to the advance of the hazard prevention system, the number of losses of life have decreased but economic losses have increased.

•Especially, public facilities were damaged the most extremely.

•Therefore, in order to make preparation for these situations, a hydrological system considering inflow and outflow is required.

Results and suggestionsResults and suggestions

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•The Korean Government adjusted construction and structure design criteria level practically due to typhoon "Rusa" in 2002 and "Maemi" in 2003.

Adjusted construction and structure design criteriaconstruction and

structure design criteria Enhanced level

Design frequency of road drainage system

5 years → 10 years

Flood design frequency (provincial river)

50~100 years → 50~200 years

Levee enlargement (slope gradient)

1:2 → 1:3


•Central government should greatly enhance construction and structure design criteria level which are consulted with experts from a variety of fields.

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•Rapid recover of government to be not damaged the same next the year is required.

•In order to mitigate the economic cost and the human loss, strengthening of preparedness activities such as planning, training, exercises & drills, emergency awareness & education and warming are required.


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Thank you for your attentionThank you for your attention

Konkuk University Climate Research Institute Typhoon Damage Impact Assessment Of Young-dong Region,...

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