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Dr. T.Tomita, PARI Prof. Y.Kawata, DPRI, Kyoto Univ.

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Presentation on theme: "Dr. T.Tomita, PARI Prof. Y.Kawata, DPRI, Kyoto Univ."— Presentation transcript:

1 Field Survey Report on Earthquake Tsunami Disaster of Indian Ocean ~ Sri Lanka, Jan.4 - 6, 2005 ~
Dr. T.Tomita, PARI Prof. Y.Kawata, DPRI, Kyoto Univ. Prof. F.Imamura, Tohoku Univ. Dr. T.Arikawa, PARI Dr. T.Yasuda, DPRI, Kyoto Univ.

2 Locatgion of Epicenter and Bathymetry data
USGS: U.S. Geological Survey Hav: Harvard Univ.

3 Historical tsunami occurred in the Indian Ocean (Solov'iev and Go, 1975)
DATE LAT LON M m 1797/ 2/10 0.0°N 99.0°E 8.0 3.0 1833/11/24 2.5°N 100.5°E 8.3 2.5 1843/ 1/ 5 1.5°N 98.0°E 7.3 2.0 1861/ 2/16 1.0°N 97.5°E 8.5 1907/ 1/ 4 97.0°E 7.5 2004/12/26 3.316°N 95.854°E 9.0 4.0

4 South-West of Sri Lanka Island
Survey Locations South-West of Sri Lanka Island (2) Colombo Jan. 4 Moratuwa 5.6 Pana dula 6.0 Paiyagala Beruwala Jan. 6 4.7 Ambalangoda Hikkaduwa Dodanduwa 4.0 Galle Jan. 5 Koggala Weligama 4.9

5 Galle Bay Galle Buoy Port Cottage owner testified:
At first, the tide ebbed until buoy where the water depth is around 10-12m. Then, tsunami which height was 7m came into the bay.

6 Galle Port The ship was launched on the quay. 6.03m 5.28m 2.70 3.04
3.33 2.24 1.70 190.0m

7 Eastern coast from Galle Port (1)
View 1 Sand on Roof is left 4.79m Completely damaged 2.18 Road 2.61 2.53 68.0m Sand on the roof wasn’t flushed by tsunami view 1

8 Eastern coast from Galle Port (2)
View 2 3.24m Few damage Road 0.63 2.61 View 2

9 Galle Fort Most area was survived.

10 Galle Central 3.93m River 2.30 1.63 32.0m

11 Dodanduwa (1) Road 3.90m Bridge 3.88m 3.80m View 1 0.9 2.36 2.26 3.00 1.44 1.62 24.0m View 1 420 fishing boats damaged in this residential area.

12 Dodanduwa (2) previous slide Guide rail was broken View 2 View 2 sea
Two persons who rode on the motorcycle were washed away on the bridge by the tsunami.

13 Akurala (1) Splashed dead leaf The train floated and was washed away.
Washed train 10.04m Road Railway 9.15m Beach 1.97m 1.69m 64m 0.89m 188m 228m

14 Akurala (2) view 1 view 1 4.38m Road Beach 1.4m 0.08m 142m

15 Ambalangoda (1) 4.72m 3.22m Beach 50m

16 Ambalangoda (2) View 1 View 1 View 3 View 2 View 2 View 3 sea Estuary
Road sea Estuary View 1 View 1 Houses View 3 Railway View 2 View 2 View 3

17 Hikkaduwa Fishery Harbour
View 1 65 fishery boats were damaged in the port. View 1 4.73m 7m Tsunami trace on the 2nd floor Wharf No damage for the buildings

18 Beruwala Fishery Harbour
Harbour entrance is narrow. 2.35m 1.58m 1.0m 6m Wharf No damaged facilities

19 Pana dura Broken roof Seawall was damaged.
Shed 24m Rubble mound breakwaters 3.34m Floor of shed is broken by the tsunami lift force.

20 Houses made by brick or block were collapsed.
Houses made by concrete were less damaged.

21 Survey results of Tsunami height

22 GOSL planning of restoration
Sea I II III 0m 100m 300m 1000m I. No constructions II. Only permit constructions (e.g. hotels) III. Construction allowed with the permission of UDA GOSL also considers 3m elevation contour line.

23 Tsunami simulation by DRS, DPRI
Governing Equation Linear Shallow Water Theory in Spherical Coordinate System Spatial Grid Size 30 arc second Temporal Grid Size 1.8 s Bathymetry Data ETOPO2 Computational Domain SE(77°52'E, 10°24'S)- NW(111°12'E, 22°56'N) Seismic Deformation Yamanaka(2004) Computed Time 6 hrs Fault Parameter (Yamanaka, 2004)

24

25 Calculated Tsunami waveform
Output points

26 Thank you for your attention!
I'd like to send my deepest condolences to all victims.


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