Taisei MORISHITA, Hiroaki SAITO and Shin TANI
Transcript of Taisei MORISHITA, Hiroaki SAITO and Shin TANI
Taisei MORISHITA, Hiroaki SAITO and Shin TANIHydrographic and Oceanographic Department (JHOD)
Japan Coast Guard
1. Earthquake and Tsunami (review)
2. JHOD’s Response Activities (overview)
3. Hydrographic Surveys
4. Progress and Future
Sendai
Tokyo
Osaka
100 km
Okinawa
Tokyo
Sapporo
PacificOcean
JapanSea
Pacific Plate
North American Plate
M9.0
14:46March 11, 2011
focalregion
FukushimaNuclear Power Plant
Sato et al.(2011) Science
Seafloor geodetic observation by JHOD
Sato et al.(2011) Science
Seafloor geodetic observation by JHOD
Navigational warning
Drift trajectory prediction
Hydrographic surveys
Seafloor geodetic observation
Revision of nautical charts
Phase 1 (from March to April)
surveys for access to ports and harbors
Phase 2 (from May)
surveys for revision of nautical charts
Tokyo
Sendai
major citiesalong the coast
geographical condition ofdevastated areas spotted along the long east
coast failures of on-land transports
isolated
needs for delivery ofrelief supplies by sea
GTN: 430 tCompleted: 1986
GTN: 550 tCompleted: 1993
GTN: 550 tCompleted: 1990
Tokyo
Sendai
GTN: 3,000 tCompleted: 1998
GTN: 2,400 tCompleted: 1983
HL02 Takuyo
HL01 Shoyo
HL04 Tenyo
HL03 Meiyo
HL05 Kaiyo
Tokyo
Sendai
HL02 Takuyo
HL01 Shoyo
departed within 24 hours.departed on 14 March
HL04 Tenyo
HL03 Meiyo
HL05 Kaiyo
@Ofunato @Kesennuma
damaged quay
boatDrifting house
Used instrumentsSide scan and interferomeric sonar
SYSTEM 3000, SYSTEM3900, CM2Multibeam echo sounder
(onboard craft) SEABAT8125(mother vessel) SEABEAM1180, EM710S, EM302, SEABEAM2112
Single-beam echo sounder(onboard craft) PDR-601, PDR-8000
fishing net
@ShiogamaDivers from Maritime Self-Defense Forces
(to remove tangled nets and ropes)
Onahama Harbor
36-55-24.2 N140-52-10.7 EHeight 2.4 mDepth 6.0 m
SeaBat 8125
Collapsed quay
Collapsed quay
Crane
Collapsed
Soma Harbor, Fukushima
Fallen crane from the quay
Rubbles
( Tide correction is not applied yet )
Plotting the detected sea-bottomobstructions on a nautical chart
Obstruction
Depth 11.3mRelative height 2.0m
Depth 9.4mRelative height 1.5m
Sendai Section of Port of Sendai-Shiogama
Find them and clear a channel
clearing operation
Informing the results to the port authority
Hydrographic service vessel Kaiyo
March 15, 2011Port of Kamaishi Navigable Area Map
Quay
500 m
Hachinohe
Miyako
Kamaishi
Kesennuma
Shiogama
Onahama
Ofunato
Kuji
Soma
Sendai
19 Mar.
19 Mar.
15 Mar.
21 Mar.18 Mar.
(Date of re-open)
17 Mar.
20 Mar.
22 Mar.26 Mar.
19 Mar.
Phase 1 (from March to April)
surveys for access to ports
Phase 2 (from May)
surveys for revision of nautical charts
VerticalHorizontalon land (by GSI)on seafloor (by JHOD)
epicenter
epicenter
on land (by GSI)on seafloor (by JHOD)
Tokyo
Sendai
Hachinohe
Choshi
Miyako
Kamaishi
Kesennuma
Shiogama
Onahama
Ofunato
Kuji
Soma
Hitachi-naka
Oh-arai
Kashima
0.03 cm
0.22 cm
0.82 cm
0.45 cm
0.18 cm
0.26 cm
0.12 cm
0.34 cm0.43 cm
0.71 cm
(subsidence)Before the earthquakeAfter the earthquake
Ref. point
subsidence
re-determine
chart datum(N.L.L.W)
(from April)
Sendai SEABEAM 1180
HL04 Tenyo
onboard craft
SEABAT 8125~2 m deeper
~0.5 m deeperShiogama
“Smoot Sheet”
Port of Sendai-Shiogama (Shiogama Section)
Zone of Confidence Diagram
Assessed.Survey after the earthquake
Unassessed.Survey before the earthquake
U
(from September)
Kamaishi
Sendai
South North
670 m 990 m300 m
basal part
basement
-19 m
-63 m
The breakwater was BROKEN by WATER!!N
caisson
water depth: -35 m.
-19 m-30 m
Breakwater(submerged)
Sendai
Data request from the authority for water and disaster management
mapped by Geospatial Information Authority of Japan (GSI)
inundated area
surveyed area
5 km
LIDAR
SHOALS-1000
school
Watari
Yamamoto
Before
school
Watari
Yamamoto
After
No. 5
No. 7
No. 9
No. 11
No. 7
No. 9
No. 11
Aerial photos
>15 m
0 m
<-10 m
(m)No. 7
No. 9
No. 11
Watari
Yamamoto
LIDAR topography
sand bars
groyne
[12 Mar. 2011]
[June 2011]
Sendai
Hachinohe
Miyako
Kamaishi
Kesennuma
Shiogama
Onahama
Ofunato
Kuji
Soma
Hitachi-naka
Oh-arai
Kashima
Ishinomaki
Tokyo
6 Aug.
(from Oct.)
(start after dredging by the P.A.)
7 Sep.
17 Sep.
7 Jul.(from Oct.)
27 May
27 Aug.
29 Jul.
5 May15 May
29 Jun.
Survey(completion)
12 Sep.
4 Aug.4 Aug.
InterimInfo. map
9 Sep.9 Sep.
Revisionof Chart
(Oct.)
(by Mar. 2012)
(by Mar. 2012)
(by Mar. 2012)
(by Mar. 2012)
JHOD will revise charts for major portswithin one year after the disaster.
Indispensable role of hydrographic surveysin natural disasters to provide information necessary to ensure the
safe navigation as soon as possible
To keep and share lessons from the past prompt and appropriate actions flexible nationwide allocation of resources interorganization cooperations
To keep survey skills and resources in anordinary time
Thank you for your kind attention!