Bsm2008 I Made Andi Arsana

Bali Scientific Meeting 2008, Perancak, Jembrana Bali 18-19 March 2008

THE DELINEATION OF INDONESIA’S OUTER LIMITS OF ITS EXTENDED CONTINENTAL SHELF: STATUS AND PROBLEMS

I Made Andi Arsana

Monday 17 March 2008

Department of Geodetic EngineeringGadjah Mada University, Indonesia

I Made Andi Arsanahttp://madeandi.staff.ugm.ac.id

Monday, 17 March 2008

BSM 2008: The Delineation of Indonesia’s Outer Limits of its Extended Continental Shelf: Status and Problems

O I tit tiOur Institution…

Department of Geodetic EngineeringDepartment of Geodetic EngineeringGadjah Mada University

Jl. Grafika No. 2, Yogyakarta, 55281, INDONESIA

P: +62 274 902121 F: +62 274 520226

E: [email protected]

W: http://www.geodesi.ugm.ac.id




C t i

RussiaRussia

Current issues

RussiaRussia

CanadaCanada



MacNab (2004)


O tliOutline

• IntroductionIntroduction• Definition of ECS• The UN Commission• The Indonesian Case• The Indonesian Case

– Progress L– Latest status

• Concluding Remarksg• Acknowledgements




I t d tiIntroduction

Maritime jurisdictions – LOSCUnited Nations Law of the Sea Convention




I t d tiIntroduction

• Article 76 of LOSC: coastal States may Extend theirArticle 76 of LOSC: coastal States may Extend their Continental Shelf beyond 200 nautical miles Extended Continental Shelf.

• Delineating the outer limits of the ECS, making submission to the commission on the limit of continental shelf (CLCS) th h UN S t G lthrough UN Secretary General.

• Nine submissions have been made by Coastal States (as of y (March 2008 – Rus, Bra, Aus, Irl, NZ, Joint, Nor, Pra, Mex).

• Indonesia has potential for ECS but has not yet made anyIndonesia has potential for ECS but has not yet made any submission. Delineation is being undertaken

Deadline for submission is on 13 May 2009• Deadline for submission is on 13 May 2009.




D fi iti f ECS L lDefinition of ECS – Legal

200 nm350 nm

2500 m isobath + 100 nmEstablished baseline(either normal or straight)

60 nmdry land

continental shelf

low waterHedberg Line

continental crust

slope

continental rise

abyssalplain

Animated by I Made Andi Arsana -madeandi@ugm ac id ocean crustfoot of slope (FOS)

(max change of gradient)

sediment

[email protected]

1% sediment thickness (Gardiner Line)

Outer limit of CS Fixed points (lat, long)

(max. change of gradient)

Animated by I Made Andi Arsana - [email protected]




Foot of Slope (FOS)t = sediment thickness

f OS

t / D ≥ 1 %D = distance from FOS

Sediment t

t / D ≥ 1 %

D

<< back




M iti Z Li itMaritime Zone Limits

OceanOcean

Basepoints

G

Distance from basepoints

A B C

E

FEnvelop of arc

DMaritime zone limit

Land Irrelevant basepoint




CLCSCLCS

• CLCS: Commission on the Limits of• CLCS: Commission on the Limits of Continental ShelfAnne II to the UNCLOS• Annex II to the UNCLOS

• Guidelines (CLCS/11)• Membership: 21 experts in geology,

geophysics, hydrography, geodesy. Latest g p y , y g p y, g yelection: 14 June 2007

• Rules and Procedures (CLCS/40)Rules and Procedures (CLCS/40)• Roles and Function : technical assistance

and recommendationand recommendation




Th I d i CThe Indonesian Case

• Indonesia ratified LOSC in 1985LOSC in 1985

• Indonesia has ECS potentialsp

• Delineation and preparation being undertakenundertaken.

• No submission has been made

• Deadline for Submission: 13 May 2009May 2009




P t ti l f th I d i ECSPotentials of the Indonesian ECS

• Study of the Indonesian Experts• Study of the Indonesian Experts– To the west of Sumatra, to the north of Papua, and to the south of Sumba

FOS line

60 M distance line

FOS line

Gardiner

(Sutisna et al., 2005)




T d S b i i t th CLCSTowards a Submission to the CLCS

• Preparation of Submission• Preparation of Submission

Issues:Steering Committee Issues:

1. Mandate

Technical core group

2. Collaboration

Technical core group

Legal groupg g p





• Results of Work and Latest Development• Results of Work and Latest Development– Field survey (1996-2006)– Delineation [west of Sumatera]– Delineation [west of Sumatera]– Document preparation (draft)– More surveys [North of Papua]More surveys [North of Papua]– Plan vs. realization

(Photos by Widiastuti, 2006)





• Challenges and Solution• Challenges and Solution– Technical (human res & tech)– Institutional (collaboration)– Institutional (collaboration)– Financial (cost vs. benefit)– PoliticalPolitical

(Photos by Widiastuti, 2006)





W t f A hWest of Aceh• Submission

draft • Area=3915

km sq [?]P ti l f• Partial of bulk?

• Worth theWorth the effort?




Potential Boundary Disputes & Resolution




M iti B d D li it tiMaritime Boundary Delimitation

Fringing islands

State A Main landArchipelagic State B B

IslandFringing islands

Low Tide ElevationB liBaselines Internal WatersJudicial bayTerritorial sea Limit 12 nm

Contiguous zone Limit 24 nm

Continental marginEEZ Limit 200 nmOverlapping claimMaritime boundary

AMaritime boundary




M th d f M iti B d D li it tiMethods of Maritime Boundary Delimitation

Equidistance line construction

State A

Robust equidistance line between qState A and State B

State B




B k t th t i

RussiaRussia

Back to the current issues

RussiaRussia

CanadaCanada



MacNab (2004)


C l di R kConcluding Remarks

• ECS entitlement LOSC article 76• ECS entitlement LOSC article 76• ECS establishment procedures• Indonesia is delineating its ECS and has

yet to make submission to the Commissionyet to make submission to the Commission• Preparation submission in the near

f t (D b 2007[?])future (December 2007[?])• Challenges: technical, institutional, g , ,

financial, political




A k l d tAcknowledgement

• UN-Nippon of Japan Foundation Fellowship• UN-Nippon of Japan Foundation Fellowship• University of Wollongong

D t t f G d ti E i i UGM• Department of Geodetic Engineering, UGM




Thank you ☺



Bsm2008 I Made Andi Arsana

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