Tamsir SOE-OMVS *

Observatoire de l’Environnement

International workshop on water allocation and Green growth

Wageningen – 22 & 23 nov. 2012

TAMSIR NDIAYE Director of Environment and Sustainable Development of the OMVS – DAKAR (SENEGAL) Tél: +221 77 450 05 20Email: ndiayetamsir2002@yahoo.frTamsir SOE-OMVS

Senegal River Basin Physical characteristics

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Located in the western part of Africa between latitudes 10 °30 and 17°30 and longitudes 7 ° 30 'and 16 °30Area of about 345,000 km ² Drained by a river 1800 km longDivided into three main areas: upper Basin - Valley and DeltaFour riparian states (Mali, Mauritania, Senegal, Guinea).Source: Fouta Djallon (Guinea).

Senegal River Basin

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OMVS (in 1972) - Objectives and Missions● Main objective: an integrated cooperation tool between riparian

states for coordinating the development of Senegal River basin « with everyone, for everyone »

● Main missions:

● Reduce riparian states economic vulnerability against hydrologic and climatic uncertainties and exogenous variables;

● Ensure conditions for food security for basin populations;

● Enhance economic development by fostering a solidarity use of basin opportunities;

● Preserve the overall balance of the senegal river hydrosystem;

● Secure and enhance incomes of basin populations.

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● The Convention on the establishment of the OMVS of 11 March 1972 ;● The Convention on the Legal status of the River of 11 March 1972 ;

● The Agreement on the OMVS Privileges and Immunities of 18 April 1977;

● The Convention on the Legal Status of Jointly Owned Structures of 21 December 1978 ;

● The Convention on the financing modalities of the Joint Owned structures of 12 May 1982 ;

●The Convention on the establishment of the Société de Gestion et d’exploitation de Diama (Agency for the operational Management of the Diama Dam) - 07 January 1997 (SOGED) ;

● The Convention establishing the Société de Gestion de l’Energie de Manantali (Manantali Dam Operation and Management Agency - 07 January 1997 (SOGEM) ;

● The Charter of Waters of the Senegal River(28 May 2002) :

●Convention on the establishment of the Société de Navigation du fleuve Sénégal (SONASE) or the Inter-states Navigation Management and Operation Agency in 2005;

●The International Code of Navigation and Transport on the Senegal River in 2006.

Legal instruments

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● Conference of Heads of State and of Government●Decision-making Body●Regular meetings every two years● Council of Ministers;● Policy and supervisory Body●Two regular meetings per year + special meetings● High-Commission;●Executive Body● SOGEM (OMVS’ asset holding Agency)●Management and operation of the hydropower system of Manantali●Control of the private Operator of Manantali hydropower Plant● SOGED (OMVS’ asset holding Agency)●Management and operation of the DIAMA Dam hydrosystem●Promoting navigation on the Senegal River;●SOGENAV

●Management of navigation on the Senegal River

OMVS Permanent Bodies :

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●Permanent Water Commission;● Advisory body to the Council of Ministers● Meets every 3 months●Set guidelines for allocating the River water resources among use sectors ●Basin Committees●harmonization of planning projects and programs to be implemented in the Senegal River Basin● National Coordination Committees;● interface at national and regional levels● Local Coordination Committees. ●Interface at local and national/regional● Consultative Committee ;● formal annual meeting, but a permanent dialogue

OMVS Consultative Bodies

other tributaries

Bakoye

Bafing

Falémé

MANANTALI

Senegal River- Flow regime

GOUINAFELOU

GOURBASSI

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OMVS first generation Regional Infrastructure(Common structures) :

Barrages de MANANTALI Barrage de DIAMA

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●Block seawater intrusion;●Potable water supply to

populations year round (Agriculture, livestock,……);

●Irrigation Capacity of 120 000 ha;

●Improved filling conditions of lakes and depressions (wetlands);

●Regeneration of the vegetal cover and aquifers recharge;

●etc.

DIAMA Dam

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●5 groups of 40 MW each;

●Intalled capacity of 200 MW;

●Generation of 800GWh / year, garanteed 9 years out of 10;

Hydro power Plant of Manantali

HC- OMVS - Séville, juin 2007 *

In terms of Telecommunication●The ground cable of the power transmission

lines, executed in fiber optics technology, allows for the interconnection of the Member States’ telecommunication networks and for the transit of 30200 simultaneous telephone communication links or of 48 TV channels.

HC- OMVS - Séville, juin 2007

HC- OMVS - Séville, juin 2007 *

Other Structures ancillary or auxiliary to Diama and Manantali Dams

●The Manantali and Diama reservoirs; ●Left and right bank dikes;●More than120.000 ha of irrigated

land ;●Water intake and /or filling structures;●Access roads to the dams●Road links between the basin areas

HC- OMVS - Séville, juin 2007

Issues on filling up the DAMS

Félou Dam under Construction – completion and production start-up in

the first quarter of 2013

Gouina Dam site - construction starts in 2013

HC- OMVS - Séville, juin 2007 *

OMVS Operational arrangements

Conference of Heads of State and of Government

Council of Ministers

SOGEDManagement of water at

DIAMA SOGEMElectricity Management

Of Manantali

High commissionof OMVS

ConsultativeOrgans

CPE

CRP

CC

National Coordination UnitsOf OMVS STATES

Advice

Policy Directives

LCC

HC- OMVS - Séville, juin 2007

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Mechanism for processing the multiple uses of water resources’ demands in OMVS

Member States(Initiative)

COUNCIL OF MINISTERS(Decision)

HIGH-COMMISSION(Instruction)

Permanent Water Commission(CPE)(Advice)

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Multiple Water uses in the Senegal River Basin

● Water consumption uses● Irrigation● Potable water supply● Hydropower generation● Artificial flood(flood recession cropping)● Instream flows(environmental flows,

fisheries, navigation)● Flood control(reservoir levels)

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Water resources allocation process between the multiple uses by the Permanent water Commission

● Using management models:■ Ensure a balance between the resources available and the

users needs (Strategic Management)● Define the objectives for meeting the demands

■ Quantify the volume of different water consumption uses;■ Set priority levels for each demand,■ Takes into account other non consumptive water uses

(hydroelectricity, navigation, etc.), representing management constraints

● The fundamental issue involves trade-offs between uses

Define rules for demand management (releases vs. adjustment of uses) which allows for a control of the balance terms on the whole strategy.

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Strategic operational management(1)computing a variable annual allocation for the coming

year (uncertain future) :

● Prudent management which involves adjustment of the annual allocation to various users between minimum allocation and maximum allocation: demand management by anticipation

● Anticipation based on storage forecasts, and the river flow system inflows),

● the allocation is calculated annually in June with the possibility of adjustment in November, March to take into account the actual amounts of inflows,

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Strategic operational Management(2)During campaigns

1 - at the beginning of each water year (June) decision-making tool for the manager: a provisional allocation is calculated for each use between the minimum allocation and maximum allocation valid for the coming year,

2 – at each change of crop season (3 seasons), readjustment of allocations for the coming season:

3 - the actual observed hydrology (volume) is taken into account, possibility to refine forecasts, adjustment compared to actual consumption in a given range of variation

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Strategic operational Management(3)

Results of the application of strategic management:● Allocations forecasts by use,● Manantali releases forecasts● Projected balance in reach with detailed sections● Hydrograph estimates at Bakel

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Observatoire de l’Environnement de l’OMVS

Un outil stratégique de Veille pour le suivi de l’état de l’Environnement et des ressources naturelles du Bassin

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Environmental Observation System of the Senegal River (SOE-FSEN)

Serveur Poste Client Logiciel SIG

Base de Données

SOE_OMVS

Calcul des Indicateurs

OmvsOptionsLocales

Traitement

Automatique

Omvs_RqOL_Map

Données PFNT

Par Pays

Traitement Automatique

Tamsir NdiayeTamsir Ndiaye

Tamsir SOE-OMVS *

Thank you for your Attention

Tamsir SOE-OMVS