Implementation of the water framework directive

Global testing of the three step approach to a river basin

Mars 2002 - DCE/analyse économique - 2

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Mars 2002 - DCE/analyse économique - 3

The Sèvre Nantaise river basin

2370 km2

290 000 habitants Drinking water : 10.6 Mm3/year, 3 dams

+ importation Irrigation : 12 Mm3 per year Industry : 96 main industries fishing, boats, tourism

Mars 2002 - DCE/analyse économique - 4

What is expected ?

Feasability of the method ? Data availability ? Lessons and limits of the case study ?

Mars 2002 - DCE/analyse économique - 5

The method

Baseline scenario till 2015 = basic measures = scenario 1

Case n°1 :No gap from good water status :

scénario 1

Case n°2:Gap

Supplementary measures

Case n°2 :

no disproportionate costs scenario 2

Case n°3 : disproportionate costs scenario 3

Mars 2002 - DCE/analyse économique - 6

Scenario 1 = basic measures

Depollution in livestock farms Urban depollution ( carbon pollution) Increase of stream during dry season Zones of protection for drinking water

Cost = 6.1 million € per year

Mars 2002 - DCE/analyse économique - 7

Scenario 2Scenario 1 +

Extending protected zones Treatment of phosphorus and nitrates Treatment of bacteriological pollution Grass belts Restoration and preservation of rivers Developing tourism

Cost = 17.6 million € per year

Mars 2002 - DCE/analyse économique - 8

Scenario 3 = «reduced» scenario 2

Supplementary measures are limited to drinking water protection Scénario 1 +

Extending protected zones Treatment of phosphorus and nitrates Grass belts

Cost = 8.3 million € per year

Mars 2002 - DCE/analyse économique - 9

Scenarios CostsM€ / year

ProfitsM€ / year

1 6.1 2

2 17.6 11 to 13

3 8.3 3

Profits : drinking water treatment, fishingWith bad assessment of non marketable profits

Mars 2002 - DCE/analyse économique - 10

Rate of cost recovery(without environmental and non marketable costs)

Users rate

Domestic 90 %

Irrigation from a riverrealimented by a dam

34 %

Irrigation from a smallreservoir

33 %

Irrigation individualborehole

110 %

Mars 2002 - DCE/analyse économique - 11

Limits and lessons (1/2) Heterogenity of data : geographical scale and

reliability Unavailable data : on unitary benefits, water

pricing for industry Lack on monetarized data for both

environmental costs and benefits

Mars 2002 - DCE/analyse économique - 12

Limits and lessons (2/2)

The link between technical and economic activities needs to be strengthened

The scoping activity doesn’t allow to test comprehension and acceptability of local stakeholders