Wetland of International Importance (Ramsar Site) · ben
Basse Vallée de l'Ouémé, Lagune de Porto-Novo, Lac Nokoué
- Area
- 6 532 km²
- IUCN cat.
- V
- Year
- 2000
Overview
- Designation
- Wetland of International Importance (Ramsar Site)
- IUCN category
- V · Paysage protégé
Paysage façonné par l'humain digne de conservation
- Established
- 2000
- Managing authority
- Full information available from the Ramsar Sites Information Service (RSIS) website - https://rsis.ramsar.org/ris/1018
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
4 903 distinct species · 272 102 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 50 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Basse Vallée de l'Ouémé, Lagune de Porto-Novo, Lac Nokoué : 50 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) + 0 bulles famille, 47 interactions GloBI documentées sur 4 types (connectance 3.8%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology19 basins · 15 lakes · 18 rivers
Hydrology metrics for this exact territory
Stream length here
313,3km
Lake surface here
189,61km²
Basins crossed
19
Max stream order
6
Max drainage
59 908km²
Discharge in basins
1 395,7m³/s
Mean precip.
1 143mm/an
Mean T°
27,4°C
Moisture idx
-0,29
Mean runoff
344mm/an
Mean elev. (basins)
56m
Watersheds crossing here
- Bassin de Sôsub-area2 064 km²overlap1744.11 km²27%
- Bassin de Ouémésub-area1 289,8 km²overlap1284.17 km²20%
- Bassin de Djonousub-area1 149,6 km²overlap1138.66 km²17%
- Bassin de Gli-Awoyosub-area1 014,7 km²overlap840.35 km²13%
- Basin #43130sub-area722,2 km²overlap282.44 km²4%
- Bassin de Ouémésub-area2 657,5 km²overlap231.01 km²4%
- Bassin de Nidomeysub-area174,6 km²overlap173.87 km²3%
- Bassin de Canal d'Akôdjisub-area141,1 km²overlap136.99 km²2%
- Basin #23070sub-area205,9 km²overlap121.18 km²2%
10 more basinssorted by overlap
- Basin #64480sub-area131,4 km²overlap101.93 km²2%
- Bassin de Couffosub-area3 663,6 km²overlap100.61 km²2%
- Bassin de Zousub-area1 466,1 km²overlap99.14 km²2%
- Bassin de Chenal de Cotonousub-area43,9 km²overlap43.68 km²1%
- Bassin de Badagry Creeksub-area217,9 km²overlap43.12 km²1%
- Bassin de Yewasub-area1 213,4 km²overlap42.28 km²1%
- Bassin de Yewasub-area596,6 km²overlap39.51 km²1%
- Bassin de Chenal de Cotonousub-area16 km²overlap15.93 km²0%
- Basin #23060sub-area40,4 km²overlap14.17 km²0%
- Bassin de Ouémésub-area5,3 km²overlap5.30 km²0%
Lakes (15, top by area)
- Nokouearea174,9 km²avg depth1.2 m
- Lac Tôhoarea8 km²avg depth5.0 m
- Lake #80355area2,6 km²avg depth0.7 m
- Lake #80279area1,6 km²avg depth2.1 m
- Lac 1405541area0,6 km²avg depth2.5 m
- Lac 1405560area0,6 km²avg depth1.5 m
- Lac 1405568area0,5 km²avg depth2.8 m
- Lac 1405492area0,4 km²avg depth1.1 m
- Lac 1405500area0,3 km²avg depth0.5 m
Rivers / streams (18, ord ≥ 4)
- Ouéméord 6len here130.88 km14%total909 km
- Sôord 4len here59.61 km100%total60 km
- Canal d'Akôdjiord 1len here13.35 km100%total13 km
- Gli-Awoyoord 4len here13.27 km100%total13 km
- Djonouord 3len here12.78 km100%total13 km
- Zouord 5len here12.55 km4%total356 km
- Canal d'Agonguèord 1len here11.32 km100%total11 km
- Tovèord 2len here9.17 km100%total9 km
- Dohouiord 2len here9.17 km100%total9 km
- Kouléord 4len here8.32 km92%total9 km
- Nidomeyord 1len here7.65 km100%total8 km
- Chenal de Cotonouord 6len here6.48 km100%total7 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Location
Fond cartographique : OpenFreeMap · © OpenStreetMap contributors · Géométrie : nos sources (GADM/HydroBASINS/HydroLAKES/HydroRIVERS/WDPA)
- Centroid
- 6.77147, 2.46275
- Open in maps
- OpenStreetMap → · Satellite →
Species observed (Phase 2)
Listing species observed within this protected area requires the GBIF v2 partition × WDPA spatial overlay matview. Computing infrastructure pending.