Basse Vallée de l'Ouémé, Lagune de Porto-Novo, Lac Nokoué
IUCN VWetland of International Importance (Ramsar Site) · 2000
6 532 km²
Commune · BEN
Aguégués
Benin
AwTropical, savannah(100 %)
Species observed
1 481
Observations
7 872
Area
120,5km²
Ecological tissue
Graphe en cours d’indexation
Calcul du tissu écologique de cette entité.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 2s).
Species present
1 481 distinct species · 7 872 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
26,6°C
Annual rain
1 222mm
Warmest m°
30,2°C
Coldest m°
23,3°C
Elevation: -22 m on average (min -123 m, max 9 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
26,6°C
Annual rain
1 222mm
Warmest month
30,2°C
Coldest month
23,3°C
Mean alt.
-22m
Min
-123m
Max
9m
Std. dev.
37m
Köppen-Geiger (dominant)
AwTropical, savannah(100 %)Tropical
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
5,5
Org. C
45,6g/kg
Clay
51,0%
Sand
19,1%
Silt
29,9%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,5
Org. C
54,6g/kg
Clay
50,8%
Sand
18,9%
Silt
30,4%
5–15 cm
pH H₂O
5,5
Org. C
51,5g/kg
Clay
52,3%
Sand
18,5%
Silt
29,3%
15–30 cm
pH H₂O
5,5
Org. C
30,9g/kg
Clay
50,0%
Sand
19,9%
Silt
30,1%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest11.9%
Crops7.4%
Built-up0.7%
Bare soil0.1%
Other (grassland, water…)79.9%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology6 basins · 3 lakes · 2 rivers
Hydrology metrics for this exact territory
Stream length here
16,5km
Lake surface here
45,15km²
Basins crossed
6
Max stream order
6
Max drainage
58 742km²
Discharge in basins
278,8m³/s
Mean precip.
1 210mm/an
Mean T°
27,3°C
Moisture idx
-0,19
Mean runoff
425mm/an
Mean elev. (basins)
20m
Watersheds crossing here
- Bassin de Ouémésub-area1 289,8 km²overlap52.52 km²44%
- Bassin de Nidomeysub-area174,6 km²overlap50.11 km²42%
- Bassin de Canal d'Akôdjisub-area141,1 km²overlap9.30 km²8%
- Bassin de Chenal de Cotonousub-area43,9 km²overlap4.54 km²4%
- Bassin de Ouémésub-area5,3 km²overlap3.36 km²3%
- Basin #64480sub-area131,4 km²overlap0.63 km²1%
Lakes (3, top by area)
Rivers / streams (2, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
0,2nW
Built-up
69,7%
Pesticides
13,9kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN V · 1🌊 Marine · 1📍 Point sites · 1
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN