HydroBASINS lev08 watershed · #1080823180
Bassin de Niandan
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 3 administrative regions : Kankan, Kissidougou, Kouroussa
Sub-basin area
1 313,2km²
Upstream area
4 802,8km²
Discharge
105,59m³/s
Mean elev.
489m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Niandan2194 km²
- Bassin de Niandan1296 km²
3 dept-equivalent regions (GADM L2)
- KissidougouFaranah · Guinea665.2 km²50.9% of basin
- 341.2 km²26.1% of basin
- 301.3 km²23.0% of basin
1 intersecting protected areas
Yardo
IUCN Not ReportedClassified Forest
54.92 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
224 distinct species · 461 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 3 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 Bassin de Niandan : 3 espèces reliées par 2 interactions GloBI sur 1 type (connectance 66.7%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
25,5°C
Annual rain
1 850mm
Moisture idx (CMI)
-0,15
Runoff
600mm/an
PET
2 179mm
AET
1 301mm
Mean slope
2,5°
Water table
110cm
Forest
37%
Crops
7%
Urban
0%
Protected
56%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)