HydroBASINS lev08 watershed · #1080842910
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 2 administrative regions : Kissidougou, Kérouané
Sub-basin area
1 295,6km²
Upstream area
1 296km²
Discharge
33,29m³/s
Mean elev.
592m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- KissidougouFaranah · Guinea873.2 km²67.7% of basin
- 417.1 km²32.3% of basin
1 intersecting protected areas
Yardo
IUCN Not ReportedClassified Forest
0.44 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
34 distinct species · 73 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 4 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 : 2 espèces reliées par 3 interactions GloBI sur 1 type (connectance 50.0%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
24,6°C
Annual rain
2 148mm
Moisture idx (CMI)
0,02
Runoff
822mm/an
PET
2 113mm
AET
1 400mm
Mean slope
3,9°
Water table
171cm
Forest
11%
Crops
7%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)