HydroBASINS lev08 watershed · #6080448500
Bassin de Riacho dos Calhaus
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 4 administrative regions : Bom Jesus, Cristino Castro, Currais, Santa Luz
Sub-basin area
1 305,9km²
Upstream area
29 533,7km²
Discharge
87,02m³/s
Mean elev.
388m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Riacho da Tábua1218 km²
- Bassin de Riacho dos Bois899 km²
4 dept-equivalent regions (GADM L2)
- 815.6 km²62.7% of basin
- 200.8 km²15.4% of basin
- 176.5 km²13.6% of basin
- 107.6 km²8.3% of basin
1 intersecting protected areas
Park
238.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
216 distinct species · 457 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Riacho dos Calhaus : 39 espèces reliées par 47 interactions GloBI sur 5 types (connectance 4.7%, filtre Serrano α=0.2). 6 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°
26,2°C
Annual rain
987mm
Moisture idx (CMI)
-0,48
Runoff
161mm/an
PET
1 881mm
AET
834mm
Mean slope
4,6°
Water table
360cm
Forest
66%
Crops
2%
Urban
1%
Protected
18%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)