HydroBASINS lev08 watershed · #6080290410
Bassin de Riacho Contendas
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 5 administrative regions : Alcântaras, Massapê, Meruoca, Santana do Acaraú, Senador Sá
Sub-basin area
478,8km²
Upstream area
478,9km²
Discharge
5,14m³/s
Mean elev.
259m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 395.7 km²83.0% of basin
- 78.7 km²16.5% of basin
- 1.1 km²0.2% of basin
- 1.1 km²0.2% of basin
- 0.2 km²0.0% of basin
1 intersecting protected areas
Environmental Protection Area
99.43 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
474 distinct species · 9 072 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Contendas : 21 espèces reliées par 33 interactions GloBI sur 3 types (connectance 8.1%, filtre Serrano α=0.2). 8 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
1 157mm
Moisture idx (CMI)
-0,37
Runoff
335mm/an
PET
1 854mm
AET
865mm
Mean slope
6,4°
Water table
258cm
Forest
89%
Crops
18%
Urban
2%
Protected
21%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)