HydroBASINS lev08 watershed · #6080411140
Bassin de Riacho Simões
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 15 administrative regions : Alegrete do Piauí, Araripina, Belém do Piauí, Caldeirão Grande do Piauí, Caridade do Piauí +10
Sub-basin area
2 813,8km²
Upstream area
2 814,1km²
Discharge
3,24m³/s
Mean elev.
435m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
15 dept-equivalent regions (GADM L2)
- 500.3 km²17.9% of basin
- 499.8 km²17.8% of basin
- 424.6 km²15.2% of basin
- 374.0 km²13.3% of basin
- 278.7 km²9.9% of basin
- 209.8 km²7.5% of basin
- 177.8 km²6.3% of basin
- 126.8 km²4.5% of basin
7 moreFull L2 list
- Caridade do Piauí114.7 km² · 4.1%
- Alegrete do Piauí47.9 km² · 1.7%
- Vila Nova do Piauí19.8 km² · 0.7%
- Araripina11.9 km² · 0.4%
- Patos do Piauí11.2 km² · 0.4%
- Fronteiras4.4 km² · 0.2%
- Salitre0.2 km² · 0.0%
1 intersecting protected areas
Environmental Protection Area
705.32 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
227 distinct species · 768 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Simões : 23 espèces reliées par 60 interactions GloBI sur 5 types (connectance 8.1%, filtre Serrano α=0.2). 16 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°
25,4°C
Annual rain
653mm
Moisture idx (CMI)
-0,63
Runoff
39mm/an
PET
1 770mm
AET
551mm
Mean slope
2,5°
Water table
449cm
Forest
47%
Crops
13%
Urban
0%
Protected
26%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)