HydroBASINS lev08 watershed · #6080392260
Bassin de Riacho Seco
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 8 administrative regions : Barra D'Alcântara, Inhuma, Ipiranga do Piauí, Novo Oriente do Piauí, Oeiras +3
Sub-basin area
1 059,7km²
Upstream area
1 059,7km²
Discharge
3,34m³/s
Mean elev.
324m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
8 dept-equivalent regions (GADM L2)
- 564.2 km²53.5% of basin
- 215.5 km²20.4% of basin
- 110.0 km²10.4% of basin
- 104.3 km²9.9% of basin
- 46.5 km²4.4% of basin
- 12.7 km²1.2% of basin
- 1.5 km²0.1% of basin
- 0.4 km²0.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
12 distinct species · 21 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 2 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 Seco : 2 espèces reliées par 1 interaction GloBI sur 1 type (connectance 100.0%, 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°
25,9°C
Annual rain
963mm
Moisture idx (CMI)
-0,48
Runoff
99mm/an
PET
1 838mm
AET
814mm
Mean slope
4,3°
Water table
404cm
Forest
14%
Crops
7%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)