HydroBASINS lev08 watershed · #6080475220
Bassin de Riacho da Marmelada
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 : Barreiras do Piauí, Gilbués, Monte Alegre do Piauí, São Gonçalo do Gurguéia
Sub-basin area
589,9km²
Upstream area
590km²
Discharge
3,42m³/s
Mean elev.
442m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 310.2 km²52.8% of basin
- 203.8 km²34.7% of basin
- 71.4 km²12.2% of basin
- 2.0 km²0.3% of basin
2 intersecting protected areas
Environmental Protection Area
288.54 km² overlap
Park
18.47 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
155 distinct species · 501 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 da Marmelada : 25 espèces reliées par 39 interactions GloBI sur 3 types (connectance 6.6%, filtre Serrano α=0.2). 10 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°
25,2°C
Annual rain
1 091mm
Moisture idx (CMI)
-0,43
Runoff
188mm/an
PET
1 924mm
AET
922mm
Mean slope
2,2°
Water table
203cm
Forest
4%
Crops
3%
Urban
1%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)