HydroBASINS lev08 watershed · #6080301020
Bassin de Rio Mearim
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 3 administrative regions : Bacabal, Lago Verde, São Mateus do Maranhão
Sub-basin area
251km²
Upstream area
30 027,5km²
Discharge
211,16m³/s
Mean elev.
19m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #6080304910632 km²
- Bassin de Rio Mearim188 km²
3 dept-equivalent regions (GADM L2)
- 130.4 km²52.2% of basin
- 111.2 km²44.5% of basin
- 8.3 km²3.3% of basin
2 intersecting protected areas
Environmental Protection Area
152.18 km² overlap
Wetland of International Importance (Ramsar Site)
151.79 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
91 distinct species · 246 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 8 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 Rio Mearim : 7 espèces reliées par 5 interactions GloBI sur 2 types (connectance 17.9%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
27,4°C
Annual rain
1 637mm
Moisture idx (CMI)
-0,07
Runoff
595mm/an
PET
1 764mm
AET
1 092mm
Mean slope
0,3°
Water table
10cm
Forest
22%
Crops
12%
Urban
1%
Protected
61%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)