HydroBASINS lev08 watershed · #7080601420
Bassin de Merced River
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 : Mariposa, Merced, Tuolumne
Sub-basin area
694,2km²
Upstream area
2 960,5km²
Discharge
39,12m³/s
Mean elev.
402m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de North Fork Merced River320 km²
- Bassin de Merced River238 km²
3 dept-equivalent regions (GADM L2)
- 474.6 km²68.3% of basin
- 217.3 km²31.3% of basin
- 2.6 km²0.4% of basin
4 intersecting protected areas
San Luis Nwr Complex
IUCN VEasement
39.92 km² overlap
Merced River
IUCN IbWilderness Study Area
30.65 km² overlap
Conservation Easement
4.25 km² overlap
Reserve Program
2.60 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 252 distinct species · 71 665 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 Merced River : 27 espèces reliées par 72 interactions GloBI sur 4 types (connectance 12.1%, 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°
15,2°C
Annual rain
609mm
Moisture idx (CMI)
-0,57
Runoff
315mm/an
PET
1 424mm
AET
487mm
Mean slope
8,2°
Water table
389cm
Forest
62%
Crops
7%
Urban
0%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)