HydroBASINS lev08 watershed · #7080550180
Bassin de Big Walnut Creek
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 2 administrative regions : Hendricks, Putnam
Sub-basin area
290km²
Upstream area
549,3km²
Discharge
7,1m³/s
Mean elev.
260m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
2 dept-equivalent regions (GADM L2)
- Putnam259.1 km²89.3% of basin
- 31.2 km²10.7% of basin
11 intersecting protected areas
Big Walnut Addition
IUCN VNature Preserve
3.19 km² overlap
Big Walnut Fee
IUCN VPrivate Conservation Land
3.15 km² overlap
Big Walnut
IUCN Not AssignedConservation Area
2.86 km² overlap
Nature Preserve
1.16 km² overlap
McCloud Nature Park
IUCN VConservation Easement
0.52 km² overlap
Conservation Area
0.42 km² overlap
McCloud Nature Park
IUCN VConservation Easement
0.41 km² overlap
Reserve Program
0.16 km² overlap
Hemlock Ridge
IUCN VNature Preserve
0.15 km² overlap
2 more protected areassorted by overlap area
Big Walnut
IUCN VNatural Area
0.13 km² overlap
Big Walnut
IUCN VConservation Easement
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 703 distinct species · 94 729 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Big Walnut Creek : 27 espèces reliées par 61 interactions GloBI sur 4 types (connectance 9.7%, filtre Serrano α=0.2). 9 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°
10,9°C
Annual rain
1 069mm
Moisture idx (CMI)
-0,01
Runoff
408mm/an
PET
1 085mm
AET
846mm
Mean slope
1,2°
Water table
82cm
Forest
53%
Crops
57%
Urban
2%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)