Ontologia

HydroBASINS lev08 watershed · #7080553290

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 3 administrative regions : Clay, Parke, Putnam

Pfafstetter: 74266445

Sub-basin area

118,7km²

Upstream area

833,6km²

Discharge

10,85m³/s

Mean elev.

222m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Eel River434 km²

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

1 intersecting protected areas

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

889 distinct species · 6 784 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 784 obs · 4 cellules
Obs. / cellule
≥ 4 364
4 364–4 363
1 653–4 363
1 653–1 652
< 1 653

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 41 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Big Walnut Creek : 32 espèces reliées par 75 interactions GloBI sur 4 types (connectance 8.7%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
42
Interactions affichées
75
Connectance
0.087
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

11,2°C

Annual rain

1 078mm

Moisture idx (CMI)

-0,02

Runoff

411mm/an

PET

1 099mm

AET

855mm

Mean slope

1,8°

Water table

123cm

Forest

91%

Crops

32%

Urban

0%

Protected

1%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)