HydroBASINS lev08 watershed · #7080501340
Bassin de Fourmile 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 : Boone, Polk, Story
Sub-basin area
251,2km²
Upstream area
251,2km²
Discharge
1,74m³/s
Mean elev.
286m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- PolkIowa · United States236.5 km²94.0% of basin
- StoryIowa · United States14.4 km²5.7% of basin
- BooneIowa · United States0.6 km²0.3% of basin
5 intersecting protected areas
Four Mile Creek
IUCN VGreenbelt
0.38 km² overlap
Strasser Woods
IUCN VState Preserve
0.16 km² overlap
Carney Marsh
IUCN VLocal Conservation Area
0.13 km² overlap
Watershed Protection
0.02 km² overlap
Polk County
IUCN VIWaterfowl Production Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
950 distinct species · 29 151 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Fourmile Creek : 26 espèces reliées par 61 interactions GloBI sur 4 types (connectance 11.6%, filtre Serrano α=0.2). 7 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°
9,1°C
Annual rain
843mm
Moisture idx (CMI)
-0,17
Runoff
220mm/an
PET
1 011mm
AET
716mm
Mean slope
0,9°
Water table
98cm
Forest
0%
Crops
62%
Urban
24%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)