HydroBASINS lev08 watershed · #7080536440
Bassin de Tarkio 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 8 administrative regions : Atchison, Cass, Fremont, Holt, Montgomery +3
Sub-basin area
1 324,1km²
Upstream area
1 324,1km²
Discharge
9,42m³/s
Mean elev.
330m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
8 dept-equivalent regions (GADM L2)
- PageIowa · United States565.7 km²42.7% of basin
- Atchison461.6 km²34.8% of basin
- MontgomeryIowa · United States227.7 km²17.2% of basin
- 39.9 km²3.0% of basin
- 15.5 km²1.2% of basin
- FremontIowa · United States9.0 km²0.7% of basin
- CassIowa · United States6.3 km²0.5% of basin
- 0.0 km²0.0% of basin
5 intersecting protected areas
Tarkio Prairie
IUCN VConservation Area
2.34 km² overlap
Thurnau (H. F.)
IUCN VConservation Area
0.22 km² overlap
Tarkio Prairie
IUCN VNatural Area
0.22 km² overlap
Palmquist Prairie
IUCN VPrivate Conservation
0.02 km² overlap
Franek Prairie
IUCN VLocal Conservation Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
608 distinct species · 3 285 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Tarkio River : 23 espèces reliées par 128 interactions GloBI sur 4 types (connectance 19.2%, filtre Serrano α=0.2). 14 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°
10,3°C
Annual rain
867mm
Moisture idx (CMI)
-0,20
Runoff
226mm/an
PET
1 089mm
AET
735mm
Mean slope
1,8°
Water table
161cm
Forest
1%
Crops
83%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)