HydroBASINS lev08 watershed · #7080475390

Bassin de Grant 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 : Clayton, Dubuque, Grant

Pfafstetter: 74287370

Sub-basin area

1 085,8km²

Upstream area

211 350,6km²

Discharge

1 495,08m³/s

Mean elev.

284m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Mississippi River2131 km²

▲ Receives from 2 basins

Bassin de Turkey River544 km²
Bassin de Mississippi River487 km²

3 dept-equivalent regions (GADM L2)

Grant
Wisconsin · United States
955.4 km²
87.8% of basin
Dubuque
Iowa · United States
83.1 km²
7.6% of basin
Clayton
Iowa · United States
49.2 km²
4.5% of basin

14 intersecting protected areas

Upper Mississippi River Floodplain Wetlands
IUCN IV
Wetland of International Importance (Ramsar Site)
58.31 km² overlap
Upper Mississippi River National
IUCN IV
Wildlife And Fish Refuge
21.58 km² overlap
Upper Mississippi River National Wildlife and Fish
IUCN IV
Refuge
9.97 km² overlap
Upper Mississippi River National Wildlife and Fish Refuge - McGregor District
IUCN IV
Refuge
4.27 km² overlap
Rem-Little Grant River
IUCN Not Assigned
Conservation Easement
0.31 km² overlap
Rem-Martin Branch
IUCN Not Assigned
Conservation Easement
0.23 km² overlap
Rem-Grant River
IUCN Not Assigned
Conservation Easement
0.11 km² overlap
Rem-Borah Creek
IUCN Not Assigned
Conservation Easement
0.09 km² overlap
Rem-Bailie Branch
IUCN Not Assigned
Conservation Easement
0.06 km² overlap

5 more protected areassorted by overlap area

Farm Service Agency Interest Of Wi
IUCN Not Assigned
Conservation Easement
0.05 km² overlap
Rem-Rogers Branch
IUCN Not Assigned
Conservation Easement
0.02 km² overlap
Rem-Little Platte River
IUCN Not Assigned
Conservation Easement
0.02 km² overlap
Kurtz Woods Natural Area 1
IUCN V
Natural Area
0.01 km² overlap
Upper Mississippi River National
IUCN IV
Wildlife And Fish Refuge
0.00 km² overlap

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

Species present

1 603 distinct species · 47 992 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 37 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

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Grant River : 29 espèces reliées par 63 interactions GloBI sur 4 types (connectance 9.5%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.095

Patrimoniales

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°

8,0°C

Annual rain

844mm

Moisture idx (CMI)

-0,11

Runoff

263mm/an

PET

949mm

AET

713mm

Mean slope

3,2°

Water table

198cm

Forest

14%

Crops

53%

Urban

Protected

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