HydroBASINS lev08 watershed · #8080000900

Bassin de Simpson 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 1 administrative regions : Valdez-Cordova

Coastal basin 3% lakePfafstetter: 81130117

Sub-basin area

1 149,4km²

Upstream area

1 149,4km²

Discharge

8,64m³/s

Mean elev.

253m

Administrative coverage

1 dept-equivalent regions (GADM L2)

Valdez-Cordova
Alaska · United States
1040.9 km²
90.0% of basin

8 intersecting protected areas

Evos
IUCN V
Conservation Easement
30.68 km² overlap
Tatitlek Timber
IUCN V
Conservation Easement
29.44 km² overlap
Eyak Corp
IUCN V
Conservation Easement
11.63 km² overlap
Copper River Delta
IUCN V
Critical Habitat Area
3.84 km² overlap
Boswell Bay Beaches
IUCN V
State Marine Park
3.22 km² overlap
Canoe Passage
IUCN V
State Marine Park
2.91 km² overlap
Alaska Maritime
IUCN IV
National Wildlife Refuge
0.01 km² overlap
Alaska Maritime National Wildlife Refuge
IUCN IV
Marine Protected Area
0.01 km² overlap

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

Species present

472 distinct species · 2 340 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Simpson Creek : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 74 interactions GloBI sur 3 types (connectance 13.2%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.132

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°

2,5°C

Annual rain

1 583mm

Moisture idx (CMI)

0,71

Runoff

2 737mm/an

PET

452mm

AET

444mm

Mean slope

15,6°

Water table

450cm

Forest

24%

Crops

Urban

Protected

80%

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