HydroBASINS lev08 watershed · #7080661500
Bassin de Fifteen Mile Bayou
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 4 administrative regions : Crittenden, Cross, Lee, Saint Francis
Sub-basin area
1 302,4km²
Upstream area
1 302,5km²
Discharge
29,51m³/s
Mean elev.
61m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- CrittendenArkansas · United States797.0 km²61.2% of basin
- Saint FrancisArkansas · United States412.8 km²31.7% of basin
- LeeArkansas · United States51.9 km²4.0% of basin
- CrossArkansas · United States40.8 km²3.1% of basin
15 intersecting protected areas
Reserve Program
24.10 km² overlap
Us-Ar-30-5
IUCN Not AssignedConservation Easement
8.25 km² overlap
Us-Ar-75-3
IUCN Not AssignedConservation Easement
3.78 km² overlap
Us-Ar-75-37
IUCN Not AssignedConservation Easement
3.59 km² overlap
Us-Ar-30-11
IUCN Not AssignedConservation Easement
2.91 km² overlap
Us-Ar-30-20
IUCN Not AssignedConservation Easement
2.91 km² overlap
US-AR-30-17 Wetlands
IUCN Not AssignedReserve Program
2.26 km² overlap
US-AR-75-3 Wetlands
IUCN Not AssignedReserve Program
1.90 km² overlap
Us-Ar-30-28
IUCN Not AssignedConservation Easement
1.42 km² overlap
6 more protected areassorted by overlap area
Us-Ar-30-12
IUCN Not AssignedConservation Easement
1.37 km² overlap
Reserve Program
0.96 km² overlap
Us-Ar-75-23
IUCN Not AssignedConservation Easement
0.84 km² overlap
Us-Ar-30-13
IUCN Not AssignedConservation Easement
0.58 km² overlap
Us-Ar-75-13
IUCN Not AssignedConservation Easement
0.52 km² overlap
Us-Ar-30-14
IUCN Not AssignedConservation Easement
0.45 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
579 distinct species · 15 659 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Fifteen Mile Bayou : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 73 interactions GloBI sur 4 types (connectance 12.3%, filtre Serrano α=0.2). 5 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°
16,0°C
Annual rain
1 281mm
Moisture idx (CMI)
0,01
Runoff
715mm/an
PET
1 266mm
AET
958mm
Mean slope
0,1°
Water table
4cm
Forest
2%
Crops
80%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)