HydroBASINS lev08 watershed · #7080048120

Bassin de Chocolate 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 : Brazoria, Fort Bend, Galveston, Harris

Coastal basin 24% lakePfafstetter: 75150090

Sub-basin area

2 549,7km²

Upstream area

2 549,7km²

Discharge

0,6m³/s

Mean elev.

Administrative coverage

4 dept-equivalent regions (GADM L2)

Brazoria
Texas · United States
1604.1 km²
63.0% of basin
Galveston
Texas · United States
798.4 km²
31.4% of basin
Fort Bend
Texas · United States
33.9 km²
1.3% of basin
Harris
Texas · United States
0.0 km²
0.0% of basin

22 intersecting protected areas

Brazoria
IUCN IV
National Wildlife Refuge
190.31 km² overlap
Brazoria National Wildlife Refuge
IUCN IV
Marine Protected Area
185.87 km² overlap
Scenic Galveston Preserves Complex
IUCN V
Preserve
10.91 km² overlap
Texas City Fee
IUCN V
Private Conservation Land
9.71 km² overlap
Christmas Bay
IUCN V
Coastal Preserve
7.43 km² overlap
Galveston Island State Park
IUCN IV
Marine Protected Area
6.38 km² overlap
Galveston Bay Fee
IUCN V
Private Conservation Land
5.02 km² overlap
West Galveston Bay Megasite
IUCN V
Easement
4.02 km² overlap
San Bernard
IUCN IV
National Wildlife Refuge
3.18 km² overlap

13 more protected areassorted by overlap area

Us-Tx-142-8
IUCN Not Assigned
Conservation Easement
2.82 km² overlap
Texas City
IUCN V
Easement
2.61 km² overlap
San Bernard National Wildlife Refuge
IUCN IV
Marine Protected Area
2.41 km² overlap
Christmas Bay Tract
IUCN V
State Conservation Land
1.98 km² overlap
Slop Bowl
IUCN V
Private Conservation Land
1.15 km² overlap
North Deer Island
IUCN V
Audubon Society Preserve or Sanctuary
0.66 km² overlap
West Bay Bird Island
IUCN V
Audubon Society Preserve or Sanctuary
0.47 km² overlap
Little Pelican Island
IUCN V
Audubon Society Preserve or Sanctuary
0.35 km² overlap
McFarlane Marsh
IUCN V
Environmental System
0.27 km² overlap
Open Space
IUCN V
Local Conservation Area
0.13 km² overlap
Galveston Bay Prairie Complex Fee
IUCN V
Private Conservation Land
0.04 km² overlap
Dos Vacas Muertas
IUCN V
Sanctuary
0.02 km² overlap
Quintana Neotropical
IUCN V
Bird Sanctuary
0.01 km² overlap

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

Species present

4 867 distinct species · 1 225 025 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 42 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 Chocolate Bayou : 33 espèces reliées par 70 interactions GloBI sur 3 types (connectance 8.1%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.081

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°

20,5°C

Annual rain

1 226mm

Moisture idx (CMI)

-0,07

Runoff

519mm/an

PET

1 313mm

AET

1 030mm

Mean slope

0,1°

Water table

9cm

Forest

22%

Crops

28%

Urban

12%

Protected

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