Ontologia

HydroBASINS lev08 watershed · #7080047980

Bassin de Old 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 : Chambers, Harris, Liberty

Coastal basin 53% lakePfafstetter: 75150010

Sub-basin area

481,7km²

Upstream area

481,7km²

Discharge

0,15m³/s

Mean elev.

16m

Administrative coverage

3 dept-equivalent regions (GADM L2)

2 intersecting protected areas

  • Us-Tx-6-1

    IUCN Not Assigned

    Conservation Easement

    7.39 km² overlap

  • Trinity River

    IUCN IV

    National Wildlife Refuge

    1.95 km² overlap

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

Species present

1 097 distinct species · 88 580 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

88 580 obs · 9 cellules
Obs. / cellule
≥ 50 326
50 326–50 325
7 103–50 325
1 773–7 102
< 1 773

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 38 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

Indicateurs du tissu écologique

Tissu écologique de Bassin de Old River : 29 espèces reliées par 75 interactions GloBI sur 3 types (connectance 10.7%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
75
Connectance
0.107
Patrimoniales
0
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°

20,2°C

Annual rain

1 310mm

Moisture idx (CMI)

-0,06

Runoff

556mm/an

PET

1 390mm

AET

1 087mm

Mean slope

0,2°

Water table

19cm

Forest

47%

Crops

22%

Urban

0%

Protected

0%

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