HydroBASINS lev08 watershed · #7080757780
Bassin de East Fork San Jacinto 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 5 administrative regions : Harris, Liberty, Montgomery, San Jacinto, Walker
Sub-basin area
2 479,3km²
Upstream area
2 479,4km²
Discharge
29,58m³/s
Mean elev.
73m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 810.0 km²32.7% of basin
- Montgomery775.7 km²31.3% of basin
- Liberty436.3 km²17.6% of basin
- Walker333.1 km²13.4% of basin
- Harris121.7 km²4.9% of basin
7 intersecting protected areas
Damuth
IUCN VSanctuary
2.50 km² overlap
Sam Houston National
IUCN VNational Forest
2.34 km² overlap
Winters Bayou
IUCN VSanctuary
0.53 km² overlap
Winters Bayou
IUCN VPreserve
0.32 km² overlap
Farnsworth
IUCN VPark
0.12 km² overlap
Old Magnolia
IUCN VAudubon Society Preserve or Sanctuary
0.01 km² overlap
Garwood Property
IUCN VEnvironmental System
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 686 distinct species · 164 697 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 East Fork San Jacinto River : 34 espèces reliées par 90 interactions GloBI sur 4 types (connectance 8.7%, filtre Serrano α=0.2). 12 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°
19,4°C
Annual rain
1 234mm
Moisture idx (CMI)
-0,16
Runoff
372mm/an
PET
1 463mm
AET
1 041mm
Mean slope
0,9°
Water table
54cm
Forest
95%
Crops
9%
Urban
4%
Protected
12%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)