HydroBASINS lev08 watershed · #2080027210
Bassin de Roja
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 : Talsi
Sub-basin area
540,2km²
Upstream area
540,4km²
Discharge
4,39m³/s
Mean elev.
41m
Administrative coverage
12 intersecting protected areas
Zemgaļu purvs
IUCN IVNature Reserve
4.62 km² overlap
Zemgaļu purvs
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.62 km² overlap
Kaltenes kalvas
IUCN IIINature Monument
1.91 km² overlap
Talsu pauguraine
IUCN IINature Park
1.21 km² overlap
Talsu pauguraine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.21 km² overlap
Jūrenvalka meži
IUCN IVNature Reserve
0.90 km² overlap
Lūrmaņu atsegumi
IUCN IIINature Monument
0.17 km² overlap
Nature Monument
0.08 km² overlap
Rīgas līča rietumu piekraste
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.02 km² overlap
3 more protected areassorted by overlap area
Rīgas līča rietumu piekraste
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.02 km² overlap
Rigas lica rietumu piekraste
IUCN Not ReportedBaltic Sea Protected Area (HELCOM)
0.02 km² overlap
Rīgas līča rietumu piekraste
IUCN IVProtected Marine Area
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
511 distinct species · 1 429 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Roja : 32 espèces reliées par 86 interactions GloBI sur 4 types (connectance 8.7%, filtre Serrano α=0.2). 13 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°
6,2°C
Annual rain
642mm
Moisture idx (CMI)
0,13
Runoff
322mm/an
PET
555mm
AET
435mm
Mean slope
1,0°
Water table
53cm
Forest
54%
Crops
27%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)