HydroBASINS lev08 watershed · #2080554810
Bassin de Călmățui
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 36 administrative regions : Bertestii De Jos, Bordei Verde, Bradeanu, Buzau, C.a. Rosetti +31
Sub-basin area
1 519,8km²
Upstream area
1 519,9km²
Discharge
11,91m³/s
Mean elev.
50m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
36 dept-equivalent regions (GADM L2)
- 127.7 km²8.4% of basin
- 120.1 km²7.9% of basin
- 109.8 km²7.2% of basin
- 105.6 km²6.9% of basin
- 102.1 km²6.7% of basin
- 86.5 km²5.7% of basin
- 82.9 km²5.4% of basin
- 82.7 km²5.4% of basin
28 moreFull L2 list
- Surdila-greci65.8 km² · 4.3%
- Ulmu65.2 km² · 4.3%
- Tintesti53.3 km² · 3.5%
- Surdila-gaiseanca50.3 km² · 3.3%
- Bradeanu49.2 km² · 3.2%
- C.a. Rosetti46.8 km² · 3.1%
- Largu42.1 km² · 2.8%
- Stancuta41.7 km² · 2.7%
- Dudesti36.6 km² · 2.4%
- Scutelnici34.8 km² · 2.3%
- Gheraseni33.9 km² · 2.2%
- Costesti27.9 km² · 1.8%
- Mircea Voda24.8 km² · 1.6%
- Buzau22.7 km² · 1.5%
- Bordei Verde18.0 km² · 1.2%
- Bertestii De Jos17.6 km² · 1.2%
- Cilibia17.3 km² · 1.1%
- Stalpu11.8 km² · 0.8%
- Galbinasi11.6 km² · 0.8%
- Merei8.1 km² · 0.5%
- Cocora7.5 km² · 0.5%
- Ianca6.5 km² · 0.4%
- Vernesti5.8 km² · 0.4%
- Mihailesti3.1 km² · 0.2%
- Faurei1.9 km² · 0.1%
- Rosiori1.2 km² · 0.1%
- Glodeanu-silistea0.4 km² · 0.0%
- Ciocile0.0 km² · 0.0%
7 intersecting protected areas
Valea Călmățuiului
IUCN Not ReportedSpecial Protection Area (Birds Directive)
208.61 km² overlap
Valea Călmățuiului
IUCN Not ReportedSite of Community Importance (Habitats Directive)
181.25 km² overlap
Balta Tătaru
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.97 km² overlap
Balta Mică a Brăilei
IUCN Not ReportedSpecial Protection Area (Birds Directive)
0.15 km² overlap
Pădurea Brădeanu
IUCN Not AssignedNot Assigned
0.07 km² overlap
Balta Mică a Brăilei
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.02 km² overlap
Natural park
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
672 distinct species · 2 853 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 Călmățui : 31 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 108 interactions GloBI sur 4 types (connectance 12.0%, 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°
10,9°C
Annual rain
506mm
Moisture idx (CMI)
-0,47
Runoff
209mm/an
PET
947mm
AET
435mm
Mean slope
0,1°
Water table
35cm
Forest
0%
Crops
72%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)