HydroBASINS lev08 watershed · #2080576660
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 50 administrative regions across 2 countries : Belene, Bogdana, Calmatuiu, Calmatuiu De Sus, Ciuperceni +44
Sub-basin area
2 682,4km²
Upstream area
634 983,8km²
Discharge
5 777,58m³/s
Mean elev.
91m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sâi207 km²
- Bassin de Осъм157 km²
50 dept-equivalent regions (GADM L2)
- 337.6 km²12.6% of basin
- 280.4 km²10.4% of basin
- 134.3 km²5.0% of basin
- 102.6 km²3.8% of basin
- 102.5 km²3.8% of basin
- 100.4 km²3.7% of basin
- 98.4 km²3.7% of basin
- 87.3 km²3.2% of basin
42 moreFull L2 list
- Crangu82.0 km² · 3.1%
- Troianul81.5 km² · 3.0%
- Putineiu77.4 km² · 2.9%
- Calmatuiu75.6 km² · 2.8%
- Nasturelu75.5 km² · 2.8%
- Lisa71.9 km² · 2.7%
- Calmatuiu De Sus71.8 km² · 2.7%
- Crangeni67.2 km² · 2.5%
- Turnu Magurele62.5 km² · 2.3%
- Salcia61.1 km² · 2.3%
- Bogdana60.3 km² · 2.2%
- Traian57.3 km² · 2.1%
- Mihaesti53.9 km² · 2.0%
- Furculesti45.5 km² · 1.7%
- Slobozia Mandra44.2 km² · 1.6%
- Plopii-slavitesti39.4 km² · 1.5%
- Maldaeni38.5 km² · 1.4%
- Segarcea-vale38.3 km² · 1.4%
- Draganesti-olt36.0 km² · 1.3%
- Ciuperceni32.0 km² · 1.2%
- Seaca31.8 km² · 1.2%
- Lunca29.3 km² · 1.1%
- Lita24.7 km² · 0.9%
- Piatra24.1 km² · 0.9%
- Izvoarele21.0 km² · 0.8%
- Viisoara19.4 km² · 0.7%
- Zimnicea18.9 km² · 0.7%
- Sprancenata17.5 km² · 0.7%
- Valcele17.4 km² · 0.6%
- Daneasa16.9 km² · 0.6%
- Rosiori De Vede16.0 km² · 0.6%
- Valeni15.1 km² · 0.6%
- Tsenovo9.8 km² · 0.4%
- Nicolae Titulescu2.7 km² · 0.1%
- Pietrosani2.0 km² · 0.1%
- Maruntei1.9 km² · 0.1%
- Peretu1.5 km² · 0.1%
- Schitu1.5 km² · 0.1%
- Crampoia0.6 km² · 0.0%
- Pavlikeni0.1 km² · 0.0%
- Stejaru0.1 km² · 0.0%
- Serbanesti0.0 km² · 0.0%
30 intersecting protected areas
Persina
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
249.70 km² overlap
Persina
IUCN VNature Park
217.23 km² overlap
Belene Islands Complex
IUCN IaWetland of International Importance (Ramsar Site)
183.33 km² overlap
Nikopolsko plato
IUCN Not ReportedSpecial Protection Area (Birds Directive)
139.70 km² overlap
Nikopolsko plato
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
101.51 km² overlap
Kompleks Belenski ostrovi
IUCN Not ReportedSpecial Protection Area (Birds Directive)
70.10 km² overlap
Svishtovsko-Belenska nizina
IUCN Not ReportedSpecial Protection Area (Birds Directive)
54.40 km² overlap
Suhaia
IUCN Not ReportedSpecial Protection Area (Birds Directive)
45.15 km² overlap
Svishtovska gora
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
19.18 km² overlap
21 more protected areassorted by overlap area
Ostrov Lakat
IUCN Not ReportedSpecial Protection Area (Birds Directive)
12.61 km² overlap
Gura Vedei - Șaica - Slobozia
IUCN Not ReportedSite of Community Importance (Habitats Directive)
12.01 km² overlap
Ostrov Vardim
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.68 km² overlap
Ostrov Vardim
IUCN Not ReportedSpecial Protection Area (Birds Directive)
11.68 km² overlap
Persin
IUCN VIProtected Site
8.31 km² overlap
Corabia - Turnu Măgurele
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.80 km² overlap
Pădurea Călugărească
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.62 km² overlap
Pădurea Dorobanțul
IUCN Not ReportedSite of Community Importance (Habitats Directive)
6.47 km² overlap
Vedea - Dunăre
IUCN Not ReportedSpecial Protection Area (Birds Directive)
6.22 km² overlap
Persin-Iztok
IUCN VIProtected Site
6.03 km² overlap
Persinski blata
IUCN IVManaged Reserve
4.03 km² overlap
Reka Yantra
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.58 km² overlap
Kaykusha
IUCN VIProtected Site
1.54 km² overlap
Seaca
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.07 km² overlap
Stariat Dab
IUCN VIProtected Site
0.98 km² overlap
Pădurea Troianu
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.79 km² overlap
Pădurea Troianu
IUCN IVNature reserve
0.72 km² overlap
Rezervația de bujori a Academiei
IUCN Not AssignedNot Assigned
0.56 km² overlap
Ostrovul Gâsca
IUCN IVNature reserve
0.52 km² overlap
Pădurea Călugărească
IUCN IVNature reserve
0.42 km² overlap
Milka
IUCN IaStrict Nature Reserve
0.39 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
917 distinct species · 18 790 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 81 interactions GloBI sur 3 types (connectance 12.9%, filtre Serrano α=0.2). 10 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°
11,2°C
Annual rain
579mm
Moisture idx (CMI)
-0,42
Runoff
109mm/an
PET
1 006mm
AET
494mm
Mean slope
1,4°
Water table
194cm
Forest
3%
Crops
72%
Urban
1%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)