HydroBASINS lev08 watershed · #2080256660
Bassin de Ahja jõgi
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 20 administrative regions : Ahja, Haaslava, Kambja, Kanepi, Kõlleste +15
Sub-basin area
1 055,4km²
Upstream area
1 055,4km²
Discharge
7,8m³/s
Mean elev.
78m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
20 dept-equivalent regions (GADM L2)
- 225.5 km²21.3% of basin
- MoostePõlva · Estonia170.3 km²16.1% of basin
- 107.2 km²10.1% of basin
- KanepiPõlva · Estonia96.1 km²9.1% of basin
- Vastse-KuustePõlva · Estonia95.0 km²9.0% of basin
- VõnnuTartu · Estonia90.0 km²8.5% of basin
- 62.3 km²5.9% of basin
- ValgjärvePõlva · Estonia62.0 km²5.8% of basin
12 moreFull L2 list
- Ahja57.9 km² · 5.5%
- Mäksa24.7 km² · 2.3%
- Räpina16.7 km² · 1.6%
- Meeksi16.2 km² · 1.5%
- Vara10.3 km² · 1.0%
- Veriora7.6 km² · 0.7%
- Sõmerpalu7.3 km² · 0.7%
- Põlva Vald5.5 km² · 0.5%
- Peipsi2.7 km² · 0.3%
- Võru2.3 km² · 0.2%
- Kambja1.1 km² · 0.1%
- Haaslava0.3 km² · 0.0%
30 intersecting protected areas
Peipsiveere
IUCN Not ReportedSpecial Protection Area (Birds Directive)
59.01 km² overlap
Peipsiveere
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
59.01 km² overlap
Peipsiveere
IUCN IaWetland of International Importance (Ramsar Site)
59.01 km² overlap
Peipsiveere looduskaitseala
IUCN Not AssignedNature reserve
59.01 km² overlap
Managed conservation zone of nature reserve
42.35 km² overlap
Meelva looduskaitseala
IUCN Not AssignedNature reserve
14.04 km² overlap
Meelva
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
14.04 km² overlap
Meelva
IUCN Not ReportedSpecial Protection Area (Birds Directive)
14.04 km² overlap
Meelva LKA, Meelva skv.
IUCN IVManaged conservation zone of nature reserve
13.00 km² overlap
21 more protected areassorted by overlap area
Ahja
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11.43 km² overlap
Ahja jõe ürgoru maastikukaitseala
IUCN Not AssignedProtected landscape (nature park)
11.15 km² overlap
Managed conservation zone of nature reserve
8.14 km² overlap
Limited management zone of protected landscape
6.13 km² overlap
Kuulmajärve
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.20 km² overlap
Kuulmajärve looduskaitseala
IUCN Not AssignedNature reserve
4.18 km² overlap
Ihamaru-Tilleoru
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.16 km² overlap
Wilderness conservation zone of protected landscape
3.89 km² overlap
Valgesoo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.43 km² overlap
Valgesoo looduskaitseala
IUCN Not AssignedNature reserve
3.43 km² overlap
Managed conservation zone of nature reserve
3.43 km² overlap
Managed conservation zone of nature reserve
3.33 km² overlap
Limited management zone of nature reserve
2.70 km² overlap
Ihamaru looduskaitseala
IUCN Not AssignedNature reserve
2.55 km² overlap
Limited management zone of nature reserve
2.38 km² overlap
Limited management zone of nature reserve
2.32 km² overlap
Ihamaru LKA, Ihamaru skv.
IUCN IVManaged conservation zone of nature reserve
2.19 km² overlap
Akste looduskaitseala
IUCN Not AssignedNature reserve
1.89 km² overlap
Akste LKA, Akste skv.
IUCN IVManaged conservation zone of nature reserve
1.89 km² overlap
Tilleoru maastikukaitseala
IUCN Not AssignedProtected landscape (nature park)
1.46 km² overlap
Ahja jõgi
IUCN Not AssignedSpawning area
1.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 780 distinct species · 131 691 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Ahja jõgi : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 40 interactions GloBI sur 6 types (connectance 7.6%, filtre Serrano α=0.2). 9 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°
4,9°C
Annual rain
611mm
Moisture idx (CMI)
0,04
Runoff
242mm/an
PET
584mm
AET
449mm
Mean slope
1,2°
Water table
71cm
Forest
29%
Crops
34%
Urban
0%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)