HydroBASINS lev08 watershed · #2080461100
Bassin de Retzgraben
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 4 administrative regions : Eichstätt, Ingolstadt, Neuburg-Schrobenhausen, Pfaffenhofen an der Ilm
Sub-basin area
238,3km²
Upstream area
20 340,6km²
Discharge
318,2m³/s
Mean elev.
396m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Donau477 km²
- Bassin de Schutter192 km²
4 dept-equivalent regions (GADM L2)
- 126.1 km²52.8% of basin
- 87.1 km²36.5% of basin
- 25.5 km²10.7% of basin
- 0.3 km²0.1% of basin
15 intersecting protected areas
Landscape Protection Area
17.56 km² overlap
Donauauen zwischen Lechmündung und Ingolstadt
IUCN Not ReportedSpecial Protection Area (Birds Directive)
10.04 km² overlap
Donauauen mit Gerolfinger Eichenwald
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
9.29 km² overlap
Landscape Protection Area
7.79 km² overlap
Landscape Protection Area
5.29 km² overlap
Donaumoosbäche, Zucheringer Wörth und Brucker Forst
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.41 km² overlap
Donauauen zwischen Ingolstadt und Weltenburg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
4.34 km² overlap
Landscape Protection Area
3.98 km² overlap
Standortübungsplatz Ingolstadt - Hepberg
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.67 km² overlap
6 more protected areassorted by overlap area
Nature Reserve
1.16 km² overlap
Landscape Protection Area
0.72 km² overlap
Landscape Protection Area
0.67 km² overlap
Alte Donau mit Brenne
IUCN IVNature Reserve
0.60 km² overlap
Landscape Protection Area
0.17 km² overlap
Landscape Protection Area
0.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 331 distinct species · 62 919 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Retzgraben : 27 espèces reliées par 127 interactions GloBI sur 4 types (connectance 19.1%, 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°
8,3°C
Annual rain
745mm
Moisture idx (CMI)
-0,05
Runoff
282mm/an
PET
781mm
AET
612mm
Mean slope
1,1°
Water table
53cm
Forest
11%
Crops
57%
Urban
38%
Protected
16%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)