HydroBASINS lev08 watershed · #4080842350
Bassin de Karwan Nadi
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 6 administrative regions : Aligarh, Bulandshahr, Gautam Buddha Nagar, Ghaziabad, Hapur +1
Sub-basin area
1 779,5km²
Upstream area
1 780km²
Discharge
4,91m³/s
Mean elev.
197m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- Bulandshahr703.2 km²39.6% of basin
- Aligarh697.3 km²39.2% of basin
- 195.9 km²11.0% of basin
- Hapur141.8 km²8.0% of basin
- Hathras36.1 km²2.0% of basin
- Ghaziabad2.5 km²0.1% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
388 distinct species · 17 860 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Karwan Nadi : 23 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 39 interactions GloBI sur 3 types (connectance 7.9%, 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°
25,2°C
Annual rain
793mm
Moisture idx (CMI)
-0,53
Runoff
88mm/an
PET
1 703mm
AET
670mm
Mean slope
0,0°
Water table
7cm
Forest
0%
Crops
81%
Urban
17%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)