District · IND
Thiruvallur
India
Species observed
1 151
Observations
99 728
Area
3 306,9km²
Ecological tissue
Sample of 27 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 Thiruvallur : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 43 interactions GloBI sur 4 types (connectance 10.6%, 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).
Species present
1 151 distinct species · 99 728 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
28,0°C
Annual rain
1 234mm
Warmest m°
37,0°C
Coldest m°
19,6°C
Elevation: 55 m on average (min -10 m, max 405 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
7,0
Org. C
24,6g/kg
Clay
34,3%
Sand
36,0%
Silt
29,7%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology17 basins · 33 lakes · 19 rivers
Hydrology metrics for this exact territory
Stream length here
417,8km
Lake surface here
26,17km²
Basins crossed
17
Max stream order
5
Max drainage
16 662km²
Discharge in basins
82,7m³/s
Mean precip.
1 079mm/an
Mean T°
28,5°C
Moisture idx
-0,38
Mean runoff
366mm/an
Mean elev. (basins)
71m
Watersheds crossing here
- Bassin de Kosasthalaiyar Riversub-area661,8 km²overlap650.40 km²20%
- Bassin de Aranisub-area1 331,9 km²overlap434.23 km²13%
- Bassin de கூவம் ஆறுsub-area2 216,3 km²overlap330.57 km²10%
- Bassin de Kortalaiyarsub-area1 217,9 km²overlap317.84 km²10%
- Bassin de Nandi Riversub-area444,4 km²overlap302.41 km²9%
- Bassin de Red Hills Reservoir Overflowsub-area316,3 km²overlap274.02 km²8%
- Bassin de Telugu Gangasub-area382,1 km²overlap257.38 km²8%
- Basin #28380sub-area241,6 km²overlap225.38 km²7%
- Bassin de Buckingham Canalsub-area214,5 km²overlap201.42 km²6%
8 more basinssorted by overlap
- Bassin de Nagari Riversub-area455,1 km²overlap156.89 km²5%
- Bassin de Nagari Riversub-area120,6 km²overlap81.71 km²2%
- Bassin de Buckingham Kaaluvasub-area371,3 km²overlap21.28 km²1%
- Basin #28340sub-area168,5 km²overlap14.90 km²0%
- Bassin de Palarsub-area885,8 km²overlap13.41 km²0%
- Basin #30260sub-area202,8 km²overlap12.13 km²0%
- Bassin de Ponnai Riversub-area2 428,8 km²overlap8.73 km²0%
- Bassin de Buckingham Canalsub-area5 km²overlap4.15 km²0%
Lakes (33, top by area)
- Pulal Tankarea13,3 km²avg depth2.1 m
- Cholavaram Tankarea1,8 km²avg depth1.3 m
- Kūvam Tankarea1,2 km²avg depth0.5 m
- Lake #79253area1,1 km²avg depth1.1 m
- Sen Eriarea1,1 km²avg depth1.3 m
- Lac 1399211area1 km²avg depth2.7 m
- Lac 1398909area1 km²avg depth1.6 m
- Lac 1399223area0,8 km²avg depth2.3 m
- Lac 1399092area0,6 km²avg depth2.6 m
24 more lakes
- Lac 1398962area0,5 km²avg depth1.4 m
- Lac 1399161area0,5 km²avg depth3.4 m
- Lac 1399264area0,5 km²avg depth1.9 m
- Lac 1398798area0,4 km²avg depth1.9 m
- Lac 1398550area0,4 km²avg depth1.4 m
- Lac 1399275area0,4 km²avg depth1.8 m
- Lac 1398672area0,4 km²avg depth1.8 m
- Lac 1399314area0,3 km²avg depth1.9 m
- Lac 1399305area0,3 km²avg depth1.6 m
- Lac 1399146area0,3 km²avg depth1.2 m
- Lac 1399295area0,2 km²avg depth1.3 m
- Lac 1399210area0,2 km²avg depth1.7 m
- Lac 1398889area0,2 km²avg depth1.2 m
- Lac 1399216area0,2 km²avg depth1.9 m
- Lac 1399234area0,2 km²avg depth2.7 m
- Lac 1399126area0,2 km²avg depth1.8 m
- Lac 1398997area0,2 km²avg depth1.7 m
- Lac 1399391area0,2 km²avg depth1.7 m
- Lac 1398814area0,2 km²avg depth1.4 m
- Lac 1398784area0,1 km²avg depth1.2 m
- Lac 1399444area0,1 km²avg depth1.6 m
- Lac 1399256area0,1 km²avg depth1.5 m
- Lac 1399263area0,1 km²avg depth1.4 m
- Lac 1398839area0,1 km²avg depth1.5 m
Rivers / streams (19, ord ≥ 4)
- Kosasthalaiyar Riverord 5len here71.86 km100%total72 km
- Araniord 4len here68.41 km44%total157 km
- Nandi Riverord 4len here46.83 km72%total65 km
- கூவம் ஆறுord 3len here46.45 km64%total72 km
- Krishna Canalord 5len here34.67 km100%total35 km
- Telugu Gangaord 1len here23.88 km100%total24 km
- Red Hills Reservoir Overfloword 2len here23.56 km100%total24 km
- Nagari Riverord 4len here18.70 km19%total101 km
- Kortalaiyarord 4len here15.66 km20%total79 km
- Kortallaiyar Riverord 5len here13.48 km100%total14 km
- Buckingham Canalord 3len here12.93 km100%total13 km
- Telugu Gangaord 1len here10.87 km100%total11 km
7 more river segmentssorted by Strahler order + length
- Buckingham Canalord 5len here9.55 km89%total11 km
- Telugu Gangaord 1len here6.85 km26%total26 km
- Kortallaiyar Riverord 1len here4.43 km84%total5 km
- Krishna Canalord 3len here3.41 km17%total20 km
- Surplus water drainord 1len here2.74 km62%total4 km
- Buckingham Canalord 1len here2.17 km73%total3 km
- Link Canalord 1len here1.32 km64%total2 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
10hab/km²
Night light
4,7nW
Built-up
311,0%
Pesticides
3,8kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)