Department · TCD
Djourf Al Ahmar
Chad
Species observed
145
Observations
460
Area
3 856,2km²
Ecological tissue
Sample of 4 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 Djourf Al Ahmar : 4 espèces reliées par 3 interactions GloBI sur 1 type (connectance 50.0%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
145 distinct species · 460 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
27,7°C
Annual rain
516mm
Warmest m°
39,4°C
Coldest m°
16,3°C
Elevation: 539 m on average (min 469 m, max 787 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
7,4g/kg
Clay
27,8%
Sand
44,3%
Silt
27,9%
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)
Hydrology19 basins · 0 lakes · 6 rivers
Hydrology metrics for this exact territory
Stream length here
70,3km
Basins crossed
19
Max stream order
4
Max drainage
11 045km²
Discharge in basins
12,2m³/s
Mean precip.
537mm/an
Mean T°
27,9°C
Moisture idx
-0,76
Mean runoff
25mm/an
Mean elev. (basins)
554m
Watersheds crossing here
- Basin #10690sub-area885,8 km²overlap865.17 km²22%
- Basin #01380sub-area575,9 km²overlap431.51 km²11%
- Basin #99180sub-area494 km²overlap373.41 km²10%
- Basin #04140sub-area315 km²overlap313.76 km²8%
- Basin #05310sub-area623,5 km²overlap267.96 km²7%
- Bassin de Wadi Hamrasub-area441,8 km²overlap253.36 km²7%
- Bassin de Ouadi Ouaoualasub-area236,9 km²overlap233.81 km²6%
- Basin #10830sub-area1 196,6 km²overlap215.68 km²6%
- Bassin de وادي توسةsub-area935,5 km²overlap202.05 km²5%
10 more basinssorted by overlap
- Basin #04270sub-area191,7 km²overlap190.99 km²5%
- Bassin de Olo Ouaoualasub-area719,8 km²overlap186.31 km²5%
- Bassin de نهر البطحةsub-area1 131,6 km²overlap124.38 km²3%
- Bassin de Ouadi Kamerisub-area80,2 km²overlap79.87 km²2%
- Bassin de Ouadi Kamerisub-area319,3 km²overlap62.69 km²2%
- Basin #04000sub-area45,2 km²overlap45.07 km²1%
- Basin #04130sub-area9,2 km²overlap9.16 km²0%
- Basin #03590sub-area126,1 km²overlap0.84 km²0%
- Bassin de Wadi Hamrasub-area158,3 km²overlap0.17 km²0%
- Basin #01090sub-area257,1 km²overlap0.01 km²0%
Rivers / streams (6, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,0nW
Built-up
1,6%
Pesticides
0,1kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)