Ontologia

Commune · VNM

Sông Hiến

Vietnam

CwaTemperate, dry winter, hot summer(100 %)

Species observed

2

Observations

3

Area

8,7km²

Partial data for this territory

Few observations recorded here. Real biodiversity is likely richer.

Ecological tissue

Not enough documented interactions to build a meaningful graph for this territory.

Species present

2 distinct species · 3 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

3 obs · 1 cellules
Obs. / cellule
≥ 3
3–2
3–2
3–2
< 3

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Climate

Mean T°

22,1°C

Annual rain

1 534mm

Warmest m°

30,3°C

Coldest m°

10,0°C

Elevation: 240 m on average (min 202 m, max 327 m)

Bioclimatic detailsExpert
Annual mean temp.
22,1°C
Annual rain
1 534mm
Warmest month
30,3°C
Coldest month
10,0°C
Mean alt.
240m
Min
202m
Max
327m
Std. dev.
36m
Köppen-Geiger (dominant)
CwaTemperate, dry winter, hot summer(100 %)Temperate

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

5,8

Org. C

20,0g/kg

Clay

35,3%

Sand

24,0%

Silt

40,8%

Average over 0-30 cm. Per-depth details in expert panel.

Dominant lithology: scGLiMaggregated to Cao Bằng

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,8
Org. C
28,1g/kg
Clay
34,7%
Sand
24,5%
Silt
40,8%
5–15 cm
pH H₂O
5,8
Org. C
19,6g/kg
Clay
34,9%
Sand
24,7%
Silt
40,4%
15–30 cm
pH H₂O
5,8
Org. C
12,3g/kg
Clay
36,2%
Sand
22,7%
Silt
41,1%

SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)

Land cover

Forest48.6%
Crops14.3%
Built-up2.9%
Bare soil1.7%
Other (grassland, water…)32.5%

Copernicus Global Land Cover 100m (Buchhorn et al. 2020)

Hydrology2 basins · 0 lakes · 1 rivers

Hydrology metrics for this exact territory

Stream length here

0,5km

Basins crossed

2

Max stream order

5

Max drainage

1 954km²

Discharge in basins

1,5m³/s

Mean precip.

1 484mm/an

Mean T°

21,9°C

Moisture idx

0,09

Mean runoff

628mm/an

Mean elev. (basins)

369m

Watersheds crossing here

Rivers / streams (1, ord ≥ 4)

Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10

Human pressure

Pop. density

10hab/km²

Night light

4,6nW

Built-up

292,8%

Pesticides

9,2kg/km²

GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)