Reserve aquatique du Grand Sud du Gabon
IUCN Not ReportedAquatic reserve · 2017
27 520 km²
Province · gab
Nyanga
Gabon
AwTropical, savannah(100 %)
Species observed
2 902
Observations
32 062
Area
21 815,7km²
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Species present
2 902 distinct species · 32 062 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
24,2°C
Annual rain
1 765mm
Warmest m°
29,4°C
Coldest m°
18,6°C
Elevation: 198 m on average (min -110 m, max 840 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
24,2°C
Annual rain
1 765mm
Warmest month
29,4°C
Coldest month
18,6°C
Mean alt.
198m
Min
-110m
Max
840m
Std. dev.
134m
Köppen-Geiger (dominant)
AwTropical, savannah(100 %)Tropical
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
5,1
Org. C
31,2g/kg
Clay
34,0%
Sand
44,1%
Silt
21,9%
Average over 0-30 cm. Per-depth details in expert panel.
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,0
Org. C
42,1g/kg
Clay
33,2%
Sand
44,9%
Silt
21,9%
5–15 cm
pH H₂O
5,1
Org. C
30,4g/kg
Clay
33,7%
Sand
44,3%
Silt
22,0%
15–30 cm
pH H₂O
5,1
Org. C
20,9g/kg
Clay
35,1%
Sand
43,1%
Silt
21,8%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest74.2%
Crops1.4%
Built-up0.0%
Bare soil0.0%
Other (grassland, water…)24.4%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology40 basins · 7 lakes · 38 rivers
Hydrology metrics for this exact territory
Stream length here
2 263,6km
Lake surface here
164,13km²
Basins crossed
40
Max stream order
6
Max drainage
25 075km²
Discharge in basins
3 837,6m³/s
Mean precip.
1 608mm/an
Mean T°
24,8°C
Moisture idx
0,00
Mean runoff
838mm/an
Mean elev. (basins)
209m
Watersheds crossing here
- Bassin de Bigongosub-area3 520,2 km²overlap3133.16 km²14%
- Bassin de Loutsibisub-area2 535,3 km²overlap2492.82 km²11%
- Bassin de Nyangasub-area2 116,9 km²overlap1523.86 km²7%
- Bassin de Maambisub-area1 334,4 km²overlap1312.59 km²6%
- Bassin de Nyangasub-area1 203,7 km²overlap1198.40 km²5%
- Bassin de Doulisub-area1 236,3 km²overlap1044.27 km²5%
- Bassin de Dounvousub-area980,5 km²overlap964.47 km²4%
- Bassin de Diboundousub-area1 108,1 km²overlap954.85 km²4%
- Bassin de Douguégnisub-area849,9 km²overlap846.12 km²4%
31 more basinssorted by overlap
- Bassin de Dousséoussousub-area631,1 km²overlap628.34 km²3%
- Bassin de Nyangasub-area620,9 km²overlap618.13 km²3%
- Bassin de Gniakisisub-area589,6 km²overlap584.92 km²3%
- Bassin de Nyangasub-area571,7 km²overlap569.18 km²3%
- Bassin de Moukalabasub-area522,3 km²overlap520.00 km²2%
- Bassin de Mouvingasub-area520,2 km²overlap517.93 km²2%
- Bassin de Dolasub-area2 080,3 km²overlap499.27 km²2%
- Bassin de Mounfoutisub-area408 km²overlap406.24 km²2%
- Bassin de Nyangasub-area356,8 km²overlap355.22 km²2%
- Bassin de Nyangasub-area334,1 km²overlap332.65 km²2%
- Bassin de Mbanisub-area321,2 km²overlap319.79 km²1%
- Bassin de Ngongosub-area1 423,6 km²overlap319.78 km²1%
- Bassin de Moukalabasub-area720,7 km²overlap312.67 km²1%
- Bassin de Doukisub-area313 km²overlap311.65 km²1%
- Bassin de Nyangasub-area289,5 km²overlap288.17 km²1%
- Basin #20300sub-area330,2 km²overlap284.68 km²1%
- Bassin de Niarisub-area2 141 km²overlap283.62 km²1%
- Basin #20430sub-area393,7 km²overlap191.26 km²1%
- Bassin de Nyangasub-area168,7 km²overlap167.91 km²1%
- Bassin de Nyangasub-area147,3 km²overlap146.65 km²1%
- Bassin de Moukalabasub-area141,3 km²overlap140.66 km²1%
- Bassin de Loubetsisub-area791,7 km²overlap109.37 km²1%
- Bassin de Ngongosub-area2 074,8 km²overlap90.20 km²0%
- Basin #02380sub-area594,7 km²overlap78.83 km²0%
- Basin #20320sub-area70,8 km²overlap62.41 km²0%
- Bassin de Nyangasub-area62,7 km²overlap62.38 km²0%
- Bassin de Niarisub-area463,6 km²overlap59.79 km²0%
- Bassin de Ntimasub-area582,5 km²overlap32.03 km²0%
- Basin #00810sub-area475,3 km²overlap26.80 km²0%
- Basin #95250sub-area381,5 km²overlap20.86 km²0%
- Bassin de Moukalabasub-area636,5 km²overlap3.76 km²0%
Lakes (7, top by area)
Rivers / streams (38, ord ≥ 4)
- Nyangaord 6len here729.15 km66%total1103 km
- Bigongoord 5len here194.00 km100%total194 km
- Moukalabaord 6len here130.84 km69%total189 km
- Mouvingaord 3len here125.96 km100%total126 km
- Douigniord 4len here109.61 km100%total110 km
- Dousséoussouord 3len here98.69 km100%total99 km
- Loutsibiord 4len here94.14 km100%total94 km
- Douguégniord 4len here81.20 km100%total81 km
- Mounfoutiord 5len here64.81 km100%total65 km
- Douvetsiord 3len here62.67 km100%total63 km
- Gniakisiord 5len here57.64 km100%total58 km
- Doubandjiord 3len here50.25 km100%total50 km
26 more river segmentssorted by Strahler order + length
- Tabisiord 5len here49.82 km100%total50 km
- Douliord 4len here47.53 km100%total48 km
- Douvounoord 3len here46.80 km100%total47 km
- Magnaneord 3len here41.54 km100%total42 km
- Dounvouord 3len here39.08 km98%total40 km
- Doukiord 4len here31.90 km100%total32 km
- Ngongoord 4len here29.51 km18%total168 km
- Diboundouord 4len here20.12 km100%total20 km
- Moufoulaord 5len here19.75 km100%total20 km
- Vongouord 2len here18.59 km100%total19 km
- Mbaniord 4len here17.07 km100%total17 km
- Bibariord 4len here16.13 km100%total16 km
- Mabouïaord 2len here13.82 km100%total14 km
- Mfigaord 1len here10.32 km100%total10 km
- Dibotsaord 5len here10.27 km100%total10 km
- Mianbaord 2len here9.96 km100%total10 km
- Ngongoord 5len here7.21 km5%total148 km
- Iediord 2len here6.07 km100%total6 km
- Maambiord 2len here5.92 km100%total6 km
- Boumé-Bouméord 4len here5.36 km100%total5 km
- Loubetsiord 7len here4.70 km5%total92 km
- Louzibiord 1len here3.30 km100%total3 km
- Doughoughouord 5len here2.89 km5%total63 km
- Bibongaord 1len here2.46 km100%total2 km
- Louboumouord 1len here2.39 km33%total7 km
- Mounfoutiord 1len here2.10 km100%total2 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,0nW
Built-up
1,9%
Pesticides
11,0kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas17
IUCN Not Reported · 9IUCN II · 3IUCN VI · 3IUCN IV · 2🌊 Marine · 11
Parc National Conkouati-Douli
IUCN IINational Park · 1999
7 714 km²
Conkouati-Douli
IUCN Not ReportedWetland of International Importance (Ramsar Site) · 2007
5 134 km²
Parc national de Moukalaba - Doudou
IUCN IINational park · 2002
4 472 km²
Setté Cama
IUCN VIWetland of International Importance (Ramsar Site) · 1986
2 398 km²
Domaine de chasse de Sette-Cama
IUCN Not ReportedHunting Area · 1966
2 390 km²
Complete list17 protected areas
- Reserve aquatique du Grand Sud du GabonAquatic reserveIUCN Not Reported201727 520 km²
- Parc National Conkouati-DouliNational ParkIUCN II19997 714 km²
- Conkouati-DouliWetland of International Importance (Ramsar Site)IUCN Not Reported20075 134 km²
- Parc national de Moukalaba - DoudouNational parkIUCN II20024 472 km²
- Setté CamaWetland of International Importance (Ramsar Site)IUCN VI19862 398 km²
- Domaine de chasse de Sette-CamaHunting AreaIUCN Not Reported19662 390 km²
- Parc national de MayumbaNational parkIUCN II2002905 km²
- Loubetsi-NyangaWetland of International Importance (Ramsar Site)IUCN Not Reported2015728 km²
- Mont FouariWildlife ReserveIUCN IV1958288 km²
- Mont MavoumbouHunting AreaIUCN VI1956229 km²
- Ngyanga SudHunting AreaIUCN VI1956209 km²
- Domaine de chasse de MoukalabaHunting AreaIUCN Not Reported1962205 km²
- Reserve aquatique de GambaAquatic reserveIUCN Not Reported2017107 km²
- Ngyanga NordWildlife ReserveIUCN IV195888 km²
- Reserve de faune de la Plaine OuangaFaunal reserveIUCN Not Reported196682 km²
- Parc marin de l'embouchure de la NyangaMarine parkIUCN Not Reported201768 km²
- Parc marin de l'embouchure de la BanioMarine parkIUCN Not Reported201739 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN