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River

Tutong River

137 km from source to mouth · Brunei.

BruneiBruneiFlows into South China Sea2nd longest in Brunei

Follow the riverMonth by month

SourceMouth
The river and every tributary in its basin, drawn from RiverATLAS (CC BY 4.0).

In numbers

Length

137km

Average flow

64m³/s

Basin

1,300km²

Drop

58m

from 58 m to 0 m

Country

1

The journey

From source to mouth

137 km of river and 3 stops on the way: 2 towns and cities on its banks, dams, bridges and the tributaries that feed it.

58 m0 m
Sourceat 58 m0 km
Luagan Merimbun0.5 km²31 km
South China Seaat 0 m64 km
0204064 km
  1. 0 kmSourceat 58 m
  2. 31 kmLuagan Merimbun0.5 km²
  3. 63 kmTutong19,151 people
  4. 63 kmSengkarai1,694 people
  5. 64 kmSouth China Seaat 0 m

Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.

River in Brunei

At the mouth it carries 64 m³/s on average: an Olympic pool every 39 seconds. It drops from 58 m to 0 m, 0.4 m per kilometre on average. Its basin covers 1,300 km², about the size of MQ. 26,000 people live in it. Highest water: from November to January. No large dam holds it back: it is one of the world's free-flowing rivers.

Where to start

Tutong River, month by month

Highest water: from November to January

Best months to visit: from February to March.

93
27°319 mmJan
63
27°134 mmFeb
47
27°131 mmMar
48
28°173 mmApr
56
28°214 mmMay
59
28°202 mmJun
61
28°213 mmJul
59
28°199 mmAug
63
28°230 mmSep
74
27°280 mmOct
91
27°352 mmNov
95
27°330 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 47 m³/s in the lowest month to 95 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.

Plan the trip

Plan the trip: boat trips, a bed by the river, a car

Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.

The basin

Tutong River: the basin in numbers

1,016 km² of land send their water to this river. This is what lives on it.

Free-flowingDams upstream can hold only 0.0% of a year's flow: the river still keeps its natural rhythm.
  • 26,000people live in the basin
  • 25/km²people per km²
  • 65maverage altitude of the basin
  • 3,274mmof rain a year (basin average)
  • 27.1°Caverage air temperature
  • 31%protected areas
  • 0.5%covered by lakes

What covers the basin

  • 61% Forest
  • 2% Cropland
  • 1% Pasture
  • 2% Towns and cities

RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.

Along the river

Tutong River: what you find on the way

  • 3Dams
  • 1River beachesSeri Kenangan Beach

From OpenStreetMap, within 1.2 km of the river. Not mapped is not the same as not there.

Cross-checked with our atlases

Tutong River in our other atlases

What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.

  • 1lake on its wayLakeyas
  • 2mountains at the sourcePeakyas

Lakes and reservoirs (1)

Lakes it flows through, by Lakeyas

  1. Luagan Merimbunkm 310.5km²

Lakeyas is coming soonOpen Lakeyas ↗

Mountains at the source (2)

Within 15 km of the source, by Peakyas

  1. Bukit Bedawan10 km away452m
  2. Bukit Supon13 km away49m

Open Peakyas ↗

From space

The source and the mouth, seen from orbit

Tutong River: satellite view of the source
The source14 km across
Tutong River: satellite view of the mouth
The mouth10 km across

Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.

Photos

Tutong River in pictures

Sungai Tutong
Peter in s · CC0
Jalan Pengiran Ahmad in Tutong, Brunei (DSCF2108)
Yu Chu Chin · CC BY-SA 4.0
Tatangan Persiaran Sungai Tutong
Pangalau · CC BY-SA 4.0
Telamba Tutong Bridge 03
Pangalau · CC BY-SA 4.0

Where these numbers come from

Name, length, placesWikidata (Q2461828) · CC0
Course, profile, basinRiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed along the river network from the point given by Wikidata
FlowWaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0
Climate along the riverWorldClim (RiverATLAS), 1970–2000 · CC BY 4.0
Towns, bridges, damsWikidata · CC0; GeoNames · CC BY 4.0
Along the river© OpenStreetMap contributors · ODbL
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons
Our other atlasesLakeyas, Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST

Every source and licence is on the data sources page.

The family

Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?

Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.

beachesCoastyaFind your beach: sea temperature, sun and swimming month by month.Visit
lakesLakeyasEvery lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit
mountainsPeakyasEvery summit in 3D: summit weather, the 0 °C line, huts and trails.Visit
waterfallsCascadyasEvery waterfall: height, flow month by month and when it roars.Coming soonVisit
islandsIslandyasEvery island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit
riversRiveryasEvery river from source to sea: the journey, the flow and the basin in numbers.You are here
canyonsCanyonyasEvery canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit