River
River Derwent
215 km from source to mouth · Australia.
AustraliaFlows into Storm Bay
In numbers
Length
215km
Average flow
120m³/s
Basin
9,249km²
Drop
738m
from 738 m to 0 m
Country
1
The journey
From source to mouth
215 km of river and 18 stops on the way: 1 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmLake St Clairat 738 m
- 0 kmLake Laura0.5 km²
- 18 kmLake St Clair28 km²
- 45 kmLake King William32 km²
- 84 kmWayatinah Lagoon1.9 km²
- 87 kmNive Rivertributary
- 91 kmFlorentine Rivertributary
- 101 kmLake Catagunya1.6 km²
- 113 kmLake Repulse0.9 km²
- 117 kmCluny Lagoon0.6 km²
- 123 kmRiver Ousetributary
- 141 kmClyde Rivertributary
- 146 kmMeadowbank Lake5.1 km²
- 167 kmTyenna Rivertributary
- 171 kmStyx Rivertributary
- 196 kmNew Norfolk5,366 people
- 214 kmBridgewater Bridge
- 214 kmBowen Bridge
- 214 kmJordan Rivertributary
- 215 kmStorm Bayat 0 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in south east Tasmania, Australia
At the mouth it carries 123 m³/s on average: an Olympic pool every 20 seconds. It drops from 738 m to 0 m, 3.4 m per kilometre on average. Its basin covers 9,249 km², about the size of CY. 13,000 people live in it. Highest water: from July to October. It is heavily dammed: reservoirs can hold 115% of a year's flow.
Where to start
- New NorfolkLargest city on its banks · 5,366 people
- Hobart International Airport (HBA)Nearest airport with scheduled flights, 38 km from the cityCar hire at HBA airport (Hobart)Discover Cars · Affiliate link↗
- On the water10 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- From December to MarchThe best months to visit
River Derwent, month by month
Highest water: from July to October
Best months to visit: from December to March.
From about 54 m³/s in the lowest month to 240 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
River Derwent: the basin in numbers
8,102 km² of land send their water to this river. This is what lives on it.
- 13,000people live in the basin
- 2/km²people per km²
- 702maverage altitude of the basin
- 1,071mmof rain a year (basin average)
- 7.9°Caverage air temperature
- 26%protected areas
- 5.0%covered by lakes
- 4.9km³held in reservoirs
What covers the basin
- 78% Forest
- 2% Cropland
- 24% Pasture
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
River Derwent: what you find on the way
- 5WeirsSt Clair Weir, Butlers Weir and 3 more
- 10Boat rampsCynthia Bay Boat Ramp, Lake Repulse Boat Ramp, Millbrook Launching Ramp and 7 more
From OpenStreetMap, within 1.7 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
River Derwent 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.
8lakes on its wayLakeyas
19mountains at the sourcePeakyas
Lakes and reservoirs (8)
Lakes it flows through, by Lakeyas
- Lake Laurakm 00.5km²
- Lake St Clairkm 14 · 200 m deep28km²
- Lake King Williamkm 3532km²
- Wayatinah Lagoonkm 661.9km²
- Lake Catagunyakm 791.6km²
- Lake Repulsekm 880.9km²
- Cluny Lagoonkm 910.6km²
- Meadowbank Lakekm 1145.1km²
Lakeyas is coming soonOpen Lakeyas ↗
Mountains at the source (19)
Within 15 km of the source, by Peakyas
- Mount King William I13 km away
- Mount Olympus12 km away · prominence 592 m
- Wentworth Hills13 km away
- Mount Rufus8.4 km away
- Mount Pitt14 km away
- Mount Hugel9.7 km away
- Mount Ida12 km away
- Bedham Wall2.8 km away
11 more on PeakyasOpen Peakyas ↗
From space
The source and the mouth, seen from orbit
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
River Derwent in pictures
Tributaries
Where it flows, and what flows into it
Tributaries (18)
Also: Styx River, Clyde River, Jordan River, Nive River, Hobart Rivulet, Florentine River, River Dee, Navarre River, River Ouse, Tyenna River, Counsel River, Cuvier River, Travellers Rest River, Lachlan River, Narcissus River, Repulse River, Broad River, Plenty River
Where these numbers come from
| Name, length, places | Wikidata (Q583565) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed along the river network from the point given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | Lakeyas, 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.
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