What is the bathtub effect geography?
The valley’s unique physical geography creates a ‘bathtub effect’ where water can flow in from the catchment faster than it can get out. This may result in floods that can be dangerous to people.
How did the Hawkesbury River get its name?
The Hawkesbury River was given its present name by Governor Phillip in June 1789, after Charles Jenkinson, 1st Earl of Liverpool, who at that time was titled Baron Hawkesbury, after the Cotswolds village of Hawkesbury Upton in England, where the Jenkinsons still live.
How does the Hawkesbury River connect to other water systems?
The Nepean River merges with the Hawkesbury River at an elevation of 1.8 m above sea level. In the northern section of the region, the Colo River is the major tributary of the Hawkesbury River, providing up to 50 per cent of the freshwater flows into the system.
Does it flood in Sydney?
Last night flooding continued to escalate in Sydney’s north-west with some key transport routes being completely engulfed. The flood disaster in Hawkesbury-Nepean Valley was not over, with the North Richmond Bridge completely submerged in floodwaters and the Windsor Bridge closed due to the rising water levels.
What causes flooding of the Hawkesbury?
Sky News Chief Meteorologist Tom Saunders says the “Bathtub Effect” often causes the devastating floods in the Hawkesbury-Nepean region. “Five major more. “While every flood is different, the Warragamba River contributes up to 70 per cent of the water in major floods that have happened in the past 60 years.
How deep is the Hawkesbury River?
Physical characteristics
| Entrance location | –33.56 |
|---|---|
| Catchment area (km2) | 21,624.1 |
| Estuary area (km2) | 114.5 |
| Estuary volume (ML) | 1,541,412 |
| Average depth (m) | 13.8 |
Is Hawkesbury River saltwater?
Known as the Wollondilly in its rugged upper course and as the Warragamba after receiving the Nattai and, later, the Nepean rivers, it becomes the Hawkesbury after its junction with the Grose. It then continues on a meandering course for 100 miles (160 km), becoming a salt tidal stream after receiving the Colo River.
Where does Hawkesbury flow?
Hawkesbury River, river rising in the Great Dividing Range north of Lake George, New South Wales, Australia, and flowing 293 miles (472 km) north and east to the Tasman Sea at Broken Bay.
Is the Hawkesbury River saltwater or freshwater?
Wisemans Ferry, about 70km upstream, has brackish water. The tides are 2.5 hours later at Wisemans Ferry than Fort Denison. Above here, the river changes character into a popular waterski, wakeboarding and wakesurfing playground. The water is fresh by the time you reach the Colo River at Lower Portland.
When was the last big flood in the Hawkesbury?
This week sees a significant but little-heralded anniversary in New South Wales: 150 years ago, on the 23rd of June, a devastating flood peaked at Windsor on the Hawkesbury River.
How long is the Hawkesbury River?
74.6 miHawkesbury River / Length
How many times has the Hawkesbury River flooded?
The 10 historical flood events used were in 1961, 1964, 1975, 1978, 1986, 1987, 1988 (two events), 1989 and 1990.
How many times has the Hawkesbury flooded?
What are the impacts of floods in the Hawkesbury-Nepean Valley? There have been 131 Moderate to Major floods in the Hawkesbury-Nepean since European settlement.
Can you fish in the Hawkesbury River?
The Hawkesbury is best known for producing some of NSW’s largest mulloway. Fish exceeding 1.6m and 40kg have been taken from these waters. While these huge fish aren’t common nowadays, the Hawkesbury still offers a good chance at quality fish around the magical metre mark.
Is it safe to eat fish from Hawkesbury River?
Fishers advised not to consume shellfish from the lower Hawkesbury River.
Where does the Hawkesbury start and end?
Broken BayHawkesbury River / Mouth
Where is the source of the Hawkesbury River?
Nepean River
Grose River
Hawkesbury River/Sources
When did Hawkesbury flood 2021?
The Bureau of Meteorology said the Hawkesbury River at Windsor (WPS) may reach around 13.30 metres Wednesday evening, with major flooding above the March 2021 event. Further rises are possible. At North Richmond, the river had risen to 13.7 metres at 2.41pm.
What is the Hawkesbury River railway bridge?
Official souvenir brochure to mark the opening of the first Hawkesbury River railway bridge. The rail line that linked Homebush (now known as Strathfield) with Waratah had been one of the toughest pieces of railway engineering yet tackled in the Australian colonies (Australia as a nation had not yet materialised).
How much did it cost to build the Hawkesbury Bridge?
This doesn’t count the Hawkesbury Bridge itself (which cost another £340,000) nor the £360,000 section of track from the north bank of the river to Gosford, inlcuding the Woy Woy tunnel, lined with 7 million bricks.
When was the first railway bridge built in Australia?
When the first railway bridge over the Hawkesbury River was opened on May 1, 1889, it completed the final link in a rail system that linked NSW with South Australia, Victoria and Queensland – albeit not with uniform gauges. The rail line that linked Homebush (now known as Strathfield) with Waratah had been one of …