Riverine flooding information for communities including Ouse, Ellendale and north to Derwent Bridge and Bronte Park, in the upper reaches of the Derwent Catchment.

Version 1 December 2024

To see the maps in more detail, lihat Peta Banjir Strategik Tasmania.

This plan covers areas prone to flooding from the:

• Derwent River
• Ouse River
• Nive River
• Dee River
• Jones River, and
• nearby minor waterways.

This part of the upper Derwent catchment has many large dams that will affect flood behaviour.

Rainfall events in this area may affect some parts without affecting others. The maps in this guide show the likely peak extent of flooding that has a 2%, 1% and 0.5% chance of happening in any one year (known as Annual Exceedance Probability, or AEP).

Major flooding over roads and bridges could cut off Ouse from other towns. Some properties near the river in Ouse could flood. Rural areas around Ouse can flood, impacting livestock, fences, equipment and lives. The Ouse River can rise quickly when Lake Augusta begins to overflow.

There are likely to be road closures during a flood in this area, including parts of the Lyell Highway near

• Ouse,
• Wayatinah,
• Tarraleah,
• Derwent Bridge and
• other locations.

Ellendale could be cut off with several roads flooded. The Wilderness Hotel in Derwent Bridge could be cut off. Campgrounds and parks in the area are likely to flood.

Miena, Brady’s Lake, Dee and Fentonbury are unlikely to be affected by flooding, but there may be power and internet cuts and flooded roads isolating these communities.

There is another flood guide for Bothwell to Hamilton and areas around the River Clyde.

In your lifetime, you are likely to experience flooding such as that shown in the maps. Tasmanians need to prepare for flood events that may not happen often, as well as the minor flooding they may have experienced.

Even if your home is not inundated, you should be prepared for isolation and potential power and telecommunications outages.

Travel in the area may be difficult or impossible until roads are clear.  If you are safe at home or elsewhere, it is usually best you stay where you are until the flooding subsides, unless there is an emergency. If you need to evacuate, you should leave early, before flood waters rise.

Listen to ABC local radio 936AM for warnings and advice, but please note that radio coverage may be poor in many parts of this area. It may be difficult to access up to date information in a situation that can change very quickly.

Adakah anda berisiko banjir?

The Derwent catchment has a long history of flooding. Most recently, in late August 2024, a prolonged wind and rain event caused widespread road closures and damage. In 2016, widespread flooding in this area caused the tragic loss of a life. There was also extensive damage to property, equipment, significant loss of livestock and community assets.

Other flooding events in the upper Derwent include August 2009, August 2005, August 2004, April 1996, August 1970, April 1960 (very significant), 1944, and others.

Apa yang patut saya buat?

• Check the map to see whether your home or business could flood.
• Assess your home or business and prepare it to reduce possible flood damage.
• Periksa sama ada anda dapat sampai ke rumah, tempat kerja atau sekolah dengan selamat semasa banjir.
• Prepare a Home Emergency Plan.
• If you may be isolated and you must have access to services, you may need to evacuate early.

Floods like the one shown in the map, or worse, will occur again. No two floods are the same.

If you live in a low-lying area or near a watercourse, your house may flood. Even if your home is safe, you may need to detour around flooded areas or your road access may be cut. Never drive into or enter flood waters. Roads and bridges may be washed out or unsafe. Avoid travel during floods.

Mengetahui apa yang perlu dilakukan boleh menyelamatkan nyawa anda dan membantu melindungi harta benda anda. Mempunyai Pelan Kecemasan Rumah adalah salah satu cara terbaik untuk bersiap sedia. Tentukan pemicu cuaca dan hujan untuk masa bertindak.

Bureau of Meteorology Forecasts, Warnings, and Observations

The Bureau issues a Flood Warning, Severe Weather Warning and/or Thunderstorm Warning for heavy rainfall that may lead to flash flooding whenever heavy rain is expected in an area. The time between the warning and heavy rain occurring can vary from an hour to 24 hours or more.

Whenever rain that may lead to flooding in the upper Derwent is expected, the Bureau will issue:

• A Flood Watch – a “heads up” early advice of forecast weather that may lead to flooding
• A Flood Warning – giving a prediction of when flooding is likely to develop at gauge locations and possibly forecasting the likely peak river level.  Warnings are updated regularly.
• SES and the Bureau will issue warnings when the Ouse and Derwent Rivers reach the following levels.

River gauges	Alert	Risih	Moderate	Major
Ouse River at Ashton	2.4m	2.4m	3.2	4.5
Ouse River at 3B Weir		3.0	3.7	4.3
Derwent River below Meadowbank Dam	4.1m	4.1m	6.1m	7.3m

Rainfall Observations at Ouse, Hermitage, Lake St Clair, Derwent Bridge, Bronte Heights and Wayatinah can indicate possible flood risks. Given the very short warning times, it is best to act on the predictive BoM warnings rather than wait for any flood alerts during rainfall.

The Mt Koonya Radar is useful to be aware in real-time where heavy rainfall is falling.  Radar Rainfall estimates can also fill in gaps in areas where there are no rainfall stations.

Fahami amaran dan maklumat penting

Sentiasa peka dengan apa yang berlaku di sekeliling anda. Periksa ramalan, pemerhatian dan amaran dengan kerap.

• TasALERT.com
• stesen radio ABC tempatan anda atau
• yang Biro Meteorologi laman web.

	Nasihat (Kuning) Satu insiden telah berlaku. Tiada bahaya segera. Nantikan perkembangan sekiranya keadaan berubah.
	Tonton dan Bertindak (Oren): Terdapat peningkatan tahap ancaman. Keadaan sedang berubah dan anda perlu mula mengambil tindakan sekarang untuk melindungi diri anda dan keluarga anda
	Amaran Kecemasan (Merah): Amaran Kecemasan adalah tahap amaran tertinggi. Anda mungkin dalam bahaya dan perlu mengambil tindakan segera. Sebarang kelewatan kini meletakkan nyawa anda dalam risiko.
	Kemas kini komuniti (Biru): Maklumat dan kemas kini khusus untuk komuniti yang terjejas mengenai peristiwa atau insiden tertentu.
	Insiden (Putih) an incident is the initial occurrence of an event before it becomes an emergency warning. As soon as an incident is reported, TasALERT publishes basic information including the type and location of incident.

For more information see www.ses.tas.gov.au/warnings/ .

Flood levels

While no two floods are the same, the following describes what you can expect at different flood levels around the area. Even if your property is not flooded, you need to think about access. Different levels of rainfall can cause flooding depending on its intensity, duration and how wet the ground is beforehand and where the rain falls. The Bureau of Meteorology will issue flood warnings of three levels, minor, moderate or major.

Upper Derwent Catchment flooding levels

Banjir kilat

A minor flood can inundate low lying paddocks.  Stock should be moved for their safety, consider the location of equipment and mobile infrastructure like irrigation equipment.  There may also be some flooding across low-lying minor roads and riverside areas.

Banjir sederhana

There is more extensive flooding of agricultural land and some buildings may be impacted to above floor height. Some properties may be isolated for a few hours as minor roads become flooded.

Banjir besar

Major flooding may inundate multiple roads, including major roads, and some residential properties are at risk of inundation.

The following roads may be flooded:

• The Lyell Hwy at Ouse
• The Lyell Hwy between Derwent Bridge and Bronte – several locations
• Victoria Valley Rd heading north from Ouse
• Lake St Clair Rd near Derwent Bridge
• Ellendale Rd in multiple places – the town of Ellendale could be split in two
• Wayatinah Rd and the Lyell Hwy near Wayatinah

Many other roads in the area, depending on where the rain falls and how heavy it is.

Properties may be flooded in low-lying areas around:

• Wayatinah
• Derwent Bridge
• Ouse north of the Lyell Highway
• Ellendale near the Jones River.

In the areas outside of the towns, extensive flooding would occur in farmland and natural areas. Livestock and farming equipment could be at risk in low lying areas.

Ketahui risiko anda, bersiap sedia, kurangkan risiko di mana boleh, berhubung dengan orang lain, sentiasa berwaspada dan bertindak selamat.

Sebelum banjir

Ketahui risiko anda

Banjir sering berlaku di Tasmania dan boleh menyebabkan kerosakan yang meluas dan ketara. Dalam tempoh 200 tahun kebelakangan ini, terdapat 78 kematian berkaitan banjir di Tasmania. Panduan ini adalah untuk membantu anda memahami risiko banjir di kawasan anda.

2. Sediakan rumah anda

Miliki pelan kecemasan yang meliputi taufan dan banjir

Berfikir tentang apa yang akan anda lakukan semasa ribut atau banjir bermakna anda lebih bersedia dan semua orang lebih selamat. Miliki pelan kecemasan yang difahami oleh semua orang dalam isi rumah anda. Terdapat senarai semak untuk membantu anda memikirkan pelan anda – lihat Bersedia untuk Kecemasan – Panduan untuk individu dan isi rumah bersiap sedia menghadapi kecemasan. 
Periksa pelan anda dengan kerap dan uji ia dengan setiap ahli isi rumah memikirkan senario banjir yang mungkin menjejaskan isi rumah anda.

Sediakan Kit Kecemasan

Uji bateri dalam radio dan lampu suluh secara berkala.

3. Reduce your risk from flooding where you can

• Pertimbangkan tentang ribut, banjir dan bahaya lain semasa membeli, menyelenggara atau membangunkan hartanah.
• Potong atau alih pokok dan dahan yang menjulur ke atas rumah, perniagaan anda atau berdekatan talian elektrik di kawasan anda.
• Pastikan saluran air dan perparitan anda bersih.

4. Connect with others

Kenali jiran anda dan libatkan diri dalam komuniti anda. Komuniti yang saling berhubung adalah komuniti yang lebih selamat dan lebih berdaya tahan semasa kecemasan dan dapat membantu semua orang pulih dengan lebih baik selepas itu. Periksa sama ada keluarga dan jiran selamat dan sedar tentang apa yang berlaku.

See for example the Huon Valley Good Neighbour project.

Semasa

5. Sentiasa terkini

Sentiasa peka dengan apa yang berlaku di sekeliling anda. Periksa ramalan, pemerhatian dan amaran dengan kerap. 

• TasALERT 
• stesen radio ABC tempatan anda atau
• yang Biro Meteorologi laman web.

6. Bertindak Selamat

• Mengawasi kanak-kanak.
• Bersiap sedia untuk kemungkinan gangguan bekalan elektrik, air atau internet.
• Pastikan peti kecemasan anda bersedia untuk digunakan.
• Jauhi kawasan yang dinaiki air seperti longkang. JANGAN SESEKALI berjalan, bermain, menunggang atau memandu dalam air banjir. Anda tidak selalu dapat melihat apa yang ada di bawah air atau betapa dalamnya atau derasnya air itu. Sangat mudah untuk dihanyutkan dan lemas dalam air yang bergerak pantas sedalam 20sm. Air banjir boleh berbahaya.

Bila rumah anda mungkin dinaiki air

• Letakkan barangan isi rumah di tempat yang tinggi untuk meminimumkan kerosakan yang mungkin berlaku.
• Padamkan bekalan elektrik dan gas jika selamat untuk berbuat demikian. 
• Cara yang baik untuk menghentikan aliran kumbahan masuk semula ke rumah anda ialah dengan meletakkan beg pasir di dalam beg plastik dan menggunakannya untuk menyumbat tandas serta menutup longkang dan singki.
• Pergi selagi anda boleh keluar dengan selamat.

Jika anda perlu berpindah

• Ikuti nasihat dari SES / Polis Tasmania.  
• Ambil kit kecemasan anda. 
• Pergi ke tempat rakan atau keluarga yang lebih selamat atau pusat pemindahan. 
• Beritahu orang lain ke mana anda telah pergi.

Jaga haiwan peliharaan anda

Anda bertanggungjawab terhadap haiwan anda semasa kecemasan. Sekiranya anda mempunyai haiwan peliharaan dan haiwan lain, anda akan mengambil masa lebih lama untuk berpindah sekiranya berlaku banjir atau kecemasan lain. Pindahkan ternakan dari kawasan yang terdedah kepada banjir **jauh sebelum** paras air banjir mungkin naik. Untuk maklumat lanjut, sila lihat

• Panduan RSPCA untuk persediaan haiwan dalam kecemasan
• Nasihat Majlis Lembah Huon tentang penyediaan rancangan kecemasan haiwan peliharaan
• yang Primary producer farm flood readiness toolkit.

Avoid travelling during storms and after storms

• Jangan melancong. Pelancong melambatkan perkhidmatan kecemasan dan menyebabkan kemalangan.
• Berhati-hatilah terhadap bahaya seperti
  • air di atas jalan
  • talian elektrik rosak
  • tanah runtuh
  • jalan rosak
  • pokok tumbang atau bumbung besi.
• Jangan memandu melalui air banjir. Kebanyakan kematian dan penyelamatan dalam banjir disebabkan oleh orang yang memandu melalui air banjir.
• Pandu perlahan dan pasang lampu hadapan anda di jalan yang tidak dinaiki banjir.

Selepas

• Terus ikuti perkembangan terkini dari ABC Local Radio, pembukaan semula jalan, mesyuarat komuniti, dll.
• Jika anda meninggalkan rumah anda, jangan pulang ke rumah sehingga SES atau Polis Tasmania memberitahu anda selamat untuk berbuat demikian.
• Berhati-hatilah terhadap bahaya jalan raya, seperti lumpur atau serpihan di jalan, jalan/jambatan yang rosak dan kru yang sedang bekerja membersihkan dan membaiki.

Jika rumah anda rosak

• Tinggal di aras tanah semasa memeriksa kerosakan. Berhati-hatilah dengan pokok tumbang, kaca pecah, bumbung yang longgar atau bahaya lain.
• Pakai but kuat, sarung tangan dan pakaian pelindung. 
• Gunakan lampu suluh, jangan gunakan mancis atau lilin di dalam bangunan yang dinaiki banjir. 
• Rebus semua air minuman sehingga anda diberitahu air paip selamat semula.
• Jangan hidupkan bekalan elektrik atau gas sehingga ia diuji oleh juruelektrik atau pemasang gas bertauliah bagi memastikan keselamatan.
• Jika rumah anda rosak dan anda perlu menginap di tempat lain, bawa bersama kit kecemasan dan haiwan peliharaan anda
• Ambil gambar kerosakan jika selamat untuk anda berbuat demikian dan hubungi syarikat insurans anda.
• Mengawasi kanak-kanak.
• Periksa jiran dalam keadaan baik.

Untuk maklumat lanjut, sila layari www.ses.tas.gov.au

Kekal dimaklumkan dan maklumat lanjut

Current warnings (TasAlerts) TasALERT.com

Biro Meteorologi (BoM)

Penyiar Kecemasan ABC 936AM

TASSES Social Media

• facebook.com/sestasmania

Persediaan Menghadapi Kecemasan Banjir ses.tas.gov.au/plan-prepare/flood 

Central Highlands Council    centralhighlands.tas.gov.au               03 6259 5503

Perkhidmatan Geganti Kebangsaan (NRS) relayservice.gov.au

Penafian

The maps show potential flooding risks from consistent levels of rainfall across catchments, such as a 1% Annual Exceedance Probability (AEP).  In flooding events, rainfall is likely to be more inconsistent across a catchment, so these flood maps should be considered indicative only.  The mapped areas of flood risk show higher probability of inundation. Other areas have lower probability of flooding, but in severe and rare events (rarer than 1%AEP), other lower areas may be also at risk of inundation.

Maklumat dalam panduan ini adalah terkini pada tarikh penerbitannya. Walaupun segala usaha telah dibuat untuk memastikan kesahihan dan ketepatan data yang dibentangkan, Perkhidmatan Kecemasan Negeri tidak bertanggungjawab ke atas kesilapan atau ketinggalan data. Sila lihat piawaian Hak Cipta dan Pernyataan Penafian Kerajaan Tasmania untuk maklumat lanjut.