Riverine and flash flooding flooding information for the Derwent River and Lachlan River at New Norfolk. See also the related flood guide for the Lachlan River above New Norfolk.

DRAFT – Please email any comments to ses@ses.tas.gov.au

要更详细地查看地图，, 查看塔斯马尼亚战略洪水地图.

Parts of New Norfolk are subject to flooding from the Derwent and/or from the Lachlan Rivers.  The Derwent and Lachlan Rivers may flood at the same time or at different times. Low lying areas may also be impacted by storm water runoff following local high rainfall events.

The maps show the estimated flood levels for widespread rain that has a 2%, 1% and 0.5% chance of happening any year (% Annual Exceedance Probability). You are likely to experience these levels of flooding at least once in your lifetime. 

Derwent River flooding

Widespread heavy rainfall in the Derwent catchment as far away as Lake St Clair and yingina/ Great Lake can flood low-lying riverside areas of New Norfolk. The bridge across the river may be cut.  Such floods can isolate the New Norfolk and surrounding areas.

Tides, melting snow, the level of soil moisture and the dam levels can impact flood levels.  During storms, sea levels can rise and this can increase flooding at high tide. However, dam level management is not likely to have a significant impact on flood levels during a major flood.

Lachlan River flooding

Flooding from the Lachlan River is fed by high rainfall on kunanyi / Mount Wellington. It is difficult to predict and there is often little to no warning.  Tynwald Park and the nearby highway can become inundated.  See the related flood guide for the Lachlan River for more details.

您有洪水风险吗？

New Norfolk has a long history of flooding.  The most significant flood since European settlement in 1960 flooded many homes and other buildings near the river and isolated the area. Flooding also happened in 1916, 1922, 1923, 1924, 1946, 1947, 1948, 1951, 1952, 1953, 1958, 1962, 1970, 1971, 1974, 1975, 1980, 1988, 1991, 1994, 2007, 2009, 2011, 2016 and 2018.

It is important to be prepared for major flooding events that may not have happened within most people’s living memory.

我应该怎么做？

• Check the map opposite to see whether your home or business is likely to be at risk of flooding during a flood.
• Prepare a Home Emergency Plan, including whether you need to evacuate in advance of a flood, where you will go and what you need to take. See 做好应急准备 – 个人和家庭应急准备指南。. 
• If you have a business in the area, you should have a plan that covers flooding.  Business Tasmania can help– see www.business.tas.gov.au/manage_a_business/ 
• If you need to evacuate or return home during a flood, make sure your route is safe.
• Asses your home or business and know what you need to do to prepare it to minimise possible damage from water inundation.

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

如果您住在低洼地区或靠近水道，您的房屋可能会被淹没。即使您的家是安全的，您也可能需要绕过洪水地区，或者您的道路通行可能会受到阻碍。切勿驾车进入或进入洪水区域。道路和桥梁可能被冲毁或不安全。请避免在洪水期间出行。.

了解该怎么做可以拯救你的生命并帮助保护你的财产。制定家庭应急计划是准备工作的最佳方法之一。决定天气和降雨触发条件，以便知道何时采取行动。.

澳大利亚气象局天气预报、警告和观测

The Bureau of Meteorology monitors rainfall and river levels in the upper reaches of the Derwent River.  They issue flood warnings when river levels are likely to reach the following heights. SES works closely with the Bureau to provide timely warnings where possible.

River gauges	Alert	Minor	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
Clyde River at Bothwell	0.9m	2.0m	3.0	4.0
Styx River at Bruces Bridge		2.0m	n/a	n/a
Derwent River below Meadowbank Dam	4.1m	4.1m	6.1m	7.3m
Derwent River at Macquarie Plains	4.0m	4.0m	5.0m	6.7m
Plenty River at Feilton		2.8m	n/a	n/a
Derwent River at New Norfolk		2.0m (2.3m estimated 50% AEP)	4.0m (4.3m estimated 10%AEP)	6.0 (6.3m  estimated 1% AEP)

Notes

• % AEP (Annual Exceedance Probability) is estimated and only a rough guide. Rainfall levels and so flood levels can differ greatly across the catchment in a flooding event. More precise estimates of gauge and flood warning levels is a work in progress.
• A major level in the upper catchment may not translate to a major level at New Norfolk if there is not high rainfall in other parts of the catchment.
• While previously the 1960 flood was considered about a 0.75%AEP event (1 in 150 year event), more recent information suggests the event was more rare, that is, with less than a 0.5% chance of happening any year.

For information on flood warnings in the Lachlan River see the related Lachlan River Flood Guide.  In summary, there are no water level gauges on this river – the short catchment does not give enough time to issue a warning before flooding arrives.  Keep an eye on rainfall on kunanyi/ the Wellington Range.

Whenever 大雨 is expected in an area that may lead to flooding, the Bureau issues

• Severe Weather Warning and/or
• Thunderstorm Warning for heavy rainfall that may lead to flash flooding.

Download BOM Weather app and set your location to receive push notifications of warnings (more details at www.bom.gov.au/app/) .

Listen to ABC 936AM or go to tasalert.com for warnings.

理解警告和关键信息

留意周围发生的事情。定期查看预报、观测和警报。.

• TasALERT.com
• 您当地的ABC广播电台 或
• 这 气象局 网站.

	建议 (黄色): 事件已发生。无即时危险。请保持关注，以防情况发生变化。.
	观察并行动（橙色）： 威胁级别有所提高。情况正在变化，您需要立即开始采取行动来保护您和您的家人
	紧急警报（红色）： 紧急警报是最高级别的警报。您可能面临危险，需要立即采取行动。任何耽搁都可能危及您的生命。.
	社区更新（蓝色）： 关于特定事件或事件，受影响社区的具体信息和最新动态。.
	事件（白色）： an incident is the initial occurrence of an event before it becomes an emergency warning. As soon as an incident is reported, TasALERT published basic information including the type and location of incident.

Flood levels around the Derwent River

While no two floods are the same, the following describes what is likely to happen if there is flooding around the area. Even if your property is not flooded, you need to think about access.

The rainfall amounts that might cause such an event are examples. Other levels of rainfall can cause flooding depending on

• where the rain falls
• how heavy the rain is
• how long the rain lasts, and
• how wet the ground is beforehand.

Melting snow can also contribute to flooding.

Minor flooding (Derwent River level at New Norfolk is at least 2m)

This level of flooding has an estimated 20-50% chance of happening any year.

• Water spills over riverbanks and covers nearby low-lying areas. 
• There are some areas of Tynwald Park and New Norfolk’s riverside parklands inundated.
• Agricultural and horticultural land on river flats around Sorell Creek may be at risk.  Livestock should be moved from these areas.

Moderate flooding (Derwent River level at New Norfolk is at least 4m)

This level of flooding has an estimated 5-10% chance of happening any year.

• There is extensive flooding of Tynwald Park, riverside parkland areas and some low-lying nearby properties, mostly below floor height.
• The caravan park and other riverside facilities are likely to be impacted..
• Low lying areas of railway line may be impacted.

Major flooding (Derwent River level at New Norfolk reaches at least 6m).

Widespread heavy rainfall across the catchment that has a 1- 2% chance or less of happening can cause major flooding.  This level of widespread rainfall around Bushy Park might be more than for example:

• 51mm at Bushy Park and 61mm at Derwent Bridge over 6 hours
• 57mm at Bushy Park and 89mm at Derwent Bridge over 12 hours
• 73mm at Bushy Park and 129mm at Derwent Bridge over 24 hours
• 90mm at Bushy Park and 183mm at Derwent Bridge over 48 hours

Note the level of flooding can depend on many factors, such as where the rain falls and how widespread it is, and how wet the catchment is beforehand.  Areas that are likely to be flooded from Derwent River flooding in a major flood event include:

• The Lyell Highway/ Molesworth Road intersection
• New Norfolk Esplanade
• Upper Boyer Road / Rocks Road from Boyer Road to Station St
• Lyell Highway Derwent crossing at New Norfolk and lower Hamilton Road
• Glenora Road #95-#119
• 130 Hamilton Road
• Lyell Highway Back River crossing
• Glenora Road Glen Fern Creek
• Glenora Road W of New Norfolk
• Derwent Valley Railway, various areas

Areas that are likely to be flooded from Lachlan River around New Norfolk include:.

• Tynwald Park and nearby Lyell Highway
• Lower Road on the Lachlan River
• Humphrey St/ lower Lachlan Rd

Please see the related flood guide for the Lachlan River for more details.

In a major flood event, the New Norfolk area may become isolated from Hobart and upstream areas due to water across the Lyell Highway, Boyer Road and Plenty Road. The areas on the north and south side of the river are likely to become isolated as the bridge becomes flooded or dangerous.  Other potential areas of isolation are:

• South-eastern New Norfolk/ Brookside
• New Norfolk Central Business District (south of the Derwent)
• New Norfolk north side river, Lawitta, Magra
• Pulpit Rock Road
• Glenora Road
• Glenfern Road and surrounds
• Lachlan and surrounds

If flooding levels reach the same heights as the 1960 floods in New Norfolk (6.8m at New Norfolk), flooding in the areas already listed will be deeper, and water could spread to the following areas.

North side of the Derwent River     

• Extension of flooding along Rocks Road to above the rail line
• Properties on Golding Avenue, Oast Street, Station Street, Craw Street
• Lower Back River Road
• The rail line west of bridge and all properties below

South side east side of the New Norfolk Bridge over the Derwent 

• Bridge Street, ‘The Woodbridge’ accommodation riverside building
• All properties on Page Avenue and Ferry Street, Montegu Street, Alfred Street
• The sewage works

South side Derwent River west of the bridge     

• Glenora Road to past Water treatment plant and further low-lying properties near the river
• The bottom end of Glenfern Road

Image: New Norfolk in flood 1960 by Pauline Plunkett

Go to tasalerts.com or listen to ABC local radio for detailed up to date information and advice during heavy rainfall events.

了解风险，做好准备，尽可能降低风险，与他人联系，保持警惕，并安全行事。.

洪水之前

了解您的风险

塔斯马尼亚州经常发生洪水，可能造成广泛而重大的损失。在过去的 200 年里，塔斯马尼亚州有 78 人死于与洪水有关的事故。本指南旨在帮助您了解您所在地区的洪水风险。.

2. 准备您的家庭

制定涵盖风暴和洪水的应急计划

考虑一下在风暴或洪水来临时你会怎么做，这意味着你会有更好的准备，每个人都会更安全。制定一个你的家庭成员都明白的应急计划。有一些清单可以帮助你完善你的计划——请看 做好应急准备 – 个人和家庭应急准备指南。. 
定期检查您的计划，并让家中的每一位成员都模拟可能影响您家庭的洪水场景进行演练。.

准备一个应急包

定期测试收音机和手电筒里的电池。.

3. 尽可能降低洪水风险

• 在购买、维护或开发房产时，请考虑风暴、洪水和其他危险。.
• 修剪或移除您家中、商铺上方或您物业附近电线上方的树木和树枝。.
• 保持雨水槽和排水沟畅通。.

4. 与他人联系

认识你的邻居并参与社区活动。一个联系紧密的社区在紧急情况下更安全、更有韧性，并且有助于每个人在事后更好地恢复。检查家人和邻居是否安全，是否了解正在发生的情况。.

See for example the Huon Valley Good Neighbour project.

于

5. Keep up to date

留意周围发生的事情。定期查看预报、观测和警报。. 

• 塔斯警报 
• 您当地的ABC广播电台 或
• 这 气象局 网站.

6. Act Safe

• 看管好孩子。.
• 为应对可能的电力、供水或网络中断做好准备。.
• 检查您的应急包是否已准备好。.
• 避开积水区域，如排水沟。. 永不 在洪水期间徒步、玩耍、骑车或驾车。您无法分辨水下有什么，也无法判断水深或水流速度。在仅 20 厘米的快速流动的水中，很容易被冲走并溺水。洪水可能很危险。.

当地面发生洪水时

• 将家用物品放在高处以最大程度地减少可能的损坏。.
• 如果安全的话，请关闭水电煤气。. 
• 一种防止污水倒灌回家的好方法是将沙袋放入塑料袋中，然后用它们堵住马桶、覆盖排水管和水槽。.
• 趁还能安全离开就走。.

如果您需要撤离

• 遵循 SES / 塔斯马尼亚警方 的建议。.  
• 带上你的应急包。. 
• 去安全地点或避难中心与亲友会合。. 
• 让别人知道你去了哪里。.

照顾好您的动物

在紧急情况下，您有责任照顾好您的动物。如果您有宠物和其他动物，在洪水或其他紧急情况下疏散需要更长的时间。在洪水可能上涨之前，将牲畜转移到易受洪水影响的地区。欲了解更多信息，请参阅

• RSPCA 应急动物准备指南
• Huon Valley Council’s advice on preparing an emergency pet plan
• 这 初级生产者农场防洪准备工具包.

避免在风暴期间和风暴过后出行

• 不要去观光。游客会延误紧急服务并造成事故。.
• 注意诸如
  • 路面积水
  • 受损的电力线
  • 山体滑坡
  • 损坏的道路
  • 倒下的树木或屋面板。.
• 切勿冒险涉水。洪水中的大多数死亡和救援事件都与驾车涉水有关。.
• 在未受洪水影响的路段，请慢行并打开车头灯。.

之后

• 请继续收听 ABC 本地广播电台的最新消息、道路重新开放信息、社区会议等。.
• 如果您离开了家，在紧急事务管理署（SES）或塔斯马尼亚警方告知您可以安全返回之前，请勿回家。.
• 注意道路危险，例如路面上的泥土或碎屑、损坏的道路/桥梁以及正在进行清理和维修的工作人员。.

如果您的房屋遭到损坏

• 在检查损坏时，请留在地面。注意倒下的树木、碎玻璃、松动的屋顶或其他危险。.
• 穿结实的靴子、手套和防护服。. 
• 在受洪水影响的建筑物内部，请使用手电筒，切勿使用火柴或蜡烛。. 
• 饮用水必须煮沸，直到被告知自来水安全为止。.
• 在经过持证电工或燃气技师安全检测前，请勿开启电源或燃气。.
• 如果您的房屋受损，需要住到别处，请带上您的应急包和宠物。
• 如果安全，请拍摄任何损坏的照片并联系您的保险公司。.
• 看管好孩子。.
• 检查邻居是否安好。.

欲了解更多信息，请访问 www.ses.tas.gov.au

保持知情和获取更多信息

Current warnings (TasAlerts) alerts.tas.gov.au

气象局 (BoM)

Emergency Broadcasters ABC 936AM

TASSES Social Media

• facebook.com/sestasmania

Preparing for Flood Emergencies ses.tas.gov.au/plan-prepare/flood 

Derwent Valley Council  derwentvalley.tas.gov.au   6261 8500

全国接力服务 (NRS) relayservice.gov.au

免责声明

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.

本指南中的信息在出版日期时是准确的。尽管已尽一切努力确保所提供数据的有效性和准确性，但州应急服务部门不对数据错误或疏漏负责。请参阅标准 塔斯马尼亚州政府版权与免责声明 更多详情.