Riverine and flash flooding information for communities and properties on the Tyenna River and its tributaries

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.

Much of Westerway township is prone to flooding, as is the lower part of Mount Field National Park.  There are some private properties along the river upstream of Westerway that can become flooded.

Heavy rain in the Tyenna River catchment can also flood Gordon River Road, isolating many properties.

Agricultural areas and the picnic area at Mount Field National Park can be impacted by more common heavy rain events in the Tyenna catchment. The entrance to the National Park may be closed.

Areas around Ellendale may also become isolated due to flooding around the Ellendale Road intersection with Gordon River Road if there is also flooding along the Derwent River. If there is widespread rain around the Derwent River catchment, all areas around the Tyenna River may become isolated for possibly a few days.

The maps show the likely areas to be flooded in a rain event that has a 2%, 1% and 0.5% chance of happening any year (% Annual Exceedance Probability). Events with a 2% chance of happening any year can have major impacts around Westerway, inundating homes, other buildings and roads, and isolating many properties.  You are likely to experience this level of flooding at least once in your lifetime.  Tasmanians need to be prepared for levels of flooding most people may not have experienced.

The Tyenna River is fast flowing, and so flood waters are likely to be hazardous. Flood waters are likely to drop quickly once rain stops falling in the catchment.

您有洪水风险吗？

The area most recently had moderate flooding in July 2016, when the lower part of Mount Field National Park was flooded.  Westerway experienced major flooding in March 1931 and May 1948. This impacted buildings, the highway and the railway line. Such levels of flooding are likely to happen again. It is important to be prepared for 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 Tyenna River can rise quickly after rainfall and so there can be little warning of flooding.  There is a river gauge on the river at Newbury (between Maydena and National Park) – see http://www.bom.gov.au/tas/flood/rain_river.shtml . There are no Bureau of Meteorology formal minor, moderate and major riverine flood warnings issued for the Tyenna River.  The short river length between Newbury and Westerway means there would not be enough warning time. 

Rainfall levels across the catchment during heavy rain events can give less accurate but more timely warning of possible flooding along the Tyenna River. Go to www.bom.gov.au/tas/ . Rainfall gauges in or near the catchment include:

• Tim O’Shea
• Meuller Ridge
• Maydena
• Newbury
• Mt Field National Park (Weir Road)

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.

The time between the warning and heavy rain falling can vary from an hour to 24 hours or more. It is best to act on the warnings from the Bureau of Meteorology rather than wait for local flooding alerts.

这 Mt Koonya Radar is useful to see when and where heavy rainfall is falling and is available on the BOM Weather app and website.

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 Tyenna 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.

轻度洪水

• Water spills over riverbanks and covers nearby low-lying areas.  Agricultural and horticultural land on river flats may be at risk.  Livestock should be moved from these areas.
• There may be some flooding of low-level roadways along minor roadways and driveways.
• Some low-lying properties may have flooding around buildings below floor level, particularly properties on the river side in Westerway.
• There may be some areas of the Mount Field National Park picnic grounds inundated.

中度洪水

• There is more extended and deeper flooding of agricultural land along the river flats with some stock losses if not moved. There may be damage to fences and equipment such as pumps.
• Flooding may reach above floor heights of some low-lying houses and other buildings particularly on the river side of the Gordon River Road through Westerway.
• Some properties above low-lying bridges may become isolated.
• There is more extended flooding at Mount Field National Park picnic grounds and surrounding low lying areas. The road into the National Park may become inundated.

特大洪灾

Widespread heavy rainfall across the catchment that has a 2% chance or less of happening can cause major flooding, particularly around Westerway and the lower part of Mount Field National Park.  This level of rainfall might be for example around:

• 53mm over 6 hours
• 73mm over 12 hours
• 101 mm over 24 hours
• 132mm over 48 hours

Note the level of flooding can depend on many factors, such as how wet the catchment is beforehand.  Major flooding may also start happening in less severe rain events. Impacts can include the following.

• Several areas of the Gordon River Road will become flooded and impassable, particularly through Westerway and upstream.  The Gordon River Road intersection with Ellendale Road is likely to be flooded. Areas upstream of Westerway are likely to become isolated, particularly if the Styx River is also in flood.
• Many properties in Westerway township may become flooded, including parts of the Primary School, the shop/ service station and other local businesses. Residents would need to evacuate, most likely to New Norfolk. There may not be enough time for sandbagging.
• Many river crossings will be impassable due to flooding or become hazardous. This can isolate areas upstream. High velocity flood waters can damage bridges and wash out roadways.
• Other low-lying properties on the river side of Gordon River Road. may be flooded above floor level.  It may be necessary to evacuate some dwellings.
• There is likely to be significant crop loss and stock loss unless the stock are moved to higher ground.
• There will be some flooding of land near the river around Maydena.  Properties to the north of the river may become isolated.
• Flooding in the Tyenna River may happen at the same time as more widespread flooding in the Derwent River catchment.  This may close roads between Westerway and New Norfolk, Ouse and other townships.

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.