Coastal Inundation, riverine and direct rainfall flooding information for communities on Acton Creek, other minor waterways, and the coasts of Frederick Henry Bay and Ralphs Bay

Draft version 0.1 September 2025 for community input – email ses@ses.tas.gov.au

若要更詳細地查看地圖，, 查看塔斯馬尼亞策略性洪水圖.

Understand your flood risk and get ready

In a major flood, this area could be widely affected by

• direct rainfall flooding (flash flooding) or
• flooding from the ocean (coastal inundation).

Flooding from rivers and waterways (riverine flooding) would only impact parts of

• Acton Park, and
• Seven Mile Beach around Acton Creek.

The coastline of this area may be affected by

• high tides
• waves from storms, and
• erosion.

This could happen during heavy rain and add to other flooding.

Houses along Acton Creek and between the golf course and Seven Mile Beach Rd are at risk of flooding. The corner of Seven Mile Beach Road and Estate Drive may flood from direct rainfall. Other areas at risk of direct rainfall flooding include

• large parts of Roches Beach
• properties south of Ringwood Rd and Mannata St
• other low-lying streets in Lauderdale and International Close in Acton Park.

The maps in this guide show the level of flooding that has a 1% chance of happening any year from both rivers and direct rainfall flooding (known as 1% annual exceedance probability, or AEP). You are likely to experience flooding such as that shown in the maps in your lifetime. Tasmanians need to prepare for flood events that may not happen often, as well as the minor flooding they may have experienced.

Clarence City Council has flood mapping across this area that includes the modelled effects of climate change. You can see it online at www.ccc.tas.gov.au/living/your-neighbourhood/flooding/.

Even if your home is not at risk of flooding, you should prepare for isolation plus potential power and telecommunications outages. Depending on where the rain falls and how heavy it is, local and major roads may be impassable. For example, Seven Mile Beach Road may be flooded by Acton Creek, and Acton Road may see flash flooding. Travel in the area is likely to 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.

您有洪水風險嗎？

The most serious flood in recent history was in June of 1974. June of 2011 also saw serious flooding in this area. Damaging storms and tides have also been recorded. In July 2011 tides and winds caused flooding and damage in Lauderdale and Roches Beach. This kind of weather may be more common in the future due to increased average temperatures.

我應該做什麼？

• 檢查地圖，看看您的住宅或企業是否可能遭受洪水侵襲。.
• 評估您的住家或公司，並做好準備以盡量減少潛在的洪水損害。.
• 檢查您是否能在洪水期間安全地抵達家中、工作地點或學校。.
• Prepare a Home Emergency Plan. See 為緊急情況做好準備 – A guide for individuals and households to prepare for emergencies . 
• 如果你可能被隔離且必須取得服務，你可能需要提早撤離。.

像圖中所示的洪水，或更糟的洪水，將會再次發生。沒有兩次洪水是完全一樣的。.

如果您居住在低窪地區或靠近水道，您的房屋可能會被淹沒。即使您的住所安全，您也可能需要繞過淹水地區，或者您的道路通行可能會被阻斷。切勿駕車進入或身處洪水之中。道路和橋樑可能會被沖毀或不安全。洪水期間請避免出行。.

知道該怎麼做可以拯救你的生命並保護你的財產。制定家庭緊急計畫是最好的準備方法之一。決定天氣和降雨的觸發條件，以便採取行動。.

Please Note

The maps in this plan show data from the Tasmanian Strategic Flood Mapping (TSFM) project. You can explore this data with the Flood Hazard Data layers on www.thelist.tas.gov.au. Clarence City Council has detailed flood studies for these areas, see www.ccc.tas.gov.au/living/your neighbourhood/flooding/. CCC data includes climate change projections, shows flooding at more shallow depths and therefore the flood extents are considerably different and generally larger, than the TSFM extents shown in the maps below. This data is based on rainfall averages from the past.

中央氣象局預報、警報與觀測

本局發佈 洪水警报、恶劣天气警报和/或雷暴警报，可能因强降雨引发山洪暴发 每當 大雨 可能會在某個區域出現。從發布預警到豪雨發生的時間，可能從一小時到二十四小時不等。.

There are no formal flood warning levels for waterways in this area.

雨量觀測 at Hobart Airport, Hobart, Clifton Beach and other nearby rain gauges 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.

這 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.

了解警告和關鍵資訊

隨時留意周遭狀況。定期查看天氣預報、觀測數據和警報。.

• TasALERT.com
• 您當地的 ABC 電台 或
• 這 氣象局 網站.

	建議 (黃色)： 已發生事件。目前沒有立即危險。請隨時更新最新情況，以防局勢變動。.
	觀察與行動（橘色）： 威脅等級升高。情勢正在改變，您現在就必須採取行動保護您和您的家人。
	緊急警告（紅色）： 緊急警報為最高級別的警報。您可能身處危險之中，需要立即採取行動。任何延誤都可能危及您的生命。.
	社群更新（藍色）： 針對特定事件或事故，向受影響社群提供的具體資訊和最新消息。.
	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 publishes information including the type and location of incident.

更多資訊請參閱 www.ses.tas.gov.au/warnings/ .

洪水水位

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. Tide levels are also important, as they affect:

• ocean waves
• coastal erosion
• groundwater level, and
• drainage through the stormwater system.

小範圍淹水

A minor flood can inundate low lying streets, parkland, gardens, orchards and paddocks.  Vehicles, livestock and equipment should be moved.  There may also be flooding across some minor roads. Paddocks north of Acton and the Royal Hobart Golf Course in Lauderdale may flood in parts.

中度洪水

There is more extensive flooding of agricultural land and some buildings may be impacted to above floor height. Properties may be isolated for a few hours as minor roads become flooded. Roads at most risk in moderate flooding include:

• International Close, in Acton Park
• Seven Mile Beach Road, Lewis Avenue, Regal Court and Seabrook Street in Seven Mile Beach.

Some properties in these streets may flood but it is unlikely to be above house floor height.

嚴重洪水

There is at least a 2% chance in any year of major flooding in this area.

This level of flooding could be a result of about 55-60mm of rain over 6 hours at the Hobart Airport, for example.

Major flooding will impact many streets and may flood houses. Acton Creek could flood parts of Acton Park and Seven Mile Beach, including

• International Close
• Seven Mile Beach Road
• Coastal Drive
• Lewis Avenue
• Seabrook Street, and
• Regal Court.

Depending on where and when the rain falls, flash flooding could impact many areas, including

• In Acton Park
  • Acton Road
  • Estate Drive
  • International Close
  • properties near Upton Creek and other low-lying streets and houses.

• In Seven Mile Beach, properties on Vivalanett Close and Seven Mile Beach Road
• Possible widespread impacts in Roches Beach
• Terrina Street in the north of Lauderdale

Also at risk are low-lying properties throughout Lauderdale, including on

• Mannata Street
• North Terrace, and
• Bayview Road.

During a major flood, the tide and ocean swell will influence flooding in this area. High tides raise the water table and slow or prevent stormwater drainage, increasing flooding. Waves and high tides can

• cause damage and erosion and
• change the way floodwater moves through this area.

These effects are difficult to predict and are not included on the maps in this plan.

了解你的風險，做好準備，盡可能降低風險，與他人聯繫，保持警惕並安全行動。.

洪水之前

1. 認識你的風險

塔斯馬尼亞經常發生洪水，可能造成廣泛且嚴重的損害。在過去 200 年裡，塔斯馬尼亞有 78 人死於與洪水相關的事件。本指南旨在幫助您了解您所在地區的洪水風險。.

2. 準備您的家戶

制定包含風暴和洪水應變計畫

思考一下在風暴或洪水來襲時你會怎麼做，意味著你準備得更充分，每個人都會更安全。制定一個家庭中的每個人都理解的緊急計畫。有檢查表可以幫助你思考你的計畫——請參閱 為緊急情況做好準備 – 為個人和家庭準備應急措施的指南。. 
定期檢查您的計劃，並讓家中的每個人都設想一次可能影響您家的洪水情況來進行測試。.

準備一個緊急救生包

定期測試收音機和手電筒的電池。.

3. 在可能的情況下，降低您遭受洪水侵襲的風險

• 在購買、維護或開發房地產時，請考慮風暴、洪水和其他災害。.
• 修剪或移除您家中、商家或您家附近有電力線的樹木和樹枝。.
• 保持您的排水溝和排水管暢通。.

4. 與他人建立聯繫

認識你的鄰居並參與你的社區。一個緊密的社區，在緊急情況下更安全、更有韌性，並有助於每個人在事後更好地恢復。檢查家人和鄰居是否安全，並了解正在發生的事情。.

期間

5. Keep up to date

隨時留意周遭狀況。定期查看天氣預報、觀測數據和警報。. 

• 塔斯警報 
• 您當地的 ABC 電台 或
• 這 氣象局 網站.

6. Act Safe

• 監督兒童.
• 為可能的停電、停水或斷網做好準備。.
• 檢查您的緊急救助包是否已準備就緒。.
• 切勿靠近淹水區域，例如排水溝。. 永不 在洪水中有行走、玩耍、骑行或开车。你無法確定水下有什麼，或水有多深、流速有多快。20公分的湍急的洪水就很容易將人沖走並淹死。洪水可能很危險。.

您的房屋可能發生淹水時

• 將家居物品放在高處，以盡量減少潛在損壞。.
• 如果安全的話，請關閉水電和瓦斯。. 
• 一種防止污水倒灌回屋內的好方法是將沙包放入塑膠袋中，然後用它們來堵塞馬桶、蓋住排水孔和水槽。.
• 趁你還能安全脫困時趕快離開。.

如果你需要疏散

• 請遵循 SES / 塔斯馬尼亞警方的建議。.  
• 帶上你的緊急求生包。. 
• 前往朋友或家人較安全的地方，或前往疏散中心。. 
• 讓別人知道你去了哪裡。.

照顧好你的動物

在緊急情況下，您有責任照顧您的動物。如果您有寵物和其他動物，在洪水或其他緊急情況下，疏散的時間會更長。在洪水可能上漲之前，請及時將牲畜移離易受洪水影響的地區。更多資訊請參閱

• RSPCA 應對緊急情況動物的指南
• Huon Valley Council’s advice on preparing an emergency pet plan
• 這 主要生產者農場洪水準備工具箱.

請避免在風暴期間和風暴之後旅行

• 不要去觀光。觀光客會延誤緊急服務並造成事故。.
• 注意危險，例如
  • 路面积水
  • 損壞的電力線
  • 山崩
  • 損壞的道路
  • 倒下的樹木或屋頂鐵片。.
• 切勿駕車通過淹水區域。洪水中的大多數死亡和救援事件都與駕車通過淹水區域有關。.
• 緩慢行駛，並在不受洪水影響的道路上打開頭燈。.

之後

• 請持續收聽 ABC 地方電台的最新消息、道路重新開放、社區會議等資訊。.
• 如果您離開家，請勿在聯邦緊急事務局 (SES) 或塔斯馬尼亞警方告知您安全之前回家。.
• 注意道路上的危險，例如路面上的泥沙或碎屑、道路/橋樑損壞以及正在進行清理和修復工作的工人。.

如果您的房屋已受損

• 在檢查損壞時，請待在地面。小心掉落的樹木、碎玻璃、鬆動的屋頂或其它危險物品。.
• 穿著堅固的靴子、手套和防護服。. 
• 請使用手電筒，切勿在受洪水影響的建築物內使用火柴或蠟燭。. 
• 將所有飲用水煮沸，直到被告知自來水再次安全為止。.
• Do not turn on electricity or gas until it is tested by a licensed electrician or gas fitter for safety.
• 如果您的房屋受損，需要暫時住在其他地方，請攜帶您的緊急應變包和寵物一同前往。
• 如安全，請拍攝任何損壞的照片，並聯繫您的保險公司。.
• 監督兒童.
• 檢查鄰居是否安好。.

如需更多資訊，請前往 www.ses.tas.gov.au .

免責聲明

The information in this guide is current at the date of publication. While every effort has been taken to ensure the validity and accuracy of the data presented, the State Emergency Service does not take responsibility for data error or omission. Please see the standard Tasmanian Government’s Copyright and Disclaimer Statement for more details https://www.tas.gov.au/codi .

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.

保持獲取最新資訊及更多詳盡資料

Current warnings (TasAlerts)                     TasALERT.com

氣象局 (BoM)                   bom.gov.au/tas/warnings

Emergency Broadcasters                           ABC 936AM

TASSES 社交媒體 facebook.com/sestasmania

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

Clarence City Council                                 ccc.tas.gov.au clarence@ccc.tas.gov.au  6217 9500

國家接力服務 (NRS) relayservice.gov.au