Hobart Guide to Flood Preparation for Farmers
Hobart Guide to Flood Preparation for Farmers
Tasmania’s rich agricultural sector, with Hobart as a central hub and gateway, is intrinsically linked to its natural environment. While the island state is renowned for its pristine landscapes, it also faces the reality of extreme weather events, including significant rainfall leading to flooding. Farmers in the greater Hobart region and surrounding agricultural areas must be acutely prepared to protect their land, livestock, infrastructure, and livelihoods from the devastating impacts of floods.
Historical weather records from the Bureau of Meteorology (BOM) highlight periods of intense rainfall and subsequent flooding that have affected Tasmania. For instance, major flood events in 1929, 1960, and more recently, the significant rainfall in 2016 which impacted the Derwent Valley and surrounding agricultural lands, serve as critical learning opportunities. These events underscore the need for robust, forward-thinking flood preparation strategies tailored to the unique challenges faced by farmers.
Understanding Flood Risks in the Hobart Agricultural Region
The agricultural lands surrounding Hobart, particularly those in the Derwent Valley, the Huon Valley, and along the coastal plains, are susceptible to different types of flooding. These can include riverine flooding from overflows of the Derwent River and its tributaries, flash flooding from intense local rainfall, and coastal inundation in low-lying areas.
Identifying Vulnerable Areas on Your Farm
A critical first step for any farmer is to conduct a thorough risk assessment of their own property. This involves:
- Mapping Flood-Prone Zones: Consult local council flood maps and BOM resources to identify areas on your farm that have historically been or are likely to be inundated. Pay close attention to low-lying paddocks, areas near rivers or creeks, and drainage lines.
- Assessing Infrastructure: Identify critical farm infrastructure such as sheds, barns, silos, irrigation systems, and residences that are located in or near identified flood-prone zones.
- Livestock Shelters: Determine the safety and accessibility of shelters for livestock during flood events.
Understanding the specific topographical features of your farm is key. Areas that naturally channel water, even if they appear dry most of the time, can become hazardous during heavy rainfall.
Protecting Livestock and Crops
The immediate impact of flooding on a farm can be catastrophic for both livestock and crops. Proactive measures are essential to minimize losses.
Livestock Management and Relocation
Livestock are particularly vulnerable and require careful planning for their safety:
- High Ground Identification: Designate and prepare safe, elevated areas on the farm for livestock to retreat to. Ensure these areas are accessible and have adequate fencing to contain animals.
- Emergency Feed and Water: Stockpile emergency feed and water supplies in elevated locations, away from potential floodwaters, for use if animals are stranded or access to normal supplies is cut off.
- Early Relocation: Develop a plan for the early relocation of livestock to higher ground or off-farm if severe weather warnings are issued and significant flooding is anticipated. This may involve coordinating with neighbours or transport providers.
- Animal Health Monitoring: Be prepared to monitor livestock closely for signs of stress, injury, or disease following a flood event.
Crop Protection and Recovery
While crops cannot be moved, strategies can mitigate damage and aid recovery:
- Drainage Enhancement: Ensure farm drainage systems, including ditches and culverts, are clear of debris to facilitate rapid water runoff. Consider installing or improving drainage in persistently waterlogged areas.
- Crop Selection: For future planting, consider selecting crop varieties that are more tolerant to waterlogging or have shorter growing cycles if your area is prone to late-season rains.
- Soil Health: Maintaining good soil health through practices like cover cropping can improve soil structure and drainage, making land more resilient to water saturation.
- Post-Flood Assessment: Following a flood, assess crop damage carefully. Some crops may recover, while others may need to be replanted. Document all losses for insurance purposes.
Infrastructure Resilience and Protection
Farm infrastructure represents significant capital investment and is vital for day-to-day operations. Protecting these assets is a priority.
Securing Buildings and Equipment
Sheds, workshops, machinery, and storage facilities are often located in areas that can be affected by flooding.
- Elevate Storage: Store valuable equipment, chemicals, and feed on elevated platforms or shelving well above potential flood levels.
- Flood-Proofing Measures: For critical buildings, consider implementing flood-proofing measures such as reinforcing foundations, installing flood doors, or raising electrical components and critical machinery.
- Machinery Relocation: If a flood warning is issued, move tractors, harvesters, and other valuable machinery to higher ground well in advance.
- Chemical and Fuel Storage: Ensure all hazardous materials, including chemicals and fuel, are stored in secure, bunded areas that will not be compromised by floodwaters, preventing environmental contamination.
Protecting Irrigation and Water Systems
Water management systems are crucial for agricultural productivity and can be severely damaged by floods.
- Secure Pumping Stations: If pumps are located in low-lying areas, consider temporary relocation or protective measures like sandbagging.
- Anchor Movable Equipment: Secure any movable irrigation equipment, such as portable pumps or sprinklers, to prevent them from being washed away.
- Check for Damage: After a flood, thoroughly inspect all irrigation lines, pipes, and water storage tanks for damage before resuming operation.
Emergency Planning and Communication
A well-rehearsed emergency plan and clear communication channels are the backbone of effective flood preparation for farmers.
Developing Your Farm Flood Plan
Every farm should have a documented flood preparedness plan:
- Identify Risks: Detail the specific flood risks for your farm, including historical data and potential impact zones.
- Action Checklists: Create clear checklists for actions to be taken before, during, and after a flood event, covering livestock, crops, infrastructure, and personal safety.
- Evacuation Routes: Plan safe evacuation routes for both people and livestock, and identify alternative locations if on-farm relocation is not feasible.
- Contact Information: Maintain an up-to-date list of emergency contacts, including:
- Emergency Services: SES (State Emergency Service), Police, Fire Brigade.
- Local Council: For information on local conditions and support.
- Veterinarians: For livestock health emergencies.
- Insurance Providers: For claims processing.
- Neighbours: For mutual assistance and information sharing.
- Utility Providers: For power, water, and telecommunications.
Staying Informed and Communicating
Timely information is critical for making informed decisions:
- Monitor BOM Warnings: Regularly check the BOM website and app for weather forecasts and flood warnings specific to the Hobart region and your farm’s location.
- Utilize SES Alerts: Subscribe to any local SES alert systems or community warning networks.
- Establish Farm Communication: Ensure all farm workers are aware of the emergency plan and communication procedures. Designate a central point of contact for information dissemination.
By taking these comprehensive steps, farmers in the Hobart region can build resilience against the challenges posed by heavy rainfall and flooding, safeguarding their valuable assets and ensuring the continued productivity of their operations. Preparedness is not just about reacting to a disaster; it’s about proactively building a stronger, more secure future.
