Florida’s hurricane season begins on June 1 and ends November 30. Based on historical weather records dating back to the 1950s, a typical season will average 12 tropical storms with sustained winds of at least 39 miles per hour, of which six may turn into hurricanes with winds of 74 miles per hour or more. In addition to high winds, hurricanes and tropical storms can bring torrential rainfall and localized flooding.
Localized flooding from these types of severe weather events can be exacerbated because of improperly maintained drainage systems. Residential communities and businesses can help mitigate the impacts from severe storms. One of the most important steps is the regular inspection and maintenance of drainage infrastructure. Drainage infrastructure can include inlets, discharge control structures, connecting pipes and ponds. Proper maintenance of these facilities will ensure unobstructed flow of stormwater and fully operational equipment.
Additionally, residential communities and businesses with operable discharge control structures can request authorization from the Lake Worth Drainage District (LWDD) to open these structures prior to the storm. Lowering pond levels prior to the rain event provides additional storage in ponds for excess stormwater. The LWDD recommends establishing a Drainage Committee whose role is to provide for the maintenance and operation of the community or business’s drainage system. Drainage Committees may consist of board members, residents and/or property managers. All members of the Drainage Committee should register with the LWDD on its website at www.lwdd.net/storm-response. This registration process ensures the LWDD knows who to contact and where to send important weather alerts and instructions.
During the storm, LWDD personnel will monitor canal elevations and make operational adjustments to major flood control structures as needed. Depending on the volume and duration of rainfall, expect streets, sidewalks, driveways and lawns to flood. These areas are designed to function as secondary detention areas and help to keep water away from homes and businesses. This flooding is temporary and will begin to recede after an event has passed. However, always follow emergency management instructions if told to evacuate.
It may be tempting to explore outside, for your safety and to keep roadways clear for emergency response vehicles, stay indoors until told otherwise by authorities. Do not try to walk in flooded areas. Flood water may be unsanitary and there may be downed power lines or other hazards that are not visible. Do not try to drive through flooded areas. Vehicles can become unstable and float in just inches of water. Additionally, canal banks may fail, and roadways may be impacted by sinkholes. The location of roads and sidewalks may not be discernible from canals due to the sheeting effect of flood water and life-threatening accidents can occur.
No system, no matter how well designed, is 100% flood proof but collaborating with communities, businesses and other water management agencies, LWDD can help keep you and your property safe from potential flooding.
Your Flood Probability
/in Flood Control, News, ResidentialWithin the Lake Worth Drainage District (LWDD) boundary, some homes and businesses are constructed in areas known as the 1 in 100-year flood plain but have experienced multiple floods in the same year. The assumption that if their area has experienced a 1 in 100-year flood, then for the next 99 years they do not have to worry about flooding is not correct. While it is unlikely that two large storms will happen in close succession, history has demonstrated that it is possible.
Confused by the term 1 in 100-year flood, people begin to wonder what their flood risk really is. The definition of a 1 in 100-year flood is a flood that has a 1% chance of occurring in any given year. Understanding your flood risk can be a complex process, but the hydrologists at the U.S. Geological Survey (USGS) are striving to communicate risk more effectively, in part by transitioning away from the term 1 in 100-year flood and instead referencing multiple year flooding probabilities. For example, the flooding risk of a home in the 1 in 100-year floodplain can be more easily understood as a home with a 26% chance it will flood over the course of a 30-year mortgage. Providing a clearer understanding of the probability of flood risk allows for better protection of people and buildings.
The USGS has published a flyer discussing in detail the probability of flood risk. You can download a copy at https://pubs.usgs.gov/gip/106/pdf/100-year-flood-handout-042610.pdf
Hurricane Season Is Here
/in Hurricanes, NewsFlorida’s hurricane season begins on June 1 and ends November 30. Based on historical weather records dating back to the 1950s, a typical season will average 12 tropical storms with sustained winds of at least 39 miles per hour, of which six may turn into hurricanes with winds of 74 miles per hour or more. In addition to high winds, hurricanes and tropical storms can bring torrential rainfall and localized flooding.
Localized flooding from these types of severe weather events can be exacerbated because of improperly maintained drainage systems. Residential communities and businesses can help mitigate the impacts from severe storms. One of the most important steps is the regular inspection and maintenance of drainage infrastructure. Drainage infrastructure can include inlets, discharge control structures, connecting pipes and ponds. Proper maintenance of these facilities will ensure unobstructed flow of stormwater and fully operational equipment.
Additionally, residential communities and businesses with operable discharge control structures can request authorization from the Lake Worth Drainage District (LWDD) to open these structures prior to the storm. Lowering pond levels prior to the rain event provides additional storage in ponds for excess stormwater. The LWDD recommends establishing a Drainage Committee whose role is to provide for the maintenance and operation of the community or business’s drainage system. Drainage Committees may consist of board members, residents and/or property managers. All members of the Drainage Committee should register with the LWDD on its website at www.lwdd.net/storm-response. This registration process ensures the LWDD knows who to contact and where to send important weather alerts and instructions.
During the storm, LWDD personnel will monitor canal elevations and make operational adjustments to major flood control structures as needed. Depending on the volume and duration of rainfall, expect streets, sidewalks, driveways and lawns to flood. These areas are designed to function as secondary detention areas and help to keep water away from homes and businesses. This flooding is temporary and will begin to recede after an event has passed. However, always follow emergency management instructions if told to evacuate.
It may be tempting to explore outside, for your safety and to keep roadways clear for emergency response vehicles, stay indoors until told otherwise by authorities. Do not try to walk in flooded areas. Flood water may be unsanitary and there may be downed power lines or other hazards that are not visible. Do not try to drive through flooded areas. Vehicles can become unstable and float in just inches of water. Additionally, canal banks may fail, and roadways may be impacted by sinkholes. The location of roads and sidewalks may not be discernible from canals due to the sheeting effect of flood water and life-threatening accidents can occur.
No system, no matter how well designed, is 100% flood proof but collaborating with communities, businesses and other water management agencies, LWDD can help keep you and your property safe from potential flooding.
Post-Storm Debris Removal: What You Can Expect
/in Hurricanes, NewsFollowing a severe storm event, the Lake Worth Drainage District (LWDD) conducts immediate post-storm assessments, inspecting water control structures, canal channels and the canal rights-of-way for vegetative debris with the potential to negatively impact drainage.
The public can assist via our Citizen Damage Reporting System located on our website at https://www.lwdd.net/storm-response. The user will be asked a few questions and a map will be provided to help identify the location of the incident. These public reports as well as LWDD staff assessments are reviewed and prioritized for vegetation removal. Priority is based on the following criteria:
Depending on the severity of the storm damage it may take several weeks before crews can address low priority incidents. Private property owners that wish to trim vegetation that has fallen or is leaning on their property from the LWDD right-of-way may do so at their discretion and expense. If access to the LWDD right-of-way is necessary to trim or remove vegetation, the property owner should receive prior approval from the LWDD for temporary access.
Any material from trimming or tree removal by the property owner must be properly disposed of by the resident or if applicable the contractor performing the work. Keep in mind that it is unlawful to place any debris in the canal or on the right-of-way in anticipation that LWDD will remove the material. Unlawful dumping will be reported to the authorities.
If fallen debris has damaged personal property, the individual property owner should contact their insurance company to submit a claim. The LWDD will not directly reimburse property owners for damage caused by acts of mother nature.
After a major storm event, debris clean-up is paramount to getting back to normal and the LWDD is committed to quick removal of hazardous flood prone debris for the safety of our residents.
That’s A Good Question
/in Hurricanes, News, O & MWhat are LWDD’s contingency plans for canal maintenance projects that are underway during hurricane season?
The Lake Worth Drainage District is always mindful of the potential effects of severe storms on project sites. Staff regularly monitor weather conditions for potential impacts. Each storm is unique, and the required preparation will be determined depending on the specific weather prediction and status of the project site.
Automation For Faster Response
/in Flood Control, NewsSouth Florida’s tropical weather events can be intense and seriously threaten property and life. In response, the Lake Worth Drainage District (LWDD) monitors canal elevations and makes necessary operational adjustments to its water control structures to provide flood control for the 200 square miles of land within its boundary.
Water control structures act like dams, allowing stormwater to be released or held back depending on weather conditions. The technology used to operate LWDD’s water control structures is called Supervisory Control and Data Acquisition (SCADA). As the water rises in the canal and reaches a pre-determined elevation, SCADA will slowly open control structures releasing water for flood control. Similarly, as water elevations return to normal levels the control structure gates will close, holding back water for conservation and water supply demands.
This response to changes in the canal system happens automatically and can be monitored remotely by staff using mobile devices. However, in anticipation of severe weather, staff can override the automated SCADA system and make manual adjustments as needed. The remote monitoring and operating functions of SCADA eliminates the need for LWDD staff to venture out during dangerous weather conditions to operate control structures, as well as significantly reduces response time.
Another advantage to SCADA is the capture of operational data by the system which can be used to evaluate future water supply needs and historical flood control responses. This data can be shared with regional water management partners for enhanced flood control coordination and water conservation measures.
LWDD is proud to provide the residents and businesses within our boundary this advanced flood control technology.