Miami Beach’s battle to stem rising tides
This foundation for Miami Beach’s future is actually a complicated and expensive experiment: As much as $500 million to install 80 pumps and raise roads and seawalls across the city. A first phase appears to be working, at least for now. But just one year into a massive public works project that could take six more, it’s way too soon to say whether and for how long it can keep the staggeringly valuable real estate of an international tourist mecca dry — especially in the face of sea level rise projections that seem to only get scarier with every new analysis.
"We don’t have a playbook for this," said Betsy Wheaton, assistant building director for environment and sustainability in Miami Beach.
But in many ways, Miami Beach is writing just that — the first engineering manual for adapting South Florida’s urban landscape to rising seas. The entire southern tip of the peninsula tops climate change risk lists but Beach leaders have acted with the most urgency, waiving competitive bidding and approving contracts on an emergency basis to fast-track the work. Tidal flooding lapping at posh shops and the yards of pricey homes makes a persuasive argument that climate change isn’t only real, but a clear and present threat.
Miami Beach’s battle to stem rising tides
Rising seas is the problem
I see lots of opinion with no science to back it up. Typical flap yapping from your AGW loons.
Encroaching Tides in Miami-Dade County, Florida©
Gunther Hagleitner
Castles Built on Sand A tourist mecca teeming with high-value real estate, low-lying Miami and Miami Beach are among the places most vulnerable, globally, to sea level rise (Nicholls et al. 2008). In 2014, 14.5 million tourists visited Miami-Dade County, many for its iconic beaches (Sampson 2015). Not only are these beaches eroding and in need of repeated “renourishing,” but with rising sea levels, salt water is encroaching onto the coastline, moving through porous limestone bedrock, and raising the water table in inland areas. Sea Level rise and Tidal Flooding along the Atlantic Coast By 2045, sea level in Miami-Dade County is expected to rise about 15 inches above current levels, according to a projection based on US Army Corps of Engineers data (SFRCCC 2015). With this increase, in just 30 years’ time, floodprone locations in Miami-Dade County’s coastal communities would face roughly 380 high-tide flood events per year, and the extent of tidal floods would expand to affect new low-lying locations, including many low-income communities with limited resources for preparedness measures. The flood events that today snarl daily life in parts of the county only periodically would become widespread and, on average, a daily occurrence
. As sea levels rise, higher water levels can also increase the extent and impact of storm surge and can permanently inundate some locations. A one-foot increase in sea level is estimated to threaten up to $6.4 billion in taxable real estate in the county overall (Climate Central 2015). In the Unified Sea Level Rise Projection, developed by Miami-Dade and its neighboring counties, the Army Corps projection outlines a one-foot rise in sea level in the county by about 2040—well within the lifetime of a typical home mortgage (SFRCCC 2015). But with these stark challenges come incentive and opportunity for Miami-Dade to be a national innovator, breaking new ground on two fronts: preparing for sea level rise and reducing global warming emissions.
http://www.ucsusa.org/sites/default...dade-sea-level-rise-tidal-flooding-fact-sheetABOUT
Rising Sea Levels, Coastal Development’s Effect on Gulf Coast Wetlands
Release Date: OCTOBER 3, 2016
As coastal development along the Gulf Coast continues to expand, tidal saline wetlands could have difficulty adjusting to rising sea levels.

This illustration shows county-level barriers and opportunities for landward migration of Tidal Saline Wetlands under alternative sea-level rise scenarios. (a) Relative percent of areas available for migration. (b to d) Relative ratio of areas where migration is prevented by current urban land (b), by future urban land (c), and by levees (d). Counties with crosshatching are expected to have less than 1 km2 of area available for migration. USGS Graphic.
Tidal saline wetlands along the U.S. Gulf of Mexico coast, such as mangrove forests, salt marshes, and salt flats, face survival challenges as sea levels rise rapidly and development along coastlines continues to grow. But, a recently published U.S. Geological Survey study shows there is hope for some of these at-risk Gulf coast wetlands.
In the study, which was conducted from 2012 - 2015, the authors considered the potential for landward movement of coastal wetlands under different sea-level rise scenarios. They also considered the impact of barriers to wetland migration due to current and future urbanization and examined how existing conservation lands, such as parks and refuges, might accommodate expected landward migration.
“Tidal saline wetlands along the northern Gulf of Mexico are abundant, diverse, and vulnerable to sea-level rise,” said Nicholas Enwright, USGS researcher and lead author of the study. “Our findings provide a foundation for land managers to better ensure there is space for future wetland migration in response to sea-level rising.
Rising Sea Levels, Coastal Development’s Effect on Gulf Coast Wetlands
Ah yes, but we all know that Mr. Westwall is so much smarter than all the scientists at the USGS.