Growing Returns

Coastal states need resilience plans. Here are six essential elements.

Coastal states are turning to resilience planning to confront extreme weather and climate change. New Jersey, North Carolina and Florida have all hired chief resilience officers to oversee their states’ resilience strategies. Louisiana has been a leader in coastal resilience for more than a decade.

In 2007, in the aftermath of Hurricanes Katrina and Rita, Louisiana embarked on its first of three Coastal Master Plans – science-based and publicly-informed coastal resilience plans. With each iteration, Louisiana improved the science, enriched public engagement and increased transparency in decision-making to build plans that were unanimously approved by the state legislature three times.

Based on this experience, here are six essential elements that states should include in their coastal resilience plans: Read More »

Posted in Coasts / Tagged , , , , , , | Comments are closed

Mississippi River flooding and Hurricane Barry could have inundated New Orleans. Here are four actions we need to take before that happens again.

The Bonnet Carré Spillway will finally close this week after two separate openings totaling an unprecedented 120 days. The spillway was built to protect New Orleans and surrounding parishes from Mississippi River flooding as part of the Mississippi River and Tributaries system designed after the Great Flood of 1927.

This comes on the heels of another first when, earlier this month, Hurricane Barry was the first tropical storm to make landfall while the Mississippi River was at flood stage. This one-two punch — tropical storm combined with high river — was previously only a nightmare scenario with the potential to send storm surge upriver, overtopping levees, inundating the city and surrounding region, and shutting down globally significant commerce.

Mercifully, that scenario did not occur—Barry shifted westward, river levels never reached projected heights and rainfall diminished. However, the river remains dangerously high into the thick of hurricane season. During Hurricane Katrina, storm surge in the river increased the water level by 13 feet, but the river was so low that it wasn’t a threat. The combination hurricane-river flood scenario could play out again – and next time we may not be so lucky.

Louisiana floods in three ways: 1.) From water flowing down the Mississippi and other rivers; 2.) From storm surge and rising seas from the Gulf of Mexico; 3.) From rainfall, now increasing in intensity and overwhelming existing drainage systems. With Barry, for the first time ever, we faced all three threats at once, and climate change will only compound them.

Going forward, we must learn to live with water. On the Mississippi River specifically, the current management system no longer meets the needs of the future. Here are four strategies to help us get there:   Read More »

Posted in Coasts / Tagged , , | Read 1 Response

Repeat opening of Bonnet Carré Spillway is a sign we need to manage rivers differently

Earlier this month, the U.S. Army Corps of Engineers opened the Bonnet Carré Spillway north of New Orleans for the second time this year to relieve pressure on the Mississippi River levees and protect communities in south Louisiana from catastrophic flooding.

It was the first time in the structure’s nearly century-old existence that it had been opened twice in the same year. When the Corps opened the spillway in February, it was the first opening in back-to-back years.

Corps Maj. Gen. Richard Kaiser recognized this unprecedented occurrence in response to the wettest period in 124 years, saying, “This is not business as usual.” What was designed as an emergency flood control system has increasingly become a default safety valve, as climate change and increased precipitation throughout the Mississippi River Valley only further stress the system.

This is a sign that we need to re-think how we manage our rivers and revisit operations of a system designed nearly a century ago. Read More »

Posted in Coasts / Tagged , , | Read 3 Responses

How can we reduce losses from coastal storms? Monitor the health of our coasts.

With a rapidly changing climate and more frequent extreme events like floods and droughts, comprehensive environmental monitoring will be increasingly important for coastal planners, farmers and others invested in natural resource management.

Monitoring efforts can cover the whole spectrum of environmental and socioeconomic concerns to provide a holistic picture of ecosystem health over the short- and long-term. This can help to inform future decisions and planning based on the most recent conditions and trends.

However, it can be difficult to coordinate monitoring efforts across political boundaries and agencies, and monitoring is expensive to maintain over time.

Luckily, Louisiana is already a world leader in utilizing collaborative monitoring data to inform coastal restoration and planning efforts. Read More »

Posted in Coasts, ecosystems / Tagged , , , , , , , , , , , , , | Read 1 Response

Climate change will force us to make tough decisions. Adaptive management can help.

In the face of climate change, it can be difficult to balance environmental, economic and community needs, but it’s a challenge we must overcome to adapt, survive and thrive.

To do this, professionals from multiple sectors across the globe are increasingly incorporating adaptive management techniques into resource planning for all kinds of essential ecosystems – from major watersheds like the Mississippi River Delta to high food production regions like the Corn Belt.

The lessons learned from past management decisions in these places will help shape resilience strategies for communities and industries around the world as they prepare for a new normal. Read More »

Posted in Coasts, ecosystems / Tagged , , , , , , , , , , , | Read 2 Responses

What the world can learn from Louisiana about living with climate change

Louisiana is emerging as a global leader in how to sustainably plan for the future in the face of increased storms, coastal erosion and rising seas. By combining nature-based solutions with traditional flood protection measures, Louisiana is a proving ground for living with climate change.

The lessons Louisiana can teach are not new, but they build upon those first taught by the Dutch. The Netherlands has taught the world innumerable lessons in flood protection – but historically, the Dutch have been primarily focused on building walls to keep water out, rather than finding more sustainable ways to protect coastal communities.

That is until recently, when the Dutch began embracing a more nature-based approach of “living with water,” similar to what is happening in Louisiana.

We can change the way we face coastal flooding challenges if we blend coastal restoration, protection and community resiliency measures. Louisiana’s multiple-lines-of-defense approach is a model for other coastal places, including the Netherlands, that are planning their futures in the face of climate change. Read More »

Posted in Coasts / Tagged , , , , , , , , , , , , , , , , , | Comments are closed