Water, Coasts and Ice

Water levels in the Great Lakes are fluctuating in ways that we have not seen in the past, with both historically low- and high-water levels occurring in the last decade. Expectations are that larger and more frequent water-level fluctuations will occur in response to climate change. The increased variability in lake levels has implications for the management of invasive plants found in...

The Bonnet Carré spillway (BCS) is a flood-control structure along the Lower Mississippi River designed to prevent flooding in the city of New Orleans by diverting excess water into the nearby Lake Pontchartrain estuary. Alarmingly, the BCS was opened as many times over the past decade (2011–2020) as it had been over the six prior decades combined (1951–2010), with devastating effects on...

The Gulf of America coast of Louisiana and Texas faces threats from increasingly destructive extreme weather, heat, subsidence, and coastal erosion. Inland areas also face stronger storms, floods, and shifts in land development patterns. Increasing drought and extreme heat in Texas and New Mexico also exacerbate fires and floods. All of these regions are culturally rich, rapidly changing...

Inland fisheries have tremendous cultural, economic, and subsistence value. However, climate change brings new stresses to land-locked fisheries that raise novel challenges for resource managers. One fundamental challenge in inland fisheries is how to best assess and manage data-limited fisheries when resources are finite and uncertainty is pervasive. To address this challenge, we will...

Many inland bodies of water in western Louisiana are receiving too much sediment and nutrient pollution from upstream which has caused declines in the health of many fisheries. These bodies of water include many traditional lake-based fisheries of the Chitimacha Tribe of Louisiana (CTL), and fisheries used by visitors, providing critical tourism and economic development dollars to the...

Managing water resources in arid regions is increasingly important in the face of more frequent droughts and desertification that is occurring with climate change. These challenges of climate change intersect with potential environmental contamination from naturally occurring sources and legacy human activity (such as mining) and create a need for sustainable land and water management...

Stretching almost 1,900 miles from Colorado to the Gulf of America, the Rio Grande/Río Bravo Basin (RGB) supplies drinking water for more than 6 million people and irrigation for about 2 million acres of land. The river also supports habitat for many at-risk and endangered species. Because of its size and diverse ecosystem services, the RGB faces complex shared-management challenges that...

Project Overview Streams in Southeast Alaska are changing rapidly due to climate change. Warmer temperatures are bringing more rain, less snow, and causing glaciers to retreat, all of which affects stream flow and food sources for young salmon. Researchers supported by this Alaska CASC project will study whether juvenile salmon can adapt by moving between different types of streams...

Palau’s Jellyfish Lake, locally known as Ongeim’l Tketau (OTM), is an iconic tourism site and an important area of biodiversity. This landlocked marine lake is part of the Rock Island Southern Lagoon UNESCO World Heritage Site, representing an expression of Palauan national pride, and has brought in millions of dollars to the local Koror State economy. OTM is also home to the unique...

Cold-water fish species such as trout and salmon are highly valued components of many stream ecosystems in Michigan and the Great Lakes region and are sensitive to rising stream temperatures. For example, the timing of spawning and development rates of these species are affected by stream temperature from late fall through spring. Historically, stream temperature modeling has focused on...

The complex mountain and valley chains of the Southwest exert a strong influence on precipitation and wind patterns. Atmospheric rivers deliver some of the most extreme precipitation events to west-southwest-facing slopes of the mountains where strong gusty downslope winds can also spread wildfires. Climate change is making the southwest warmer and dryer resulting in more fire-prone...

Loko iʻa, Hawaiian fishponds, are part of a rich history of indigenous aquaculture dating back to the 1400s. These unique ecosystems serve as key models of food sustainability across Hawaiʻi and the Pacific region. Hawaiʻi, among the most geographically isolated regions throughout the world, currently faces many challenges including environmental uncertainties, increasing urbanization, a...