Define "subsidence" in the context of coastal environments.

In the context of coastal environments, subsidence refers to the gradual sinking of land that can occur over time due to a variety of factors, including both natural processes and human activities. This phenomenon is particularly significant in areas like coastal Louisiana, where the landscape is constantly changing due to sediment dynamics, groundwater extraction, and the influence of sea-level rise.

As the land sinks, it can lead to increased vulnerability to flooding and erosion, which directly impacts the ecosystems, infrastructure, and communities located in these coastal regions. Factors contributing to subsidence may include the compaction of sediments, the depletion of groundwater resources, or the natural settling of organic materials in marshlands. Understanding subsidence is crucial for effective coastal management and planning, especially in regions experiencing rapid environmental change.