| Natural Processes |
| Agent |
Examples |
| Erosion |
waves and currents
storms
landslides |
| Sediment Reduction |
climate change
stream avulsion
source depletion |
| Submergence |
land subsidence
sea-level rise |
| Wetland Deterioration |
herbivory
freezes
fires
saltwater intrusion |
| Human Activities |
| Agent |
Examples |
| Transportation |
boat wakes, altered water circulation |
| Coastal Construction |
sediment deprivation (bluff retention)
coastal structures (jetties, groins, seawalls) |
| River Modification |
control and diversion (dams, levees) |
| Fluid Extraction |
water, oil, gas, sulfur |
| Climate Alteration |
global warming and ocean expansion
increased frequency and intensity of storms |
| Excavation |
dredging (canal, pipelines, drainage)
mineral extraction (sand, shell, heavy mins.) |
| Wetland Destruction |
pollutant discharge
traffic
failed reclamation
burning |
