Stream environment zones (SEZ) are lands such as stream channels, marshes, flood plains, and meadows. These lands are naturally wet and poorly drained and are critical areas for the management and protection of water resources. SEZs provide a variety of critical services in the Tahoe Region, including water quality maintenance through nutrient cycling and sediment retention, flood attenuation, infiltration and groundwater recharge, open space, scenic and recreational enjoyment, wildlife habitat, and wildfire abatement. SEZ lands have been impacted by activities such as urban development, logging, grazing, stream, river channelization, and damming. Comprehensive regulations and policies limit development and other disturbances in SEZs and support public acquisition and restoration of these sensitive lands.