FUNCTIONALITY of LENTIC SYSTEMS LENTIC STANDING WATER HABITAT

FUNCTIONALITY of LENTIC SYSTEMS

LENTIC STANDING WATER HABITAT SUCH AS LAKES, PONDS, SEEPS, BOGS and MEADOWS

Lentic PFC definition § “Lentic riparian-wetland areas function properly when adequate Vegetation, Landform or large Woody Debris is present to: § Dissipate energies associated with wind action, wave action, and overland flow from adjacent sites, thereby reducing erosion and improving water quality

Lentic PFC definition § Filter sediment and aid floodplain development § Improve flood-water retention and ground water recharge, § Develop root masses that stabilize islands and shoreline features against cutting action. § Restrict water percolation

Lentic PFC definition § Develop diverse ponding characteristics to provide the habitat and the water depth, duration, and temperature necessary for fish production, waterfowl breeding and other uses § Support greater Biodiversity

APPROCH § Base assessment on Potential and Capability. § For example, if the system does not have wave energy, logs, or shoreline rocks, do not use that criteria § ID Team (e. g. If soils too oxygenated or saline for redoximorphic features, don’t expect them) § Understand, flow patterns, sediment transport and vegetation composition

Hydrogeomorphic: • • • Groundwater recharge and discharge Flood modification Inundation (depth, duration, & frequency) Aquatard Shoreline shape

Water at or near the land surface

Vegetation • • • Community types – distribution Density and cover Community dynamics and succession Recruitment and reproduction Root characteristics Survival

• • • Soils Soil type Distribution of aerobic anaerobic soils Annual pattern of soil water states Ponding frequency and duration Restrictive material

Erosion/Deposition: • • Shoreline stability Depositional features

Water Quality • • Temperature p. H Dissolved solids Dissolved oxygen

Biotic community: • Aquatic plants • Recruitment/reproduction • Nutrient use

Structures • Design stability • Materials • Overflow channels