Impacts: disturbance of soil and removal of vegetation on steep soils, roads, wildfire, fine sediment in spawning grounds and compaction or impervious surfaces can impact GHAs functions and values. Key Functions GHA Functions Potential Impacts Domestic animals and wildlife damages Rate of soil erosion and associated Excessive cropland erosion Water Quality movement of sediment deposited in surface Unstable streambanks water bodies Road impacts Rate of groundwater infiltration and rate of Compaction Hydrology surface water runoff Wildfires Rate of erosion as it relates to slope and Soil Health depth Excessive cropland erosion Lack of suitable spawning habitat Rate of erosion as it relates to sediment Habitat inputs to stream and wetland aquatic Lack of rearing habitat habitats Lack of floodplain connection Frequently Flooded Areas: FFAs protect public health and safety with temporary flood water storage and conveyance and riparian habitat and other wildlife benefits. Improve water quality by filtering contaminants and recharge of groundwater. FFAs affect surface and ground water quality and hydrology (timing, magnitude of flows, and alluvial aquifer recharge), and habitat diversity. Potential Impacts: reduced floodplain vegetation and root structure, unstable streambanks, lack of shade, excessive sedimentation, chemicals and nutrients that are not filtered, and lack of suitable instream habitat can impact FFAs functions and values, Key Functions FFA Functions Potential Impacts Vegetation in FFAs holds underlying soil in Domestic animals and wildlife damages place and provides area for new sediment Lack of floodplain grasses depositions to settle out Lack of large trees and willows Water Quality Moderates water temperature by shallow Unstable streambanks groundwater infiltration and releases from Large floods unconfined aquifers of cooler groundwater back to streams, and vegetation for shade Stores and retains surface water in Compaction floodplains, reducing velocities and Impervious surfaces modifying discharge rates Hydrology Recharges groundwater that can later be returned to the stream to help maintain summer base flows Supports moisture content in soils, reduces Wildfires rate of erosion, and supports plant growth Soil Health Domestic animals and wildlife damages with organic matter inputs to soil
Impacts: disturbance of soil and removal of vegetation on steep soils, roads, wildfire, fine sediment in spawning grounds and compaction or impervious surfaces can impact GHAs functions and values. Key Functions GHA Functions Potential Impacts Water Quality Rate of soil erosion and associated movement of sediment deposited in surface water bodies Domestic animals and wildlife damages Excessive cropland erosion Unstable streambanks Road impacts Hydrology Rate of groundwater infiltration and rate of surface water runoff Compaction Soil Health Rate of erosion as it relates to slope and depth Wildfires Excessive cropland erosion Habitat Rate of erosion as it relates to sediment inputs to stream and wetland aquatic habitats Lack of suitable spawning habitat Lack of rearing habitat Lack of floodplain connection Frequently Flooded Areas: FFAs protect public health and safety with temporary flood water storage and conveyance and riparian habitat and other wildlife benefits. Improve water quality by filtering contaminants and recharge of groundwater. FFAs affect surface and ground water quality and hydrology (timing, magnitude of flows, and alluvial aquifer recharge), and habitat diversity. Potential Impacts: reduced floodplain vegetation and root structure, unstable streambanks, lack of shade, excessive sedimentation, chemicals and nutrients that are not filtered, and lack of suitable instream habitat can impact FFAs functions and values, Key Functions FFA Functions Potential Impacts Water Quality Vegetation in FFAs holds underlying soil in place and provides area for new sediment depositions to settle out Moderates water temperature by shallow groundwater infiltration and releases from unconfined aquifers of cooler groundwater back to streams, and vegetation for shade Domestic animals and wildlife damages Lack of floodplain grasses Lack of large trees and willows Unstable streambanks Large floods Hydrology Stores and retains surface water in floodplains, reducing velocities and modifying discharge rates Recharges groundwater that can later be returned to the stream to help maintain summer base flows Compaction Impervious surfaces Soil Health Supports moisture content in soils, reduces rate of erosion, and supports plant growth with organic matter inputs to soil Wildfires Domestic animals and wildlife damages
GarfieldVSP_WorkPlan_May2018.docx