Qualitative Habitat Evaluation Index Bradley Hansen John Nieber Department of Bioproducts and Biosystems Engineering For BBE 4535/5535 Fall 2011
Qualitative Habitat Evaluation Index (QHEI) Qualitative Habitat Evaluation Index (QHEI) The QHEI was developed by the Ohio EPA for assessment of habitat loss due to sediment The QHEI was developed by the Ohio EPA for assessment of habitat loss due to sediment It can evaluate whether habitat is a limiting factor for a fish community, and which factors are the likely stressors It can evaluate whether habitat is a limiting factor for a fish community, and which factors are the likely stressors It can also help determine both the source of the sediment and the effects on the stream It can also help determine both the source of the sediment and the effects on the stream Correlated to fish IBI scores Correlated to fish IBI scores
Consists of 6 Metrics Substrate Substrate Instream Cover Instream Cover Channel Morphology Channel Morphology Riparian Zone and Bank Erosion Riparian Zone and Bank Erosion Pool – Riffle Quality Pool – Riffle Quality Map Gradient Map Gradient
Metric 1: Substrate Type Type Quality Quality
Substrate
Not embeddedEmbedded
Riffle Pool Riffle Pool NoneLow ModerateExtensive
Metric 2: Instream Cover Type Type Amount Amount
Instream Cover
Metric 3: Channel Morphology Sinuosity – number of bends in the reach Development – pool-riffle complex Channelization – human made channel modifications Stability – bank and channel stability
Channel Morphology
stability channelization
Pool/Riffle Development
Metric 4: Riparian Zone and Bank Erosion Width Width – Floodplain Quality Quality – Landuse Bank Erosion Bank Erosion – Stability
Riparian Zone
Metric 5: Pool-Riffle Quality Max. Depth Max. Depth Pool and Riffle Current Current Velocity estimate Morphology Morphology Pool-Riffle width
Pool-Riffle Quality
Metric 6: Map Gradient Channel slope - Channel slope - Measure stream length between two contours divide by contour interval
Map Gradient
Individual metrics
Score
Qualitative Habitat Evaluation Index Qualitative Habitat Evaluation Index It can evaluate whether habitat is a limiting factor for a fish community, and which factors are the likely stressors It can evaluate whether habitat is a limiting factor for a fish community, and which factors are the likely stressors It can also help determine both the source of the sediment and the effects on the stream It can also help determine both the source of the sediment and the effects on the stream