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This map displays existing River Habitat Survey (RHS) and citizen RHS surveys since 1994. Click on the coloured icons on the map to view site information and RHS indices for a site. Photographs, videos and 360⁰ virtual tours are also available by clicking on the relevant icon in the placemark. You can change the index displayed by using the drop-down box below.
Indices Information
- River Habitat Quality Index (RHQ) is the overall assessment of the river habitat quality representing a combination of the Habitat Modification scores and Habitat Quality Assessment (HQA) scores.
- Habitat Modification Class (HMC) quantifies the extent, potential impact and persistence of engineering structures (e.g., bridges, weirs, re-sectioning, embankments).
- Habitat Quality Assessment (HQA) Class represents the diversity and naturalness of channel features (e.g., bars, pools and riffles).
- Habitat Quality Assessment (HQA) Class represents the diversity and naturalness of channel features (e.g., bars, pools and riffles).
- Riparian Quality Index (RQI) quantifies the complexity, continuity and naturalness of the riparian vegetation.
- Hydromorphological Impact Ratio (HIR) shows the level of departure from natural state (based on assessment of the naturalness of channel substrate, flow regime, vegetation and geomorphic activity).
- For a more detailed description visit the River Habitat Survey website link here www.riverhabitatsurvey.org/manual/rhs-indices/