PROCEDURE FOR THE EVALUATION OF HMS, HQA and LRD
HMS is the total of the scores obtained at Spot-check and Sweep-up level. The scores for every record are reported in the following two tables.
Features considered for the evaluation of HMS for every spot-check (SC).
Features Score (for every record) Bank reinforcement 2 Bank toe 1 reinforcement Bank top 1 reinforcement Channel 2 reinforcement Re-sectioning of the 1 banks and channel Artificial bank (2 1 stages) Embankments 1 Culverts 8 Weir/Dams… 2 Scores for number of Spot-checks <3 3-5 ≥6 Poached river bank 0 1 2
Features considered for the evaluation of HMS for the sweep-up.
Features Banks One (or channel) Both Artificial 1 - substratum of the channel Reinforced bank 2 3 Bank reinforced 1 2 only at the toe or the top Re-sectioning of 1 2 the bank Artificial bank (2 3 stages) Embankments 1 1 Culverts 8 for each one
1 Weir/Dams… 2 for each one Number of features 1 ≥2 Bridges 1 2 Deflectors 1 2 <33% ≥33% Flow regulation 1 2 Alignment of the 5 10 channel
HQA is the total of the scores obtained at Spot-check and Sweep-up level. The scores for every record are reported in the following two tables.
Features considered for the evaluation of HQA.
Spot-check Sweep-up Category Feature #1 #2-3 #4≥ 1 each (if not Flow type Each type of flow 1 2 3 registered in spotcheck) 1 each (if not Each type of 1 2 3 registered in substratum spotcheck) 1 each (if not Substratu Boulders 1 2 3 registered in m type spotcheck) 1 each (if not Bedrock 1 2 3 registered in spotcheck) 1 each (if not Mid-channel bar 1 2 3 registered in (no vegetation) spotcheck) Depositio 1 each (if not n features Mid-channel bar 1 2 3 registered in of the (vegetation) spotcheck) channel 1 each (if not Mature island 1 2 3 registered in spotcheck) Erosion Eroding earth 1 2 3 1 each (if not and cliff registered in deposition spotcheck)
2 1 each (if not Stable earth cliff 1 2 3 registered in spotcheck) 1 each (if not Unvegetated 1 2 3 registered in point bar spotcheck) 1 each (if not features of Vegetated point 1 2 3 registered in the bank bar spotcheck) 1 each (if not Unvegetated side 1 2 3 registered in bar spotcheck) 1 each (if not Vegetated side 1 2 3 registered in bar spotcheck) 3-8 ≥9 Both point bars 1 2 Vegetatio Simple vegetation type 1 2 3 - n structure Complex vegetation type 1 2 3 - Liverworts/mosses/lichens 1 2 3 - Emergent broad-leaved 1 1 2 - herbs Emergent 1 1 2 - Macrophy reeds/sedges/rushes tes Floating-leaved 1 1 2 - Amphibious 1 1 2 - Submerged broad-leaved 1 1 2 - Submerged linear-leaved 1 1 2 - Submerged fine-leaved 1 1 2 - Present Extensive Broadleaf woodland 1 2 Soil use Moorland 1 2 within 50 Wetland 1 2 m of the Just registered: broadleaf or coniferous woodland bank 7 and wetlands Number Trees in small groups 1 of trees Continous or semi-continuous trees 3 Overhanging boughs 1 1 Other Coarse woody debris 1 3 features Fallen trees 1 5 Special Natural falls (> 5m), natural open water, leafy 5 features debris, marsh, flush, water meadow…
3 4 Features considered for the evaluation of LRD for the single Spot-check.
Category Feature Score Main channel Secondary channel Lentic (dry or not 8 - perceptible) Intermediate (chute, 2 1 smooth and upwelling) F Flow type Rippled -0.5 Unbroken standing -1 -0.5 waves Lotic (broken standing -2 -1 waves, free fall…) Clay, silt, sand 1 0.5 Bedrock, gravel 0 0 S Channel substratum Cobble, boulders -1 -0.5 Artificial 0 0 >75 cm 1 D Maximum depth of the water 25
5 Features considered for the evaluation of LRD for the Sweep-up.
Category Feature Present Frequent Very frequent (1-3) (3-6) (>6) Lentic (dry) 16 24 24 Lentic (not perceptible) 4 6 10 Intermediate (chute, 4 6 10 SWC Flow type smooth and upwelling) Rippled -1 -1.5 -2.5 Unbroken standing waves -2 -3 -5 Lotic (broken standing -4 -6 -10 waves, free fall…) Bars Every bar registered -0.5 (max -5) Major Intermediate Minor Weirs, dams… 2 1 1 SWSa Artificial features Fords, deflector 1 1 1 <33% >33% SWSa General information Is there flow regulation? 3 7 Natural falls > 5m -3 -5 SWSn Particular features Natural falls < 5m -1 -3 Leafy debris 1 3
6 Being:
Chi: main channel (I) or secondary channel (II) a/n: artificial or natural x: number of the spotcheck ww: width of the water for every single channel
Tww: total width of the water
The total LRD is obtained as:
Where LRDa represents the part of LRD due to artificial features of the channel and LRDn represents the part of LRD due to natural features.
For every spotcheck:
For the whole site:
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