Appendix 1. Names and abbreviations of RHS attributes included in the analysis
No. / Category / Attribute / Acronym / No. / Category / Attribute / Acronym1. / Channel vegetation type / Amphibious / AMPH / 104. / Bank material / Fabric / FA
2. / Channel vegetation type / Emergent broad lived / EBL / 105. / Bank material / Bio-engineering materials / BL
3. / Channel vegetation type / Emergent reeds / ER / 106. / Flow type / Not visible / NV
4. / Channel vegetation type / Filamentous algae / FA / 107. / Flow type / Free fall / FF
5. / Channel vegetation type / Floating leaved / FL / 108. / Flow type / Chute flow / CH
6. / Channel vegetation type / Free floating / FF / 109. / Flow type / Broken standing waves / BW
7. / Channel vegetation type / Liveworts / LIV / 110. / Flow type / Unbroken standing waves / UW
8. / Channel vegetation type / None / NO / 111. / Flow type / Rippled / RP
9. / Channel vegetation type / Submerg. broad leaved / SBL / 112. / Flow type / Smooth / SM
10. / Channel vegetation type / Submerged fine leaved / SFL / 113. / Flow type / Not perceptible / NP
11. / Channel vegetation type / Submerged linear lived / SLL / 114. / Flow type / Upwelling / UP
12. / Trees and other associated features / None / NO / 115. / Flow type / Chaotic flow / CF
13. / Trees and other associated features / Isol/scatt / IS / 116. / Flow type / Dry / DR
14. / Trees and other associated features / Regular / REG / 117. / Channel substrate / Artificial / AR
15. / Trees and other associated features / Occasional / OCC / 118. / Channel substrate / Not visible / NV
16. / Trees and other associated features / Semi-con / SC / 119. / Channel substrate / Bedrock / BE
17. / Trees and other associated features / Continous / CON / 120. / Channel substrate / Boulders / BO
18. / Trees and other associated features / Shading / SH / 121. / Channel substrate / Cobble / CO
19. / Trees and other associated features / Overhanging boughs / OB. / 122. / Channel substrate / Gravel/pebbles (pebbles) / GP(P)
20. / Trees and other associated features / Bankside roots / BR / 123. / Channel substrate / Grave/pebbles (gravel) / GP(G)
21. / Trees and other associated features / Under roots / UR / 124. / Channel substrate / Sand / SA
22. / Trees and other associated features / Fallen trees / FT / 125. / Channel substrate / Silt / SI
23. / Trees and other associated features / Large woody debris / LWD / 126. / Channel substrate / Clay / CL
24. / Land-use 50m from banktop (sweep-up) / Broadleaf/mixed woodland (97 form) / BL97 / 127. / Channel substrate / Peat / PE
25. / Land-use 50m from banktop (sweep-up) / Broadleaf/mixed woodland(seminatural) / BL / 128. / Channel substrate / Earth / EA
26. / Land-use 50m from banktop (sweep-up) / Broadleaf/mixed plantation / BP / 129. / Channel modifications / Not known / NK
27. / Land-use 50m from banktop (sweep-up) / Coniferous woodland (semi-natural) / CW / 130. / Channel modifications / None / NO
28. / Land-use 50m from banktop (sweep-up) / Coniferous plantation / CP / 131. / Channel modifications / Culverted / CV
29. / Land-use 50m from banktop (sweep-up) / Scrub & Shrub / SH / 132. / Channel modifications / Resectioned / RS
30. / Land-use 50m from banktop (sweep-up) / Orchard / OR / 133. / Channel modifications / Reinforced / RI
31. / Land-use 50m from banktop (sweep-up) / Wetland / WT / 134. / Channel modifications / Dam / DA
32. / Land-use 50m from banktop (sweep-up) / Moorland/heath / MH / 135. / Channel modifications / Ford / FO
33. / Land-use 50m from banktop (sweep-up) / Open water / OW / 136. / Channel features / Not visible / NV
34. / Land-use 50m from banktop (sweep-up) / Artificial open water / AOW / 137. / Channel features / None / NO
35. / Land-use 50m from banktop (sweep-up) / Natural open water / NOW / 138. / Channel features / Embanked / EB
36. / Land-use 50m from banktop (sweep-up) / Rough/unimproved grassland/pasture / RP / 139. / Channel features / Exposed bedrock/boulders / RO
37. / Land-use 50m from banktop (sweep-up) / Improved/semi-improved grass / IG / 140. / Channel features / Vegetated rocks / VR
38. / Land-use 50m from banktop (sweep-up) / Tall herbs/rank vegetation / TH / 141. / Channel features / Unvegetated mid-channel bar / MB
39. / Land-use 50m from banktop (sweep-up) / Rock, scree & sand dunes / RD / 142. / Channel features / Vegetated mid-channel bar / VB
40. / Land-use 50m from banktop (sweep-up) / Suburban/urban development / SU / 143. / Channel features / Mature island / MI
41. / Land-use 50m from banktop (sweep-up) / Tilled land / TL / 144. / Channel features / Urban debris / TR
42. / Land-use 50m from banktop (sweep-up) / Irrigated land / IL / 145. / Channel material / Not visible / NV
43. / Land-use 50m from banktop (sweep-up) / Parkland & Gardens / PG / 146. / Channel material / Bedrock / BE
44. / Land-use 50m from banktop (sweep-up) / Not visible / NV / 147. / Channel material / Boulders / BO
45. / Bank profiles (sweep-up) / Vertical/undercut / VU / 148. / Channel material / Cobble / CO
46. / Bank profiles (sweep-up) / Vertical plus toe / VT / 149. / Channel material / Gravel/sand / GS
47. / Bank profiles (sweep-up) / Steep (>45) / S / 150. / Channel material / Earth / EA
48. / Bank profiles (sweep-up) / Gentle / G / 151. / Channel material / Peat / PE
49. / Bank profiles (sweep-up) / Composite / C / 152. / Channel material / Clay / CL
50. / Bank profiles (sweep-up) / Natural berm / NB / 153. / Channel material / Concrete / CC
51. / Bank profiles (sweep-up) / Resectioned (reprofiled) / RS / 154. / Channel material / Sheet piling / SP
52. / Bank profiles (sweep-up) / Reinforced - whole bank / RIW / 155. / Channel material / Wood piling / WP
53. / Bank profiles (sweep-up) / Reinforced - top only / RIT / 156. / Channel material / Gabion / GA
54. / Bank profiles (sweep-up) / Reinforced - toe only / RITO / 157. / Channel material / Brick/laid stone / BR
55. / Bank profiles (sweep-up) / Artificial two-stage / ATS / 158. / Channel material / Rip-rap / RR
56. / Bank profiles (sweep-up) / Poached / PC / 159. / Channel material / Tipped debris / TD
57. / Bank profiles (sweep-up) / Embanked / EM / 160. / Channel material / Fabric / FA
58. / Bank profiles (sweep-up) / Set-back embankments / SBE / 161. / Channel material / Bio-engineering materials / BL
59. / Extent of channel and bank features / Free fall flow (waterfalls) / FF / 162. / Bank modifications / Not known / NK
60. / Extent of channel and bank features / Chute flow (cascades) / CH / 163. / Bank modifications / None / NO
61. / Extent of channel and bank features / Broken standing waves (rapids) / BW / 164. / Bank modifications / Resectioned / RS
62. / Extent of channel and bank features / Unbroken standing waves (riffles) / UW / 165. / Bank modifications / Reinforced / RI
63. / Extent of channel and bank features / Rippled flow (runs) / RP / 166. / Bank modifications / Poached / PC
64. / Extent of channel and bank features / Upwelling (boils) / UP / 167. / Bank modifications / Berm / BM
65. / Extent of channel and bank features / Smooth flow (glides) / SM / 168. / Bank modifications / Embanked / EM
66. / Extent of channel and bank features / No perceptible flow (pools) / NP. / 169. / Margianl and bank features / Not visible / NV
67. / Extent of channel and bank features / Ponded reach(es) / DR / 170. / Margianl and bank features / None / NO
68. / Extent of channel and bank features / No flow (dry) / NF / 171. / Margianl and bank features / Eroded cliff / EC
69. / Extent of channel and bank features / Marginal deadwater / MD / 172. / Margianl and bank features / Stable cliff / S.C.
70. / Extent of channel and bank features / Eroding cliff / EC / 173. / Margianl and bank features / Unvegetated point bar / PB
71. / Extent of channel and bank features / Stable cliff / SC / 174. / Margianl and bank features / Vegetated point bar / VP
72. / Extent of channel and bank features / Exposed bedrock / BE / 175. / Margianl and bank features / Unvegetated side bar / SB
73. / Extent of channel and bank features / Exposed boulders / BO / 176. / Margianl and bank features / Vegetated side bar / VS
74. / Extent of channel and bank features / Vegetated bedrock/boulders / VBE / 177. / Margianl and bank features / Natural berm / NB
75. / Extent of channel and bank features / Unvegetated mid-channel bar(s) / UMB / 178. / Land use (5 m) / Broadleaf/mixed woodland / BL
76. / Extent of channel and bank features / Vegetated mid-channel bar(s) / VMB / 179. / Land use (5 m) / Broadleaf/mixed plantation / BP
77. / Extent of channel and bank features / Mature island(s) / MI / 180. / Land use (5 m) / Coniferous woodland / CW
78. / Extent of channel and bank features / Unvegetated side bar(s) / USB / 181. / Land use (5 m) / Coniferous plantation / CP
79. / Extent of channel and bank features / Vegetated side bar(s) / VSB / 182. / Land use (5 m) / Scrub & shurbs / SH
80. / Extent of channel and bank features / Unvegetated point bar(s) / UPB / 183. / Land use (5 m) / Orchard / OR
81. / Extent of channel and bank features / Vegetated point bar(s) / VPB / 184. / Land use (5 m) / Wetland / WL
82. / Extent of channel and bank features / Unvegetated silt deposit(s) / USD / 185. / Land use (5 m) / Moorland/heaths / MH
83. / Extent of channel and bank features / Discrete unvegetated sand deposit(s) / DUSD / 186. / Land use (5 m) / Artificial open water / AW
84. / Extent of channel and bank features / Discrete unvegetated gravel deposit(s) / DUGD / 187. / Land use (5 m) / Natural open water / OW
85. / Riffles, pools, point bars (sweep-up) / Riffles / R / 188. / Land use (5 m) / Rough unimproved grasslands/pastures / RP
86. / Riffles, pools, point bars (sweep-up) / Pools / P / 189. / Land use (5 m) / Improved grasslands / IG
87. / Riffles, pools, point bars (sweep-up) / Unvegetated point bar / UPB / 190. / Land use (5 m) / Tall herbs / TH
88. / Riffles, pools, point bar(sweep-up)s / Vegetated point bar / VPB / 191. / Land use (5 m) / Road / RD
89. / Bank material / Not visible / NV / 192. / Land use (5 m) / Suburban/urban development / SU
90. / Bank material / Bedrock / BE / 193. / Land use (5 m) / Tilled land / TL
91. / Bank material / Boulders / BO / 194. / Land use (5 m) / Irrigated land / IL
92. / Bank material / Cobbles / CO / 195. / Land use (5 m) / Parkland and gardens / PG
93. / Bank material / Gravel/sand / GS / 196. / Land use (5 m) / Not visible / NV
94. / Bank material / Earth / EA / 197. / Banktop structure / Bare / B
95. / Bank material / Peat / PE / 198. / Banktop structure / Uniform / U
96. / Bank material / Clay / CL / 199. / Banktop structure / Simple / S
97. / Bank material / Concrete / CC / 200. / Banktop structure / Complex / C
98. / Bank material / Sheet piling / SP / 201. / Banktop structure / Not visible / NV
99. / Bank material / Wood piling / WP / 202. / Bankface structure / Bare / B
100. / Bank material / Gabion / GA / 203. / Bankface structure / Uniform / U
101. / Bank material / Brick/laid stone / BR / 204. / Bankface structure / Simple / S
102. / Bank material / Rip-rap / RR / 205. / Bankface structure / Complex / C
103. / Bank material / Tipped debris / TD / 206. / Bankface structure / Not visible / NV
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Appendix 2. Analysis of attribute’s categories abundance. (Symbols explained in Appendix 1).
Attribute's category / Abundant attributes (pi>5%)(most frequent attribute bold) / Rare attributes (pi<5%)
(attributes absent bold)
Lowlands / Mountains / South - Europe / Alpine / Lowlands / Mountains / South - European / Alpine
Flow type / SM, UW, RP, NP / RP, UW, BW, CH, SM, NP. / RP, CH, BW, UW, SM, NP. / RP, CH, BW, UW, SM / CR, DR,FF, NV, CH, BW, UP / DR, NV, FF, UP / UP, DR, NV, FF, CF / DR, UP, NP., FF, NV
Channel substrate / GP(G), AR, BE, BO, CO, GP, SA / BO, AR, BE, BO, CO, GP, SA / BO, NV, BE, BO, CO, GP, / BO, NV, BE, CO, GP(P) / PE, NV, SI, CL, EA / PE, NV, SI, CL, EA / PE, AR, SA, SI, CL, EA / SI, CL, PE, AR, GP(G), SA
Channel modifications / NO, NK, RS / NO, RS, RI / NO, RI / NO, NK, RS, RI, DA / CV, FO, RI, DA / CV, FO, NK, DA / CV, FO, NK, RS, DA / FO, CV
Channel features / NO, VB, MI / NO, MB, VB, MI / NO, RO, MB, VB / NO, EB, MB, VB / RO, VR, NV, EB, MB, TR / VR, TR, NV, EB, RO / NV, VR, EB, MI, TR / RO, VR, MI, TR, NV
Bank material / EA, PE / EA, BO, CO, GS / EA, BE, BO, CO, GS / BO, CO, GS, EA / TD, FA, BL, SP, WP, GA, NV, BE, BO, CO, GS, CL, CC, , BR, RR / TD, FA, BL, NV, BE, PE, GS, CL, CC, SP, WP, GA, RR, / TD, FA, BL,WP,SP, NV, PE, GS, CL, CC,GA, BR, RR, / TD, FA, BL, GA, CL, PE, NV, BE, GS, , CC, SP, WP, , RR,
Riffles. pools, point bars / R, P, UPB, VPB / R, P, UPB, VPB / R, P, UPB, VPB / R, P, UPB, VPB / - / - / - / VPB
Extent of channel and
bank features / SM, UW, RP, NP, MD, BO, USB, VSB, UPB / RP, BW, UW, SM, NP., BO, USB / SM, UW, RP, NP., MD, BO, USB, VSB, UPB / RP, BW, UW, SM, NP., BO, USB, CH / FF, CH, BW, UP, DR, NF, EC, S.C., BE, VPB, USD, DUSD, DUGD / FF, CH, UP, DR, NF, MD, EC, S.C., BE, VBE, UMB, VMB, MI, VSB, UPB, VPB, USD, DUSD, DUGD / DR, FF, CH, BW, UP, NF, EC, S.C., BE, VPB, USD, DUSD, DUGD / VPB, VBE, DR, NF, FF, UP, MD, EC, S.C., BE, UMB, VMB, MI, VSB, UPB, VPB, USD, DUSD, DUGD
Bank modifications / NO, RS, RI, PC / NO, RS, RI, EM / NO, RS, RI, PC / RI, RS, NO / BM, NK, EM / BM, NK, PC, / NK, BM, EM / BM, NK, PC, EM
Marginal and bank features / NO, EC, S.C., PB, SB, VS / NO, EC, S.C., PB, SB, VS / NO, EC, S.C., PB, SB, VS, VP / NO, EC, S.C., PB, SB, VS, / NV, VP, NB / NB, NV, VP / NB, NV / NB, NV, VP
Banktop structure / S, B, U, C / S, B, U, C / S, B, U, C / S, B, U, C / NV / NV / NV / NV
Bankface structure / S, B, U, C / S, B, U, C / S, B, U, C / S, B, U, C / NV / NV / NV / NV
Bank profiles (sweep-up) / S, VU, VT, G, RS, RIW, RITO / VU, VT, S, G, RS, RIW, RITO / VU, VT, S,G, C, RIW / VU, VT, S, G, C, RS, RIW, RITO / C, NB, RIT, ATS, PC, EM, SBE / C, NB, RIT, ATS, PC, EM, SBE / EM, NB, RS, RIT, RITO, ATS, PC, SBE / NB, ATS, PC, RIT, EM, SBE
Trees and other
associated features / SH, S.C., CON, OB., BR, UR, FT, LWD / SH, S.C., CON, OB., BR, UR, FT, LWD / UR, SH, S.C., CON, OB., BR, FT, LWD / SH, S.C., CON, OB., BR, UR, FT, LWD / NO, IS, REG, OCC / NO, IS, REG, OCC / NO, IS, REG, OCC, S.C. / NO, IS, REG, OCC
Land-use 50 m
(sweep-up) / TH, BL, SH, WT, RP, IG / TH, BL97, BL, SH, IG, SU / BL, SH, MH, RP, IG, TH, SU, TL / SU, BL97, BL, SH, RP, IG, TH, RD, SU, PG / NV, BL97, BP, CW, CP, OR, MH, OW, AOW, NOW, RD, SU, TL, IL, PG / BP, CW, CP, OR, WT, MH, OW, AOW, NOW, RP, RD, TL, IL, PG, NV / BL97, OW, AOW, IL, PG, NV, BP, CW, CP, OR, WT, NOW, RD / CW, OR, MH, AOW, NOW, IL, BP, CP, WT, OW, TL, NV
Land-use (5 m) / TH, WL, RP, IG, SU, TL / SU, RP, IG, TH, TL / TH, BL, OR, RP, IG, SU, TL / SU, RP, IG, PG / BL, BP, CW, CP, SH, AW, OW, RD, IL, NV OR, MH, PG / BP, CW, CP, SH, AW, OW, RD, NV,OR, WL, MH, PG / BP, CW, CP, SH, AW, OW, RD, IL, PG, NV, MH, WL, / BL, BP, CW, CP, SH, OR, MH, AW, OW, RD, IL, NV WL, TH
Vegetation / ER, AMPH, EBL, FA, FL, FF, LIV, NO, SBL, SFL, SLL / NO, AMPH, LIV / NO, EBL, ER, FA, LIV / LIV, FA, NO / - / EBL, ER, FL, FF, SBL / SLL, AMPH, FL, FF, SBL, / AMPH, SBL, SFL, SLL, FL, FF, EBL, ER
Channel material
(Sweep - Up) / EA, BO, GS, PE / EA, NV, BE, BO, CO, GS, CC, BR / EA, BE, BO, CO, GS / BO, BE, BO, CO, GS, CC, BR, RR / SP, WP, GA, TD, FA, BL, NV, BE, CO, CL, CC, BR, RR, NK / TD, FA, BL, PE, CL, SP, WP, GA, RR, NK / SP, WA, TD, FA, BL, NK, NV, PE, CL, CC, BR, RR / PE, CL, GA, TD, FA, BL, NV, SP, WP, NK
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