Downloaded 37 times
Rc101 day2
- 1. Stream ClassificationWhy ClassifyStreams?Communication Tool
- 2. Describe Existing Conditions& Trends
- 3.
- 4. Research ToolMorphologic StreamClassification SystemsSchumm (1977)Alluvial channelsMeandering, straight, braidedType related to channel stability & sediment transportMontgomery & Buffington (1993)Alluvial, colluvial, bedrock channelsChannel response related to sediment inputs6 classes of alluvial channels: cascade, step-pool, plane-bed, riffle-pool, regime, and braidedRosgen (1994)www.wildlandhydrology.com
- 5. Rosgen Classification ofNatural RiversBased on physical characteristics (empirical)Requires field measurementsRequires bankfull dimensionswww.wildlandhydrology.com
- 6. What factors affectstream morphology?Width
- 7.
- 8.
- 9.
- 10.
- 11.
- 12.
- 13. Sediment loadLeopold etal (1964)
- 14. Rosgen Classification ofNatural RiversDimension (cross-section)Pattern (plan form)Profile (bed form)Bed material (substrate)
- 15. Level 1 RosgenClassificationwww.wildlandhydrology.comwww.wildlandhydrology.com
- 16. Level 2 RosgenClassificationwww.wildlandhydrology.comwww.wildlandhydrology.com
- 17.
- 18. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 19. A StreamsIncised, Narrow& Deep, Steep SlopeColluvial Valley
- 20. A Stream ChannelWfpaBankfulldbkfdmaxSingleThread ChannelER = Wfpa/Wbkf < 1.4W/d = Wbkf/dbkf < 12S > 0.04 ft/ftWbkf
- 21.
- 22. Aa+ StreamsVery Steep(>0.1ft/ft)A1a+ Western NC
- 23. B StreamsModerately Incised,Wide & Shallow, Moderate Slope, Colluvial Valley
- 24. B Stream ChannelWfpaBankfulldbkfdmaxWbkfSingleThread ChannelER = Wfpa/Wbkf = 1.4 – 2.2W/d = Wbkf/dbkf > 12S = 0.02 – 0.04 ft/ft
- 25.
- 26.
- 27. C StreamsNot Incised,Wide & Shallow, Low SlopeAlluvial Valley
- 28. C Stream ChannelWfpaBankfulldbkfdmaxWbkfSingleThread ChannelER = Wfpa/Wbkf > 2.2W/d = Wbkf/dbkf > 12S < 0.02 ft/ft
- 29.
- 30.
- 31.
- 32. E StreamsNot Incised,Narrow & Deep, Low SlopeAlluvial Valley
- 33. E Stream ChannelWfpaBankfulldbkfdmaxSingleThread ChannelER = Wfpa/Wbkf > 2.2W/d = Wbkf/dbkf < 12S < 0.02 ft/ftWbkf
- 34.
- 35.
- 36.
- 37. E4b Western NC
- 38.
- 39. E4 Western NC
- 40. G StreamsIncisedNarrow &DeepModerate Slope
- 41. G Stream ChannelWfpaBankfulldbkfdmaxSingleThread ChannelER = Wfpa/Wbkf < 1.4W/d = Wbkf/dbkf < 12S = 0.02 – 0.04 ft/ftWbkf
- 42.
- 43.
- 44.
- 45.
- 46.
- 47.
- 48. F StreamsIncised, Wide& Shallow, Low Slope
- 49. F Stream ChannelWfpaBankfulldbkfdmaxWbkfSingleThread ChannelER = Wfpa/Wbkf < 1.4W/d = Wbkf/dbkf > 12S < 0.02 ft/ft
- 50. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 51.
- 52.
- 53.
- 54.
- 55.
- 56. D & DAStreamsMultiple Channels, Wide & Shallow, Low SlopeD4 Virginia
- 57. D Stream ChannelWfpaBankfulldbkfdmaxWbkfMultipleThread ChannelER = Wfpa/Wbkf > 2.2W/d = Wbkf/dbkf > 40
- 58. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 59.
- 60.
- 61.
- 62. C4 -> D4Western NC
- 63. ER=11; W/d=16; S=0.004;D50=1 mm
- 64. ER=1.3; W/d=7; S=0.007;D50=1.5 mm
- 65. ER=2.2; W/d=14; S=0.024;D50=75 mm
- 66. ER=6.5; W/d=10.5; S=0.008;D50=1.5 mm
- 67. ER=1.5; W/d=10; S=0.009;D50=2 mm
- 68. ER=1.4; W/d=10; S=0.050;D50=50 mm
- 69. ER=1.3; W/d=15; S=0.002;D50=0.5 mm
- 70. ER=1.3; W/d=7; S=0.007;D50=1.5 mm
- 71. ER=5.5; W/d=29; S=0.009;D50=15 mm
- 72. ER=2.2; W/d=14; S=0.035;D50=110 mm
- 73. ER=5.5; W/d=8.2; S=0.025;D50=12 mm
- 74. ER=2.1; W/d=15; S=0.065;D50=120 mm
- 75. ER=2.2; W/d=14; S=0.024;D50=75 mm
- 76. Stream Channel Succession(WARSSS)
- 77. Stream Channel Succession(WARSSS)http://www.epa.gov/WARSSS/sedsource/successn.htm
- 78.
- 79. Bank Erosion HazardIndex (BEHI)
- 80. Bank Erosion HazardIndex (BEHI)
- 81. Bank Erosion HazardIndex (BEHI)
- 85. Stream ClassificationWhy ClassifyStreams?Communication Tool
- 86. Describe Existing Conditions& Trends
- 87.
- 88. Research ToolMorphologic StreamClassification SystemsSchumm (1977)Alluvial channelsMeandering, straight, braidedType related to channel stability & sediment transportMontgomery & Buffington (1993)Alluvial, colluvial, bedrock channelsChannel response related to sediment inputs6 classes of alluvial channels: cascade, step-pool, plane-bed, riffle-pool, regime, and braidedRosgen (1994)www.wildlandhydrology.com
- 89. Rosgen Classification ofNatural RiversBased on physical characteristics (empirical)Requires field measurementsRequires bankfull dimensionswww.wildlandhydrology.com
- 90. What factors affectstream morphology?Width
- 91.
- 92.
- 93.
- 94.
- 95.
- 96.
- 97. Sediment loadLeopold etal (1964)
- 98. Rosgen Classification ofNatural RiversDimension (cross-section)Pattern (plan form)Profile (bed form)Bed material (substrate)
- 99. Level 1 RosgenClassificationwww.wildlandhydrology.comwww.wildlandhydrology.com
- 100. Level 2 RosgenClassificationwww.wildlandhydrology.comwww.wildlandhydrology.com
- 101. Riffle DimensionsWbkfBankfullAbkfdbkfMeasure BankfullWidth (Wbkf) and Bankfull Area (Abkf)Mean Depth, dbkf = Abkf / WbkfWidth to Depth Ratio, W/d = Wbkf / dbkf
- 102. W/d = 9.3/ 1.5 = 6.2 WbkfdbkfAbkf
- 103. Entrenchment RatioER =Wfpa / WbkfWfpa = Width of Flood Prone Area measured at the elevation twice bankfull max depth above thalwegWbkf = Width of Bankfull ChannelWfpaBankfull2 x dmaxabove thalwegdmaxWbkf
- 104. ER = Wfpa/ Wbkf = 63/ 15 = 4.2 WfpaWbkf
- 105. Bed Material (Substrate)Silt/Clay:< 0.062 mmSand: 0.062 – 2 mmGravel: 2 – 64 mmCobble: 64 – 256 mmBoulder: 256 – 2048 mm
- 106.
- 107.
- 108. Valley Types: (www.epa.gov/watertrain/stream_class)Valley Type II Moderately steep, gentle sloping side slopes often in colluvial valleysFrom EPA Watershed Academy: Fundamentals of the Rosgen Stream Classification System
- 109. Valley Types: (www.epa.gov/watertrain/stream_class)Valley Type VIII Wide, gentle valley slope with well-developed floodplain adjacent to river terracesFrom EPA Watershed Academy: Fundamentals of the Rosgen Stream Classification System
- 110. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 111. A StreamsIncised, Narrow& Deep, Steep SlopeColluvial Valley
- 112.
- 113. A Stream ChannelWfpaBankfulldbkfdmaxSingleThread ChannelER = Wfpa/Wbkf < 1.4W/d = Wbkf/dbkf < 12S > 0.04 ft/ftWbkf
- 114.
- 115.
- 116.
- 117. Aa+ StreamsVery Steep(>0.1ft/ft)A1a+ Western NC
- 118.
- 119.
- 120. B StreamsModerately Incised,Wide & Shallow, Moderate Slope, Colluvial Valley
- 121. B Stream ChannelWfpaBankfulldbkfdmaxWbkfSingleThread ChannelER = Wfpa/Wbkf = 1.4 – 2.2W/d = Wbkf/dbkf > 12S = 0.02 – 0.04 ft/ft
- 122. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 123.
- 124.
- 125.
- 126.
- 127.
- 128.
- 129.
- 130.
- 131. C StreamsNot Incised,Wide & Shallow, Low SlopeAlluvial Valley
- 132. C Stream ChannelWfpaBankfulldbkfdmaxWbkfSingleThread ChannelER = Wfpa/Wbkf > 2.2W/d = Wbkf/dbkf > 12S < 0.02 ft/ft
- 133. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 134.
- 135.
- 136.
- 137.
- 138.
- 139.
- 140.
- 141.
- 142.
- 143. E StreamsNot Incised,Narrow & Deep, Low SlopeAlluvial Valley
- 144. E Stream ChannelWfpaBankfulldbkfdmaxSingleThread ChannelER = Wfpa/Wbkf > 2.2W/d = Wbkf/dbkf < 12S < 0.02 ft/ftWbkf
- 145. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 146.
- 147.
- 148.
- 149.
- 150.
- 151.
- 152. E4b Western NC
- 153. E4 Western NC
- 154.
- 155.
- 156.
- 157. E4 Western NC
- 158.
- 159. G StreamsIncisedNarrow &DeepModerate Slope
- 160. G Stream ChannelWfpaBankfulldbkfdmaxSingleThread ChannelER = Wfpa/Wbkf < 1.4W/d = Wbkf/dbkf < 12S = 0.02 – 0.04 ft/ftWbkf
- 161. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 162.
- 163.
- 164.
- 165.
- 166.
- 167.
- 168.
- 169.
- 170.
- 171.
- 172.
- 173.
- 174.
- 175. F StreamsIncised, Wide& Shallow, Low Slope
- 176. F Stream ChannelWfpaBankfulldbkfdmaxWbkfSingleThread ChannelER = Wfpa/Wbkf < 1.4W/d = Wbkf/dbkf > 12S < 0.02 ft/ft
- 177. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 178.
- 179.
- 180.
- 181.
- 182.
- 183.
- 184.
- 185.
- 186.
- 187.
- 188.
- 189.
- 190. D & DAStreamsMultiple Channels, Wide & Shallow, Low SlopeD4 Virginia
- 191. D Stream ChannelWfpaBankfulldbkfdmaxWbkfMultipleThread ChannelER = Wfpa/Wbkf > 2.2W/d = Wbkf/dbkf > 40
- 192. Stream Types inLandscape Positionswww.wildlandhydrology.com
- 193.
- 194.
- 195.
- 196.
- 197.
- 198. C4 -> D4Western NC
- 199. C4 -> D4Western NC
- 200.
- 201.
- 202. ER=11; W/d=16; S=0.004;D50=1 mm