Instream Flow Needs Analysis - Okanagan Basin Water Board

More documents

Recommendations

Info

FINALOkanagan Basin Instream Flow NeedsFigure 3.4. Individual weekly naturalized flows and the lower 25% percentile of naturalized flow (lowerreference flow line) for Trout Creek (a zoom for greater resolution is provided in Figure 3.5)............47Figure 3.5. Zoomed view of a section of Figure 3.4 for Trout Creek showing individual weekly naturalizedflows relative to the approximate 25% percentile of naturalized flow (lower reference flow line). ......48Figure 3.6. Monthly BCIFN minimum risk flow thresholds and BCIFN-derived watershed conservationflows for Trout Creek (Node 42) overlaid with aggregated monthly naturalized flows for the1996-2006 period.. .................................................................................................................................49Figure 3.7. A zoomed-in view of a subset of Figure 3.6 showing monthly BCIFN minimum risk flowthresholds and BCIFN-derived watershed conservation flows for Trout Creek (Node 42)overlaid with aggregated monthly naturalized flows for the 1996-2006 period. 50Figure 3.8. Weekly BCIFN minimum risk flow (solid green) and BCIFN-derived conservation flow (dashedgreen) thresholds for an example stream node (Trout Creek – Node 42)...............................................51Figure 3.9. The same representation of BCIFN minimum risk flow and BCIFN-derived conservation flowthresholds as depicted in Figure 3.8 but overlaid with a smoothing routine based on a 4-weekmoving average calculation of the BCIFN to better illustrate how thresholds would be moregradually shifting if fully interpretable on a weekly time step...............................................................52Figure 3.10. Predicted optimal flows for spawning (solid red line) and rearing (dashed red line) of rainbowtrout present in Mission Creek (Node 22). ...........................................................................................53Figure 3.11. Predicted optimal flows for spawning (solid blue line) of kokanee present in Mission Creek(Node 22). ............................................................................................................................................54Figure 3.12. Predicted optimal flows for spawning (solid line) and rearing (dashed line) of both rainbow trout(red) and kokanee (blue) present in Mission Creek (Node 22).. ............................................................55Figure 3.13. Predicted optimal flows for spawning (solid lines) and rearing (dashed lines) of rainbow trout(red) and kokanee (red) present in Mission Creek (Node 22). ...............................................................56Figure 3.14. A zoom-in of the example presented in Figure 3.13 showing optimal flows for spawning (solidlines) and rearing (dashed lines) of rainbow trout (red) and kokanee (red) present in MissionCreek (Node 22). ..................................................................................................................................57Figure 3.15. Recommended weekly flows for Trout Creek (average/wet and dry years) based on the TroutCreek Water Use Plan presented in relation to our default IFN recommendations................................59Figure 3.16. Recommended weekly flows for Mission Creek based on the draft Mission Creek Water UsePlan presented in relation to our default IFN recommendations. ...........................................................60Figure 3.17. Okanagan River mainstem minimum and maximum instream flow guidelines for juvenilesockeye salmon derived from the sockeye submodel of the Okanagan Fish/Water ManagementTool. .......................................................................................................................................................61Figure 3.18. Known locations of sensitive species in the Okanagan Basin that are dependent on aquatichabitats at some point in their life cycle (records from BC Conservation Data Centre, March2009). .....................................................................................................................................................62Figure 3.19. Locations of historical Rocky Mountain Ridged Mussel surveys in Okanagan Lake............................69Figure 3.20. Zoomed views of areas of Okanagan Lake where Rocky Mountain Ridged Mussel have beenobserved. ................................................................................................................................................70Figure 3.21 Trout Creek exceedance plots for rainbow spawning and rearing, and kokanee spawning basedupon their associated meta-analysis mean optimal flow threshold. Example red/yellow/greensplit based upon P(x) = 25%/75%. .........................................................................................................73Figure 3.22 Mission Creek exceedance plots for rainbow spawning and rearing, and kokanee spawningbased upon their associated meta-analysis mean optimal flow threshold. Examplered/yellow/green split based upon P(x) = 25%/75%. .............................................................................74Figure 4.1. Conceptual relationship between the risk to aquatic biota and residual flow. .......................................82ESSA Technologies Ltd. &Solander Ecological Researchviii
FINALOkanagan Basin Instream Flow NeedsFigure 4.2. Time series of actual net inflows summed from daily observations of Okanagan lake levelscourtesy of the OKFWM tool. The red box identifies the shorter time series used for developingestimates of naturalized stream flow in the Okanagan hydrology and hydrologic modeling study(Summit 2009). ......................................................................................................................................83Figure 4.3. Relative inherent risk to fish of different guidelines used for setting IFN thresholds forOkanagan tributary stream nodes...........................................................................................................84Figure 4.4. Dynamic landscape model of stream fish life history (taken from Schlosser and Angermeier1995). .....................................................................................................................................................90ixESSA Technologies Ltd. &Solander Ecological Research
Page 2 and 3: Instream Flow Needs Analysis for th
Page 4 and 5: ESSA Technologies Ltd.1765 West 8th
Page 7 and 8: FINALOkanagan Basin Instream Flow N
Page 13: FINALOkanagan Basin Instream Flow N
Page 33: FINALOkanagan Basin Instream Flow N
Page 64 and 65:
FINALOkanagan Basin Instream Flow N
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174:
show all

Instream Flow Needs Analysis - Okanagan Basin Water Board

Create successful ePaper yourself

Delete template?

Save as template?