|
<br />.
<br />
<br />parameters, average depth, percent wetted perimeter, and average velocity are used to develop
<br />biologic instream flow recommendations, The CDOW has determined that maintaining these
<br />three hydraulic parameters at adequate levels across riffle habitat types, aquatic habitat in pools
<br />and runs will also be maintained for most life stages of fish and aquatic invertebrates (Nehring
<br />1979; Espegren 1996),
<br />
<br />For this segment of stream, 25 data sets were collected with the results shown in Table I below.
<br />Table 1 shows who collected the data (Party), the date the data was collected (Date), the
<br />measured discharge at the time of the survey (Q), the accuracy range of the predicted flows
<br />based on Manning Equation (240% and 40% of Q), the summer flow recommendation based on
<br />meeting 3 of 3 hydraulic criteria and the winter flow recommendation based upon 2 of 3
<br />hydraulic criteria,
<br />
<br />Table 1: Data
<br />
<br />.
<br />
<br />Party Location Q 250%-40% Summer (3/3) Winter (2/3)
<br />BLMlCDOW Sawpit #1 75,6 189 - 30.2 77.0 26,7(1)
<br />BLM/CDOW Sawpit #2 70.8 177 - 28.3 152 32.4
<br />BLM/CDOW Sawpit #3 71.7 179-28,7 113 18,8(1)
<br />BLMlCDOW Sawpit #4 77,5 194-31.0 658(1) 68,0
<br />BLM/CDOW Sawpit #5 70.9 177-28.4 174 125
<br />BLMlCDOW Placerville # 1 75,1 188 - 30.0 63.2 31.3
<br />BLMlCDOW Placerville #2 79,6 199-31.8 93,0 55,6
<br />BLM/CDOW Placerville #3 76.0 190 - 30.4 84.7 46,7
<br />BLM/CDOW Placerville #4 76,5 191 - 30.6 66.3 27.2
<br />BLM/CDOW Placerville #5 81.2 203 - 32,5 121 55,0
<br />BLM/CDOW Placerville #6 71.7 179 - 28,7 205(1) 86.8
<br />BLMlCDOW Placerville #7 76,7 192 - 30.7 208(1) 83,7
<br />CD OW Beaver Ck #1 68.5 171 - 27.4 89,3 77.9
<br />CDOW Beaver Ck #2 77.8 195-31.1 103 42.4
<br />CDOW Beaver Ck #3 74.0 185-29.6 103 67,5
<br />CDOW Beaver Ck #4 72.3 181 - 28,9 80,8 30.8
<br />CD OW Beaver Ck #5 61.0 153 - 24.4 639(1) 94,6
<br />CDOW Beaver Ck #6 57.6 144-23,0 82.6 51.7
<br />CDOW Beaver Ck #7 66,0 165 - 26.4 78.2 57,8
<br />CDOW Beaver Ck #8 112,8 282 - 45,1 56.6 30,0(1)
<br />BLM/CDOW Sinclair #1 51.6 129 - 20,6 68.3 13,0(1)
<br />BLM/CDOW Sinclair #2 62,1 155 - 24.8 18i1) 72.4
<br />BLMlCDOW Sinclair #3 52.6 132-21.0 96,7 36.6
<br />BLM/CDOW Sinclair #4 50.5 126 - 20,2 65.0 34,8
<br />BLMlCDOW Sinclair #5 49,9 125 - 20.0 83,9 71.6
<br />
<br />BLM - Bureau of Land Management DOW = DIViSion OfWlldhfe
<br />(1) Predicted flow outside of the accuracy range of Manning's Equation ? = Criteria never met in R2CROSS Staging Table.
<br />
<br />.
<br />
|