Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TABLE 5 <br />COLORADO RIVER CROSS-SECTION SELECTION <br /> <br />..........H..._........ ..........................,..............__,....... <br />...................................'................. "." .......................,.....,................................'...'.....................'.','....,........................ <br />...,.........................,...................... "." .....................-......'..,.................................................................,',...,.................. <br />.......................... .. ......................................~........................ <br />rmAdBH ...FCO'WVALUES...(t1F$).......... <br /> <br />iillliiil l~".i";;;; <br /> <br /> <br /> 38700, 42900 DETAILED STUDY COE STUDY <br /> (Cl & C2) A V AILABLE <br />2 38700, 42900 (C2) DETAILED STUDY COE STUDY <br /> A V AILABLE <br />3 C2 - C6 DETAILED STUDY COE STUDY <br /> A V AILABLE <br />4 41054, 45791 (C6) DETAILED STUDY COESTUDY <br /> AVAILABLE <br />5 44400, 49300 (C6 -C8) CANYON REACH N/A <br />6 44400, 49300 (C8) A-A' FIELD CALCULATED <br /> SURVEYED <br />7 44400, 49300 (C8) CANYON REACH N/A <br />8 45098, 50030 (C9) DETAILED STUDY FEMA STUDY <br /> AVAILABLE <br />9 71619, 80289 (C9 - Cll) DETAILED STUDY FEMA STUDY <br /> A V AILABLE <br />10 73340, 82262 (CI2) CANYON REACH N/A <br />11 74565, 83668 (CI3) B-B' MAP CALCULATED <br /> DERIVED <br />12 74565, 83668 (CI3) C-C' MAP CALCULATED <br /> DERIVED * <br /> <br />* <br /> <br />Reach 12 is Ii "Canyon" reach, but a map-derived cross-section was used there anyway. <br /> <br />4.4 <br /> <br />Computing: Flood Depths <br /> <br />Flood depths were calculated at each cross-section through a computer program (QANY) which <br />uses Manning's equation. The input parameters for the calculation of flow included: x and y <br />coordinates for points on the cross-section, Manning's 'n' values (Reference 11), the channel <br />slope (interpreted from USGS quadrangle maps), and depth values. The program calculated flow <br />and velocity values for each depth value entered. The target flow values were those values <br />established in Section 3.0 and shown on Table 3. Rating curves were established from the <br />calculated depths. From the rating curves 50-year and l00-year flood elevations were <br />established at each location. <br /> <br />18 <br />