Laserfiche WebLink
<br />I <br /> <br />I <br /> <br /> Table 8 <br />Routing Reach Parameters (.\Iost Upstream Point 10 l\lcPhee Resen:oir) <br />Reach Length Upstream Do~'nstream Upstream Downstream Slope <br />Subbasin and Subbasin and Elevation Elevation <br />rD. (mi) Junclion Name or tI Junction Name or # (n) (n) (fVmi) <br /> Dolores Ueadwalers Dolores Upper Mid & <br />R620 10.5 Bear Creek 8~20 7920 47.8 <br /> Dolores below Rico. JR630 <br /> Dolores Upper Mid & West Fork Dolores & <br />R630 11.3 Bear Creek Dolores Mid 7920 7360 49.7 <br /> JR630 JR810 <br /> West Fork Dolores & Dolores Lower <br />R810 ]4.6 Dolores Mid 7360 6950 28.1 <br /> JR810 Dolores at Dolores <br /> Dolores Lower Dolores Out &Losl <br />R780 3.9 Canyon Creek OUI 6950 6920 7.7 <br /> Dolores at Dolores. JR800 <br /> Lost Canyon Creek Dolores Out &Losl <br />R760 ]A Canyon Creek Oul 7030 6920 32.7 <br />Lost Canyon Creek near JR800 <br /> Dolores. <br /> OoloTes Out & Lost Dolores Lower out <br />.800 0.. Canyon Creek Out 6920 6890 75.1 <br /> JR800 McPhee In <br />*Gaged locations <br />Lenglh The length (mi) of the reach from an upstreamjunetion to a downstreamjunetion. <br />Junctions Are points of reference, and represent confluence of roulmg reaches and subbasins. <br />Elevation This is the c1e\'alion oflhe reach at the junction point. <br />Slope Slope is calculated as (upstream elevation. dtmnstream elevation) I reach length in mites <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />The Muskingum method was used in the 1976 BEC-I model to reproduce the 1970 flood <br /> <br />I <br /> <br />event. The routing parameters for each channel routing reach are: Muskingum X, Muskingum K, <br /> <br />and thc number of sub-rcachcs. Muskingum X is a \veighting factor bctween 0.0 and 0.5. Thc <br /> <br />I <br /> <br />Muskingum X ofOA used for the BEe model was also used lor the Hl\IS modcl. Muskingum K, <br /> <br />I <br /> <br />thc travel time in hours for each routing reach. is the routing reach length (in miles) divided by the <br /> <br />velocity (miles per hour). The 1Il\.fS model used to reproduce the 1970 flood event took into <br /> <br />I <br /> <br />considcration an approximale time ofpcak at Ihe Rico gage and how much later thc pcak !low <br /> <br />I <br /> <br />was observed at the Dolores gage. From the time difference and length of the channel between <br /> <br />the Rico and Dolores gages. a channel velocity of 5.0 miles per hour was estimated for use in the <br /> <br />I <br /> <br />2\ <br /> <br />I <br />