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Last modified
1/26/2010 10:50:38 AM
Creation date
10/9/2006 2:15:32 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8283.200
Description
Colorado River Basin-Colorado River Computer Models-Colorado River Decision Support System
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
5/30/1995
Author
Markus L Ritsch
Title
Yampa Phase IIb-Calibration Log-May-July 1995
Water Supply Pro - Doc Type
Report/Study
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<br />001077 <br /> <br />. 06-13-95 Increased the proration factors above Lester Creek reservoir and <br />Steamboat Lake. Initially Lester Creek was 0.042 and is now at 0,116, <br />Initially Steamboat Lake was 0.318 and is now at 0,668. During the <br />simulation neither Lester Creek nor Steamboat Lake was able to fill due to <br />lack of inflow. <br /> <br />_ ___ _._0.6=13=953~oticed.Elkhead.stay:ed.full_during_the_entireo study_period_19..15 <br />through 1991 except in 1990-1991. Talked to George Fosha who said they <br />drained Elkhead to work on the outlet during this period. The depletion for <br />this work was voluntary from all accounts. Set up the operations file to drain <br />all accounts to meet the target in 1990-1991. The three accounts will drain <br />the conservation pool first, the municipal pool second, and the Colorado <br />Utilities pool last. <br /> <br />. 06-14-95 Noticed that the WILLIAMS PARK DITCH, 570623, was getting <br />shorted numerous times during the simulation and that its constrained demand <br />was less than its decree. The constrained demand in this case was being set by <br />the physical capacity which was 10 cfs, Changed the ,dds file to make the <br />physical capacity match the decreed amount of 14.70 cfs. <br /> <br />. 06-14-95 Also at WILLIAMS PARK DITCH, 570623, in July 1983, it had <br />an historical gaged diversion of 1845 ACFr and during the simulation they <br />were limited to their decree amount of 904 ACFr. This difference of 941 <br />ACFr will affect the calibration, <br /> <br />. 06-14-95 Noticed that the HAUGHEY IRR DITCH, 440647, on <br />Fortification Creek has historical gaged diversions (JUN 1978520 ACFr, <br />JUL 19821983 492ACFr, JUN 1991 859 ACFr, MAY 1991523 ACFr)in <br />excess of the decreed value (470 and 486 ACFr) and during the simulation <br />this structure was limited by its decree amount. This affects the calibration at <br />the USGS gage 09246920. <br /> <br />. 06-14-95 Noticed that the DRY COTIONWOOD DITCH, 440998, on <br />Fortification Creek had a physical capacity of 5 cfs. Modified the physical <br />capacity in the .dds file to be 9.0 cfs which corresponds to the decree amount. <br /> <br />. 06-14-95 I noticed that at reservoirs, statemod first tries to meet targets, and <br />after it meets targets, the evaporation is calculated and deducted, The <br />difference due to evaporation then shows up in the comparison files. In other <br />words, the error at a gage blow a reservoir consists partly of the evaporation <br />from upstream reservoirs, <br /> <br />. 06-14-95 Changed the physical capacity in the ,dds file to match the decree <br />amount at the following structures: (units are in CFS) <br />
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