Laserfiche WebLink
<br />Memorandum <br /> <br />To: <br /> <br />CC: <br /> <br />Biology Committee and Interested Parties <br />Yampa Management Team <br />Ray Tenney <br />November 17, 1998 <br /> <br />From: <br /> <br />Date: <br />Subject: <br /> <br />Yampa River Basin Hydrology Analyses <br /> <br />There have been many analyses of Yampa River Basin hydrology conducted since the <br />implementation of the Recovery Program (RIP). All of these efforts have relied on <br />available records and monthly time step computer models. No daily computer models <br />exist or are contemplated in the near future for the Yampa River basin. Should a daily <br />model be developed much of the input of historic diversions, etc would have to be <br />synthesized. <br /> <br />Most of the analyses have focused on the gage at Maybell. At 64 years, this gage has <br />the longest continuous record in the lower part of the Yampa River. It also has the <br />best rating section for low flow conditions. In comparison, Deerlodge Park only had <br />12 years of record prior to the relocation of the gage in 1997. At the old gage site fine <br />sediment often caused potential error in the low flow record. <br /> <br />The hydrology prepared for information of the Biology Committee in the <br />consideration of whether augmentation should be provided in August, September and <br />October includes: <br /> <br />Discussion of historic hydrologic conditions contained in Modde, et al. <br /> <br />Yampa River Colorado River Decision Support System Model (CRDSS) <br /> <br />Monthly time step model <br /> <br />Functions on a data base that includes the period of record of 1974 to <br />1991 <br /> <br />Developed and operated by the State of Colorado (CWCB) <br /> <br />Functions as if the river is under water rights administration <br />