Laserfiche WebLink
<br />'i)))t\3bB <br /> <br />. <br /> <br />PART vn. CALCULATION OF VIRGIN STREAMFLOW FOR CONFLUENCE <br />OF WEST. MIDDLE. AND EAST MANCOS RIVERS 1938-1951 <br /> <br />Period of Record <br />The common period of record for the three USGS gaging stations on the <br />West, Middle, and East Mancos rivers is 1938 through 1951, except for the follow- <br />ing: <br /> <br />1. No records are available for the West Mancos River during January <br /> <br /> <br />through April 1938. The missing data were estimated through use <br /> <br /> <br />of records for the Middle and East Mancos rivers for that period, <br /> <br /> <br />multiplied by the ratio of average West Mancos flow to the average <br /> <br /> <br />for the Middle and East Mancos. The West Mancos flows were <br /> <br /> <br />estimated to be the following (acre-feet): <br /> <br />1938 <br /> <br />January <br />110 <br /> <br />February <br />200 <br /> <br />March <br />820 <br /> <br />April <br />7,040 <br /> <br />. <br /> <br />2. No records are available for the Middle and East Mancos River during <br /> <br /> <br />October through December 1951. The missing data were estimated <br /> <br /> <br />through use of the West Mancos River records for that period, <br /> <br /> <br />multiplied by the ratio of average Middle and East Mancos flow <br /> <br />to the average for the West Mancos. The Middle and East Mancos <br /> <br /> <br />flows were estimated to be the following (acre-feet): <br /> <br />Middle Mancos <br />East Mancos <br /> <br />October <br />72 <br />110 <br /> <br />November <br />28 <br />55 <br /> <br />December <br />20 <br />60 <br /> <br />Histmical River Depletions <br /> <br /> <br />The historical flow at each gaging station during the period of record <br /> <br /> <br />was affected by upstream diversions for irrigation and municipal use by the <br /> <br /> <br />following ditches and municipal facilities: <br /> <br />. <br /> <br />-22- <br /> <br />,41, <br />