Laserfiche WebLink
<br />~' <br /> <br />000653 <br /> <br />. <br /> <br /> <br />. <br /> <br />;' <br /> <br />~ <br /> <br />RICHARD D, LAMM <br />Governor <br />2158H <br /> <br />JERIS A. DANIELSON <br />Slate Engineer <br /> <br />OFFICE OF THE STATE ENGINEER <br />DIVISION OF WATER RESOURCES <br /> <br />1313 Sherman Street-Room 818 <br />Denver, Colorado 80203 <br />(303) 866-3581 <br />March I, 1984 <br /> <br />~f~~filJ(\t?m <br />ti MAIl 1 1984'j~ <br /> <br />DlPMI.lifJ/r If nAlilw RW'J~~ES <br /> <br />MEMJRANDIJM <br /> <br />TO: <br />FROM: <br /> <br />David Getches, Executive Director, Department ~/\ N::~:~~es <br />Jeris A. Danielson, State Engineer ~. ~ ~ <br /> <br />SUBJECT: The Effect of Timber Cutting on Water Yield <br /> <br />Attached to this memo is an analysis by my staff of recent research and <br />technical publications dealing with the above subject. This analysis was <br />performed at your request and was conducted to determine the validity of <br />claims of the Forest Service in the Land and Resource Management Plans for the <br />Grand Mesa, Uncompahgre, and Gunnison National Forests and the San Juan <br />National Forest. <br /> <br />The analysis contains our conclusions as well as an appendix which summari~es <br />the findings of the 34 research and technical publications utili~ed in our <br />review. <br /> <br />Basically, it appears that timber cutting does in fact increase runoff, how- <br />ever, it is very difficult to quantify the amount or timing of the additional <br />runoff other than to expect it to increase. However, as the watershed is <br />reforested, the water yield will decline as evapotranspiration demands of the <br />vegetation increase. <br /> <br />JAD/HDS:ma <br /> <br />Attachment <br />