Site Index and Height Growth Curves for Managed, Even-aged Stands of White Or Grand Fir East of the Cascades in Oregon and Washington, Volúmenes246-260Collin D. Bevins, Donald L. Reukema, John Neisess, Kenneth W. Seidel, M. A. Radwan, P. H. Cochran, Paul E. Aho, R. Dennis Harr, Richard E. Miller Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1978 - 21 páginas |
Dentro del libro
Resultados 1-5 de 35
Página 1
... caused by complete clearcutting . Specifically , the objectives of this study are to determine increases in size of annual yield , seasonal yield , and peak streamflow after timber harvest . This report describes changes in streamflow ...
... caused by complete clearcutting . Specifically , the objectives of this study are to determine increases in size of annual yield , seasonal yield , and peak streamflow after timber harvest . This report describes changes in streamflow ...
Página 3
... caused by frontal activity is augmented by orographic precipitation when moist , unstable air masses move inland . Average daytime tempera- tures range from -0.5 ° to 1-5 ° C in winter and 15 ° -20 ° C in summer ( fig . 2 ) . Year ...
... caused by frontal activity is augmented by orographic precipitation when moist , unstable air masses move inland . Average daytime tempera- tures range from -0.5 ° to 1-5 ° C in winter and 15 ° -20 ° C in summer ( fig . 2 ) . Year ...
Página 5
... caused by treatment . Three pairs of watersheds were used in this study . Road Construction During the summer of 1970 , a system of permanent roads was constructed to provide access for logging ( fig . 1 ) . Roads have 5.5 - m - wide ...
... caused by treatment . Three pairs of watersheds were used in this study . Road Construction During the summer of 1970 , a system of permanent roads was constructed to provide access for logging ( fig . 1 ) . Roads have 5.5 - m - wide ...
Página 8
... increased annual yield in all three logged watersheds ( fig . 6 ) . Because hydrologic changes caused by timber Table 4 -- Summary of annual and seasonal streamflow relationships 8 CHANGES IN STREAMFLOW • 8 Annual Yield 8.
... increased annual yield in all three logged watersheds ( fig . 6 ) . Because hydrologic changes caused by timber Table 4 -- Summary of annual and seasonal streamflow relationships 8 CHANGES IN STREAMFLOW • 8 Annual Yield 8.
Página 9
... +10 --ROAD CONSTRUCTION-- --- TIMBER HARVEST --- 2 O -2 STREAMFLOW DEVIATION FROM PREDICTED ( IN ) +14 +12 བྷཱུ +10 +8 96 1 2 O -2 1964 1968 1972 1974 1976 WATER YEARS harvest cannot be separated from those caused by road building 9 18.
... +10 --ROAD CONSTRUCTION-- --- TIMBER HARVEST --- 2 O -2 STREAMFLOW DEVIATION FROM PREDICTED ( IN ) +14 +12 བྷཱུ +10 +8 96 1 2 O -2 1964 1968 1972 1974 1976 WATER YEARS harvest cannot be separated from those caused by road building 9 18.
Términos y frases comunes
100 largest trees 50 percent atrazine average basal area Blue Mountains board-foot breast-high age calibration Cascade Range clearcuts conifer dead tops decay density diameter Douglas-fir equations estimated Forest and Range Forest Service fuel load fuel model grand fir height growth curves illus inches increases lodgepole pine logging mineral soil mixed conifer mountain hemlock National Forest natural regeneration NFDRS number of trees Oreg Oregon Pacific Northwest Pacific Northwest Forest partial cut peak flow percent of roadless planted ponderosa pine Portland postlogging programed harvest Range Exp Range Experiment Station reallocation regression road roadless area withdrawn sample seed seedlings Siskiyou National Forest slope spacing species Stocking percent streamflow study area study Forests subplots timber base timber harvest top-kill treatment period trees per acre tussock moth U.S. Department Umatilla Umatilla National Forest USDA values variables volume Washington watershed western white or grand Willamette National Forest