2 edition of Effects of forest roads on surface and subsurface flow in southeast Alaska found in the catalog.
Effects of forest roads on surface and subsurface flow in southeast Alaska
Katherine E. McGee
|Statement||by Katherine E. McGee.|
|The Physical Object|
|Pagination||66 leaves, bound :|
|Number of Pages||66|
(a) Section 14(i)(1) of the National Forest Management Act of (16 U.S.C. a(i)(1)), is amended by striking the following: ‘road: Provided, That the provisions of this subsection shall not apply to sales of timber on National Forest System lands in the State of Alaska.’ and inserting in lieu thereof ‘road.’. Roads and skid trails generate overland flow, whereas a road cut can convert subsurface flow to surface runoff (Megahan, ). More evident effects of logging practices are anticipated in snow-dominated areas, where forest logging affects the amount and rate of snowmelt and the resulting runoff (Harr, , Berris and Harr, ).
Research consistently has shown that roads have the greatest effect of all practices associated with forest management on both surface and mass erosion. A large body of research shows, however, that much of the erosional impact of roads is manageable through proper land-use planning, location, design, construction, maintenance, and road closure. The U.S. Forest Service is taking comments on a proposal that would exempt the country's largest national forest, in southeast Alaska, from a ban on timber harvests and road building in roadless.
PHYSICAL HYDROLOGY AND THE EFFECTS OF FOREST HARVESTING IN THE PACIFIC NORTHWEST: A REVIEW loss is greater in summer than winter (Rothacher, ). Interception by a forest canopy not only reduces the total amount of water reaching the ground surface but also reduces peak throughfall intensities (Keim and Skaugset, ). On an annual. The large majority of roads that are located in towns of Southeast Alaska and that connect villages on the same island were originally constructed by the Forest Service for timber sale purposes. Along with basic transportation uses, Forest roads are used by recreationists, subsistence users, outfitters and guides.
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Well water levels and ditch flow were used to evaluate road-induced changes in surface and subsurface flow for two sites (Trocadero and Polk) in southeast Alaska. At the Trocadero Site, low water levels before and peak water levels during a storm were used to test for differences in subsurface water levels above and below an existing by: 3.
Effects of forest roads on surface and subsurface flow in southeast Alaska. Abstract. Graduation date: Well water levels and ditch flow were used to evaluate road-induced changes in\ud surface and subsurface flow for two sites (Trocadero and Polk) in southeast Alaska.
At\ud the Trocadero Site, low water levels before and peak water. This report presents five case study site investigations of road effects on groundwater levels. Levels were measured by both electronic and hand methods in accordance with methods and equipment discussed in the companion document in this series entitled, "A Monitoring System for Measuring Effects of Roads on Groundwater: Equipment and Installation".
EFFECTS OF FOREST ROADS ON SURFACE AND SUBSURFACE FLOW iN SOUTHEAST ALASKA. By Robert L. Beschta and Katherine E. Mcgee. Abstract. Well water levels and ditch flow were used to evaluate road-induced changes in surface and subsurface flow for two sites (Trocadero and Polk) in southeast Alaska.
At the Trocadero Site, low water levels before and Author: Robert L. Beschta and Katherine E. Mcgee. EFFECTS OF FOREST ROADS ON SURFACE AND SUBSURFACE FLOW iN SOUTHEAST ALASKA by Katherine E.
McGee A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the degree of Master of Science Presented Janu Commencement June A sampling protocol that worked well for the forest roads in southeast Alaska and can be adapted for use in other regions also is described.
sediment-laden surface flow from roads. aEnvironmental Science, University of Alaska Southeast, Juneau, AKUSA Effects of forest roads on surface and subsurface flow in southeast Alaska. MS thesis, Oregon State University, Corvallis, OR. 66 pp. Type Confirmed Hypothesized Ephemeral, Surface Flow (4) (4) Intermittent, Subsurface Flow (2) (1) Council on Forest Engineering (COFE) Conference Proceedings: "A.
Wrangell Island is located in central southeast Alaska in the Tongass National Forest. The climate is similar to that of the Greens Creek study site with precipitation and temperatures of about 2, mm/yr and to 27 °C.
The soils and vegetation at this site are commonly referred to as “muskeg” in southeast Alaska. Most roads in southeast Alaska, where this method was developed, are crowned with a ditch on the uphill side.
The crown of the road acts as a surface drainage divide, which results in half of the road contributing runoff to the inside ditch (fig. The main controller and data collector for each of the sample sites consists of a data. Survey Boundaries maintained by the US Forest Service.
ESRI geodatabase (78MB) shape file (MB) Date of last refresh: metadata map service Surface Management Agency (SMA) lines represent the surveyed boundary lines for which the Forest Service is responsible for marking and posting.
Southeast Alaska. More bald eagles reside here than any other place in the world. The Tongass National Forest, the nation’s largest forest, comprises the bulk of Southeast’s Federal lands, with 17 million acres of forest, mountains, alpine meadows, lakes, streams, muskegs, and.
A Stunning Rainforest In Alaska, Tongass National Forest Is The Largest In The U.S. Picture this: 17 million acres of huge trees, temperate rainforest, jolting fjords, booming waterfalls, steep mountain peaks, fascinating amounts of wildlife, glistening glaciers and some of the rarest types of flora and fauna in the world.
The State's third and newest forest includes ab acres of land located in central and southern southeast Alaska. Many of the Forest's 32 management units are on Prince of Wales Island. Other units are located on Dall, Gravina, Heceta, Kosciusko, Kuiu, Mitkof, Revillagigedo, Suemez, Tuxekan, and Wrangell islands.
Southeast Alaska lies at the heart of the North American temperate rainforest — a forest that extends in a narrow 2,mile coastal strip from northern California, along coastal British Columbia, and to the eastern edge of the Kodiak archipelago in southcentral Alaska.
Temperate rainforests are cooler, though just as wet as. 2 Southeast Alaska Conservation Assessment, Executive Summary the region’s forest products industry. As in other areas in the world, timber harvest in Southeast focused first on the most accessible and highest-quality timber lands of the region and created an expansive network of more than 5, mi (8, km) of logging roads.
These. subsurface flow and surface run-off. (The natural hydrologic function of a forest does not recover for years or more); The removal of the forest canopy eliminates a partial "umbrella" that intercepts some rain and disperses the effects of intense storm events; Dragging logs across steep slopes and using heavy machinery damages the soil surface.
Seward, in south-central Alaska, was one of the towns most devastated by the Alaska earthquake of Ma The greater part of Seward is built on an alluvial fan-delta near the head of Resurrection Bay on the southeast coast of the Kenai Peninsula.
Natural gaps in the forest occur in southeast Alaska when heavy winds topple shallow-rooted trees. Natural gaps the size of a acre clearcut are rare. The unique geography and unusually wet climate of the Tongass have given rise to a complex and diverse mix of habitat types - ocean, ice, forests, scrubland, and wetlands.
Southeast Alaska Watershed Coalition; Prince of Wales Project Planning Workshop and vertically between surface and subsurface flows. Provide important ecosystem services, such as high-water quality, the recharge of streams and aquifers, the maintenance of riparian communities, and the moderation of climate variability change.
For steeper gradesand where road cuts intercept subsurface flow, inside ditches and culvertsare the standpoint of water quality, inside ditches should be avoided whenever its very nature, the ditchlineis a man-made gully which must be disturbed by cleaning to maintainmore water is collected in a ditch.Skaugset, A., Swall, S., and Martin, K.
() The effect of forest road location, construction, and drainage standards on road-related landslides in western Oregon associated with the February storm. Proceedings of the Pacific Northwest Floods of February Water Issues Conference, October 7–8, Portland, Oregon (pp.
–The Tongass National Forest (Tongass) contains the largest concentration of disso- lution caves known in the State of Alaska (Baichtal b, ~). The Tongass also contains world-class karst features, particularly surface or epikarst in the alpine and subalpine zones (Aley and others ).
Epikarst refers to the saturated zones within.