2 edition of Reducing sedimentation risks in Southeast Alaska through the use of aerial logging systems found in the catalog.
Reducing sedimentation risks in Southeast Alaska through the use of aerial logging systems
Kenneth John Faulk
Written in English
|Statement||by Kenneth John Faulk.|
|The Physical Object|
|Pagination||35 leaves, bound :|
|Number of Pages||35|
The Kenai River is the most important freshwater fishery in Alaska. The flow regime is characterized by high summer flow of glacial meltwater and periodic flooding caused by sudden releases of glacier-dammed lakes in the headwaters. Every part of the stream is a known or potential salmon-spawning site. The stream channel is underfit, attributed to regional glacial . construction site discharges to municipal separate storm sewer systems. The sediment and erosion control practice inventory will be combined with information generated under the the risk of environmental damage due to erosion and sedimentation. Site plans should be water has less chance to drain through the soil between storms. The soil.
• Determine the major sediment-related problems and issues facing the United States in the 21st century. • Coordinate the development of countermeasures to reduce sediment . Erosion and Sediment Control Policies Erosion and sedimentation are natural processes whereby soil materials are detached and transported from one location and deposited in another, primarily due to rainfall and runoff. Accelerated erosion and sedimentation can occur in conjunction with highway and transportation facility construction. This.
southeast Alaska, but the great majority develop as debris avalanches and debris flows involving the rapid downslope movement of a mixture of soil, rock, and forest litter with relatively high water content (Swanston ) (fig. 2). A Figure 2. --Recent debris avalanches and debris flows in southeastern Alaska: A, Debris avalanche-. different SDR’s. Each erosion source is multiplied by its SDR to get the sediment yield from that source. Other methods used to estimate sediment delivery include sediment surveys, stream sediment gages, and predictive equations. NEH Section 3 Sedimentation (Chapter 6 & 7) and T. R. 32 & 55 contain further information on sediment delivery.
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Controlling sediment and erosion problems are critical to an effective storm water pollution prevention plan, or SWPPP. In addition, controlling runoff water helps to reduce erosion and sediment problems and ultimately reduces the environmental impact of a project.
Best management for soil and erosion control during construction are outlined in the U.S. EPA's. southeast Alaska. The gradients and velocities were much lower, the flows more constant, and the sediment load finer than in Alaskan streams. and sediment transport remain the same for all streams, quantitative results obtained in these other areas cannot be applied directly to conditions in southeast Alaska.
sedimentation, and the management practices that protect the functions that urban societies demand from soil. This technical note will focus on soil erosion and sedimentation from construction sites.
Off site damage from sediment is the most critical problem facing construction sites. Erosion, which produces this sediment, isFile Size: 45KB. Hydrogemorphic linkages related to sediment transport in headwater streams following basin wide clear-cut logging on Prince of Wales Island, southeast Alaska, were investigated.
Source to sink evaluation of sediment routing in the Gulf of Alaska and Southeast Alaska: A thermochronometric perspective Catherine A. Dunn 1, Eva Enkelmann, Kenneth D.
Ridgway2, and Wai K. Allen2 1DepartmentofGeology,UniversityofCincinnati,Cincinnati,Ohio,USA,2DepartmentofEarth,Atmospheric,andPlanetary Cited by: 5. EPA works with local, state and tribal governments to reduce runoff and improve water quality by minimizing the introduction of sediment into rivers, lakes and streams.
Climate changes, such as more frequent and intense rain events, can increase erosion and result in greater amounts of sediment washing into rivers, lakes and streams.
Suspended sediment, the kind of sediment that is moved in the water itself, is measured by collecting bottles of water and sending them to a lab to determine the concentration. Because the amount of sediment a river can transport changes over time, hydrologists take measurements and samples as streamflow goes up and down during a storm.
The approach taken in this special study to evaluate and assess potential sedimentation impacts can be applied to other lagoon and estuarine systems.
Aerial imagery analysis as well as sediment core dating may be useful separately or together in a variety of regulatory contexts: as part of a special study, to gain evidence to support TMDL.
In southeast Alaska these failures typically are rapid in shallow soils (b2 m.) and on high angle (N 30°) slopes (Johnson et al., ); slow moving, deep seated earthflows are very rare because. The physics of the most common sedimentation process, the settling of solid particles from fluids, has long been known.
The settling velocity equation formulated in by G.G. Stokes is the classic starting point for any discussion of the sedimentation process. Stokes showed that the terminal settling velocity of spheres in a fluid was inversely proportional to the fluid’s.
The Alaska Baseline Erosion Assessment is a result of study efforts specifically authorized and funded by Congress. The purpose of this study has been to coordinate, plan and prioritize appropriate responses to erosion in Alaska.
Full text of "Wind in the Forests of Southeast Alaska and Guides for Reducing Damage" See other formats United States ij Department of / Agriculture YY Forest Service Pacific Northwest Research Station General Technical Report PNW-GTR July Wind in thie Forests of Southeast Alaska and Guides for Reducing Damage Author A.S.
HARRIS is a research. Sediment deposits in rivers can alter the flow of water and reduce water depth, which makes navigation and recreational use more difficult. Sediment is the loose sand, clay, silt and other soil particles that settle at the bottom of a body of water. Sediment can come from soil erosion or from the decomposition of plants and animals.
The geology of Alaska includes Precambrian igneous and metamorphic rocks formed in offshore terranes and added to the western margin of North America from the Paleozoic through modern times.
The region was submerged for much of the Paleozoic and Mesozoic and formed extensive oil and gas reserves due to tectonic activity in the Arctic Ocean. Alaska was largely ice free. The sediment mass eroded from the general harvest area ( ± (SE) g) was ~times greater than the sediment collected in the riparian buffer ( ±.
retreat or land uplift (Harris and FarrRuth and Harris ). In southeast Alaska, intensive logging since the s has increased the amount of alder, particularly in upland areas where heavy soil disturbance resulted from tractor logging and high-lead cable operations.
Red alder can reproduce by seed or can sprout vigorously from the. Sedimentation is one of several methods for application prior to filtration: other options include dissolved air flotation and some methods of filtration.
Generically, such solids-liquid separation processes are sometimes referred to as clarification processes. There is a variety of methods for applying sedimentation and include: horizontal flow, radial flow, inclined plate.
Introduction. In addition to emissions of heat-trapping greenhouse gases from energy, industrial, agricultural, and other activities, humans also affect climate through changes in land use (activities taking place on land, like growing food, cutting trees, or building cities) and land cover (the physical characteristics of the land surface, including grain crops, trees, or concrete).
10. Southeast Alaska was not always the rainforest that it is today. Evidence of erosion and deposition by glaciers can be seen almost everywhere. The smooth, polished coastline of Lynn Cannel (below at left) is a result of glacial erosion, as are the striations (scratches) on this boulder near El Capitan Cave on Prince of Wales Island (below at.
What Is Sediment. Sediment is fine-grained particles like silt and clay, generally occurring as a result of soil erosion. As rainfall washes away bare soil or a stream erodes a muddy bank, sediment makes it into waterways. These fine particles occur naturally in the environment, but problems arise when they enter aquatic systems in larger quantities than.
Among the many goals of contemporary forest regulation, reducing riparian disturbance and reducing sediment delivery may be the two most often in conflict. While flying logs or even stringing cable through a riparian corridor may be discouraged as unacceptable disturbance of the riparian corridor, the alternative of building more roads (with.Oblique Aerial Photography of the Arctic Coast of Alaska, Nulavik to Demarcation Point, AugustThe Arctic Coastal Plain of northern Alaska, an area of strategic economic importance to the United States, is home to remote Native American communities and encompasses unique habitats of global significance.
Onsite Disposal Systems. Onsite disposal systems (OSDS), called septic systems, are widely used in installation and care of these onsite systems by homeowners and contractors is essential to maintaining the health of the system, public health and Alaska's environment.