2 edition of Vegetation changes on seismic lines from recent (2000-2001) and historic (1970-1986) seismic programs in the Mackenzie Delta area found in the catalog.
Vegetation changes on seismic lines from recent (2000-2001) and historic (1970-1986) seismic programs in the Mackenzie Delta area
J. Todd Kemper
|Statement||J. Todd Kemper for Environmental Studies Research Funds.|
|Series||Environmental Studies Research Funds -- 159, Environmental Studies Research Funds report -- no. 159.|
|Contributions||Environmental Studies Research Funds (Canada)|
|The Physical Object|
|Pagination||iii, 26 p. :|
|Number of Pages||26|
Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic method requires a controlled seismic source of energy, such as dynamite or Tovex blast, a specialized air gun or a seismic vibrator, commonly known by the trademark name Vibroseis. A newcomer to the ﬁeld of seismic data processing needs to know the fundamental principles as well as common technical terms in their new ﬁeld. In this book, phrases in boldface denote where special terms or concepts are deﬁned or discussed. To comprehend each new term or concept, a reader should try to deﬁne the term in his or her own.
In the present study post-event, NDVI was used as a mask of vegetation and non-vegetation areas to eliminate vegetation change effects. Typically, vegetation has NDVI values in the range from to (Roettger, ). Therefore, the threshold of NDVI greater than was applied to separate vegetated from non-vegetated areas. Seismic line density was more than twice that of roads, rail lines, power lines and pipelines combined and accounted for 80% of all edges. Seismic lines have the potential to indirectly influence more forest than all these other types of linear forest clearings. Seismic lines consistently decreased the size of forest patches, and increased the.
Simply defined, seismic interpretation is the science (and art) of inferring the geology at some depth from the processed seismic record. While modern multichannel data have increased the quantity and quality of interpretable data, proper interpretation still requires that the interpreter draw upon his or her geological understanding to pick the most likely interpretation from the many. is NOW the most destructive year for wildfires in Califonia on record. The Butte County #campfire wildfire has currently burned , acres and only 20% contained in the month of November. The Camp Fire is now the most destructive in HISTORY and continues to burn rapidly. The Woolsey fire is a close second in.
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Vegetation changes on seismic lines from recent () and historic () seismic programs in the Mackenzie Delta area. Calgary, Alta.: Environmental Studies Research Funds,  (OCoLC) Material Type: Internet resource: Document Type: Book, Internet Resource: All Authors / Contributors.
Models explaining seismic line vegetation regeneration to a 3 m height over the 2 × 50 m plot (response variable) were developed from five different a priori candidate themes of variables. Individual themes represented similar factors that were hypothesized to affect forest recovery on seismic by: In west-central, wet seismic lines had lower vegetation height and less ground cover.
In north-western, seismic lines at higher elevations had lower vegetation height and lower lateral cover. Our models of vegetation growth predicted 1–2m growth in vegetation height on seismic lines between andbut external validation.
For proximal ecosystems outside of seismic lines, the height distribution of vegetation was also significantly different between more recently developed (‘younger’) seismic lines with medium widths (D =p-value seismic line widths (D Cited by: 2.
that are set systematically along pre-cut seismic lines. From the s until the s, seismic lines were created by bulldozers that removed all trees and shrubs along with varying amounts of topsoil and subsoil (Lee and Boutin ).
hese lines referred to as “conventional seismic lines”, were usually straight, CALGARY — Seismic lines used in energy exploration are a significant source of a highly potent greenhouse gas that hasn’t yet been taken into Canada’s national account, new. 3D-seismic technology has not been sufficiently developed to prevent significant damage to arctic tundra.
Detailed microtopographic transects across existing 3D-seismic trails show that there is compression of the tundra vegetation mat that is up to 20 cm.
These changes to microtopography within the track cause other changes to snow. "While disasters related to non-climate-change events (such as volcanoes, earthquakes, tsunamis) have not increased in frequency, those associated with climate change have tripled in.
Seismic lines fall into this category, and because tree seedlings grow slowly, the lines remain visible from space for decades.
With overkm of seismic lines in caribou habitat in Alberta’s Oil Sands Area, 4 they are an obvious focus for restoration. sites (one seismic line per site).
Methods • Field measurements. For every seismic line, a meter long transect and three 6-meter cross transects were sampled by a point-intercept strategy (Figure 4). At every sampling point, if vegetation hits a 5-meter measuring pole, the top height of vegetation was recorded. Coordinates of sampled.
This indicator measures cumulative linear disturbance in km/km2, in each terrestrial ecoregion of the NWT. The types of linear disturbances included are - seismic lines, roads and power lines.
This indicator, however, is most likely reporting on seismic lines, as they form the vast majority of the data used to calculate density. Seismic lines and fire scars in the Taiga Plains. “Seismic lines with vegetation heights less than metres facilitate movement by caribou predators,” says the institute’s report.
Human use is more complex. How climate change triggers earthquakes, tsunamis and volcanoes Hurricane Matthew’s recent rampage across the Caribbean and south-eastern US The bottom line. The goal of this research was to characterize the impact of invasive riparian vegetation on burn severity patterns and fluvial topographic change in an urban Mediterranean riverine system (Med-sys) after fire in San Diego, California.
We assessed standard post-fire metrics under urban conditions with non-native vegetation and utilized field observations to quantify vegetation and fluvial. This approach enabled us to observe—for the first time—the effects of low‐impact seismic lines (LIS; petroleum exploration corridors) on surface morphology and CH 4 emissions in a treed‐bog ecosystem in northern Alberta, Canada.
Through compaction, LIS lines were found to flatten the observed range in microtopographic elevation by 46 cm. New York Times Book Review Editors' Choice • A riveting narrative about the biggest earthquake in North American recorded history—the Alaska earthquake that demolished the city of Valdez and swept away the island village of Chenega—and the geologist who hunted for clues to explain how and why it took place.
At p.m. on Maa magnitude earthquake—the. Over the last two decades, the seismic industry has worked to reduce seismic line widths from conventional widths of 6 to 8 metres to current low-impact widths of metres and metres in.
Winter vehicle travel can cause long-lasting damage to the tundra, according to a new paper by University of Alaska Fairbanks researchers.
Scars from seismic surveys for oil and gas exploration in. This map shows areas of seismic risk from high (red) to low (grayish-green). The map is from a report (click here to download) on seismic design categories in Washington.
The map also shows potentially active faults from a separate report (click here to download). Earthquakes occur nearly every day in Washington. Most are too small to be felt or cause damage.
wells onto seismic lines. Since the seis-mic applications can be used to inter-pret multiple 2-D and 3-D seismic surveys, the lines of section can be defined along 2-D seismic lines, 3-D inlines and crosslines, or well locations and free map points.
Once an LOS has been defined with its references to wells, seismic lines. This indicates that about miles of disturbed trail remained inbased on a total length of about miles of original trails, both seismic lines and camp-move trails. Some of the trails have become troughs visible from the air.
Others show changes in the amount and type of tundra plants.Kizut MC43 Fuel Line for Earthquake E43 E43CE Auger MC43E MD43 Cultivator WE43 WE43E WE43CE Edger Primer Bulb Grommet Repower Kit Parts out of 5 stars 34 $Reviews: Search the world's most comprehensive index of full-text books.