Forest vegetation removal and slope stability in the Idaho Batholith /

Gray, Donald H.; Megahan, Walter F.

doi:10.5962/bhl.title.68699

Cited by 88 publications

(64 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Failure becomes more likely upon saturation, often in more prolonged storms and snowmelt (e.g., Reneau and Dietrich, 1987;Gray and Megahan, 1981;Montgomery et al, 2000). In the Payette River and surrounding region, landslides were most common 4-10 years after burning or deforestation (Gray and Megahan, 1981).…”

Section: Postfire Erosion and Deposition: Processes And Patternsmentioning

confidence: 99%

“…Although infiltration rates are typically high in unburned areas, postfire surface runoff is greatly enhanced and can readily erode the cohesionless grussy colluvium (Megahan and Molitor, 1975;Robichaud, 2000). Thick colluvium in slope hollows is also prone to landsliding after fires, when tree roots decay and the associated cohesive strength in colluvium is lost (Gray and Megahan, 1981;Clayton and Megahan, 1986;Schmidt et al, 2001).…”

Section: Payette River Study Areamentioning

confidence: 99%

See 1 more Smart Citation

Climatic controls on fire-induced sediment pulses in Yellowstone National Park and central Idaho: a long-term perspective

Meyer

Pierce

2003

Forest Ecology and Management

108

View full text Add to dashboard Cite

Fire management addressing postfire erosion and aquatic ecosystems tends to focus on short-term effects persisting up to about a decade after fire. A longer perspective is important in understanding natural variability in postfire erosion and sedimentation, the role of these processes in structuring habitat, and future expectations in light of a warming climate and environmental change. In cool high-elevation forests of northern Yellowstone National Park, stand ages indicate infrequent large stand-replacing fires. In warmer low-elevation forests of the Payette River region of Idaho, fire-scarred tree-rings record frequent low-severity fires before 1900; stand-replacing fires and resulting debris flows in recent decades are usually attributed to 20th-century fire suppression, grazing, and other land uses. In both areas, however, tree-ring records extend back only about 500 years. We use 14 C-dated geologic records to examine spatial and temporal patterns of fire-induced sedimentation and its relation to climate over the last 10 000 years. We review sedimentation processes in modern postfire events, which vary in magnitude and impact on stream systems depending on burn severity, basin geomorphology, and the timing and characteristics of postfire storms. Modern deposits also provide analogs for identification of fire-related deposits in alluvial fans. In Yellowstone, episodes of fire-induced sedimentation occurred at intervals of about 300-450 years during the last 3500 years, indicating a regime of infrequent high-severity fires. Millennial-scale variations in the fire-sedimentation record appear to relate to hemispheric-scale climatic change. Fire-related sedimentation is rare in Yellowstone during cooler episodes (e.g., the Little Ice Age $1200-1900 A.D.), probably because effectively wetter conditions prevented most fires from spreading. During some of the same cool periods, the Payette region experienced light surface fires and frequent, small pulses of fire-induced sediment. Between 900 and 1200 A.D., however, large fire-related debris flows occurred in both study areas, coincident with the Medieval Warm Period. During that time, drought may have limited grass growth in xeric Payette-region forests, restricting surface fire spread and allowing understory shrubs and trees to create ladder fuels. Although fire suppression and land-use effects are clearly involved in recent catastrophic fires in the Payette region, a warming climate and severe drought are probable contributors to major stand-replacing fires and postfire sedimentation, both past and present. Restoration and maintenance of conditions prior to European settlement may be unrealistic because of the potent influence of climate, and the incidence of severe fires will likely increase in both areas with future warming. #

show abstract

Section: Postfire Erosion and Deposition: Processes And Patternsmentioning

confidence: 99%

Section: Payette River Study Areamentioning

confidence: 99%

Climatic controls on fire-induced sediment pulses in Yellowstone National Park and central Idaho: a long-term perspective

Meyer

Pierce

2003

Forest Ecology and Management

108

View full text Add to dashboard Cite

show abstract

“…The modified shelterwood prescription also left these shelter trees in place for 60 to 90 yr. At this future time, the large trees are cut leaving the number, size, spacing, and crown ratio of large trees the same as specified for the initial harvest. The purpose of this modified shelterwood prescription was to ensure sufficient root mass for mechanically reinforcing and buttressing the soil against shallow landslide occurrence (Gray and Megahan, 1981).…”

Section: Resource Planning In a Rural Areamentioning

confidence: 99%

Solving the dilemma of transforming landslide hazard maps into effective policy and regulations

DeGraff

2012

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. As geoscientists, we often perceive the production of a map or model to adequately define landslide hazard for an area as the answer or end point for reducing risk to people and property. In reality, the risk to people and property remains pretty much the same as it did before the map existed. Real landslide risk reduction takes place when the activities and populations at risk are changed so the consequences of a landslide event results in lower losses. Commonly, this takes place by translating the information embodied in the landslide hazard map into some change in policy and regulation applying to the affected area. This is where the dilemma arises. Scientific information generally has qualifications, gradations, and conditions associated with it. Regulations are necessarily written in language that tries to avoid any need for interpretation. Effectively incorporating geologic information into regulations and ordinances requires continued involvement with their development and implementation. Unless geoscientists are willing to participate in that process, sustainable risk reduction is unlikely to occur.

show abstract

“…In literature landslides are reported to occur much more frequent (with a maximum up to 350 times) than in virgin forests (Gray and Megahan, 1981;Amaranthus et al, 1985;Larsen and Parks (1997). In future work, the road condition (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Based on a comprehensive survey in the tropics, rate of landslide disturbance is increased from 5 to 8 times in a 170 m wide swath along road corridors (Larsen and Parks, 1997). Other studies reported an 25 to 350 times increase in landslides in forests with small roads compared to pristine forests (Gray and Megahan, 1981;Amaranthus et al, 1985). Documenting landslides provides fundamental information on the landslideprocesses, which is very useful for reducing landslide hazards and risk (Corominas and Moya, 2008).…”

Section: Background and Motivationmentioning

confidence: 99%

Airborne laser scanning : for forested landslides investigation in temperate and tropical invironments

Razak¹

View full text Add to dashboard Cite

Forest vegetation removal and slope stability in the Idaho Batholith /

Cited by 88 publications

References 11 publications

Climatic controls on fire-induced sediment pulses in Yellowstone National Park and central Idaho: a long-term perspective

Climatic controls on fire-induced sediment pulses in Yellowstone National Park and central Idaho: a long-term perspective

Solving the dilemma of transforming landslide hazard maps into effective policy and regulations

Airborne laser scanning : for forested landslides investigation in temperate and tropical invironments

Contact Info

Product

Resources

About