Dendrochronological analysis of debris flow disturbance on Rishiri Island

Yoshida, Keiji; Kikuchi, Satoshi; Nakamura, Futoshi; Noda, Manjiro

doi:10.1016/s0169-555x(97)00010-x

Cited by 21 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recurrence intervals between debris fl ows can be decades to thousands of years for entire basins with many debris-fl ow sources (e.g., Orme, 1990;Yoshida et al, 1997;Harris and McDermid, 1998;Cerling et al, 1999;Eaton et al, 2003). Long-term recurrence intervals at landslide initiation sites are correspondingly greater, approaching many thousands of years near the tips of networks (e.g., Benda and Dunne, 1987;Reneau and Dietrich, 1991;Eaton et al, 2003).…”

Section: Rock Propertiesmentioning

confidence: 99%

Erosion of steepland valleys by debris flows

Stock

Dietrich

2006

Geological Society of America Bulletin

230

276

View full text Add to dashboard Cite

Episodic debris fl ows scour the rock beds of many steepland valleys. Along recent debris-fl ow runout paths in the western United States, we have observed evidence for bedrock lowering, primarily by the impact of large particles entrained in debris fl ows. This evidence may persist to the point at which debris-fl ow deposition occurs, commonly at slopes of less than ~0.03-0.10. We fi nd that debris-fl ow-scoured valleys have a topographic signature that is fundamentally different from that predicted by bedrock river-incision models. Much of this difference results from the fact that local valley slope shows a tendency to decrease abruptly downstream of tributaries that contribute throughgoing debris fl ows. The degree of weathering of valley fl oor bedrock may also decrease abruptly downstream of such junctions. On the basis of these observations, we hypothesize that valley slope is adjusted to the long-term frequency of debris fl ows, and that valleys scoured by debris fl ows should not be modeled using conventional bedrock river-incision laws. We use fi eld observations to justify one possible debris-fl ow incision model, whose lowering rate is proportional to the integral of solid inertial normal stresses from particle impacts along the fl ow and the number of upvalley debris-fl ow sources. The model predicts that increases in incision rate caused by increases in fl ow event frequency and length (as fl ows gain material) downvalley are balanced by rate reductions from reduced inertial normal stress at lower slopes, and stronger, less weathered bedrock. These adjustments lead to a spatially uniform lowering rate. Although the proposed expression leads to equilibrium long-profi les with the correct topographic signature, the crudeness with which the debris-fl ow dynamics are parameterized reveals that we are far from a validated debris-fl ow incision law. However, the vast extent of steepland valley networks above slopes of ~0.03-0.10 illustrates the need to understand debris-fl ow incision if we hope to understand the evolution of steep topography around the world. Figure 1. Debris-fl ow valley network in an Oregon Coast Range clear-cut. The combination of elevated water pressure during a 1996 storm and reduced root strength initiated landslides at valley heads that mobilized as debris fl ows, scouring sediment and the Eocene Tyee sandstone (white areas) along the runout. Road at top right indicates scale.

show abstract

Section: Rock Propertiesmentioning

confidence: 99%

Erosion of steepland valleys by debris flows

Stock

Dietrich

2006

Geological Society of America Bulletin

230

276

View full text Add to dashboard Cite

show abstract

“…Yoshida et al (1997), in Japan, used cross-dating techniques for dating trees living on ancient deposits and then buried by debris flows. Baumann and Kaiser (1999) dated some events, occurring since the end of the 15th century on a debris-flow fan in the Swiss Alps, analysing abrupt growth changes, impact scars and adventitious roots.…”

Section: Introduction and Aimsmentioning

confidence: 99%

Frequency of debris flows and their relation with precipitation: A case study in the Central Alps, Italy

Pelfini

Santilli

2008

Geomorphology

View full text Add to dashboard Cite

“…Avalanches are in most cases indicated by reaction wood and growth injuries. Only the dating of avalanches and to some extent also debris flows can use loads of dead wood (Yoshida et al, 1997;Reardon et al, 2008). From a conceptual point of view, the direct markers resulting from the impact of mass movements on trees record events immediately.…”

Section: Discussionmentioning

confidence: 99%

“…reacts by an apparent shortening of tree rings after burial by fine-grained material of 10 cm thickness and dies if it is covered by 1.6-1.9 m of material (Strunk, 1997). If burial exceeds a critical level, dead tree stumps can then be used to estimate the minimum age of an event (Yoshida et al, 1997).…”

Section: Tree Response To a Burial Event -Adventitious Tree Rootsmentioning

confidence: 99%

Meta-analysis of dendrochronological dating of mass movements

Tumajer

Treml

2012

Geochronometria

View full text Add to dashboard Cite

Absolute dating of mass movements is crucial for disentangling possible release factors and determining the frequency of events. Here, we present an overview of a recent approach to dendrochronological dating of rockfalls, flows, landslides and avalanches. The results, based on 69 casestudies, show that methodological approaches to sampling and material processing differ considerably for different types of mass movements. Landslides are usually detected through abrupt growth changes and changes in stem eccentricity, whereas high-energy events as avalanches and flows are mostly identified by the formation of traumatic resin ducts, reaction wood, growth injuries and eccentricity changes. Cross-dating of dead wood is applicable as well. The dating of most mass movements except landslides is common, even with sub-annual resolution. In comparison to other methods of absolute dating, the main benefit of dendrochronology still lies in the high temporal resolution of the results. If living material is accessible, on-going research progress makes absolute dating of most mass-wasting events possible with sub-annual precision.

show abstract

Dendrochronological analysis of debris flow disturbance on Rishiri Island

Cited by 21 publications

References 6 publications

Erosion of steepland valleys by debris flows

Erosion of steepland valleys by debris flows

Frequency of debris flows and their relation with precipitation: A case study in the Central Alps, Italy

Meta-analysis of dendrochronological dating of mass movements

Contact Info

Product

Resources

About