A CONCEPTUAL MODEL OF SOIL MASS MOVEMENT, SURFACE ...
triggered by debris dam failure or by mass movement from a hillslope. The model will be ... erosion occurs as a direct result of the exposure of bare mineral soil ..... d ecos Sy + Lw' cos. + r dcosdy7 tangy'. FS. = W sin + (Yw sin R M Z dx d. Solving for the factor of safety yields: M Z dx dy] cos2 S tangy ' + r dx dy tangy. U dx dy...Read More
Numerical modelling of the climate control on hillslope erosion
ainsi qu'avec des taux d'érosion estimés indépendamment sur base de concentrations en isotopes .... In hilly and mountainous regions, long-term downslope movement of soil on hillslopes can play a crucial role governing the rate at which landscape evolves through time. Indeed, hillslopes ..... mineral soils (Hillel, 1980).Read More
Slope Processes, Mass Movement and Soil Erosion - ScienceDirect ...
This paper reviews slope processes associated with mass movement and soil erosion and contributory factors, including physical and human agents. ...... the Brazilian Research Council (CNPq). REFERENCES. Abrahams A D. 1986. Hillslope Processes. Allen and Unwin, Lo- ndon. Agnihotri P, Kumar A. 2015. Green house...Read More
Mass Movements - Tulane University
Oct 29, 2015 ... Mass movements (also called mass-wasting) is the down-slope movement of Regolith (loose uncemented mixture of soil and rock particles that covers the Earth's surface) by the force of gravity without the aid of a .... Solifluction produces distinctive lobes on hill slopes (see figure 16.2d) in your text).Read More
The Hydraulics of Overland Flow On Hillslopes
The Hydraulics of. Overland Flow. On Hillslopes. GEOLOGICAL SURVEY PROFESSIONAL PAPER 662-A .... C. Chezy coefficient, C=(8g/ff)^, in feet*- per second. D. Average depth in feet. F. Infiltration rate in inches per hour. I. Rainfall intensity in inches per hour. K. Coefficient of ..... for both the mineral and organic content.Read More
Numerical analyses of subsurface flow in a steep hillslope under ...
Jul 26, 2007 ... Realistic features of the spatially variable formation parameters and the precipitation data are incorporated into the simulation model. It is found that spatial heterogeneity has a significant impact on the movement of water in the hillslope and the streamflow generation. In particular, the heterogeneous...Read More
A 1-D mechanistic model for the evolution of earthflow-prone hillslopes
Nov 12, 2011 ... Ahnert [1977, 1987] included a plastic flow term in numerical models to simulate slow mass movements if a threshold was exceeded, and Kirkby  also developed a one-dimensional model for hillslope evolution including landsliding. Notably and more recently, Densmore et al.  created a...Read More
Landslide erosion controlled by hillslope material | Nature Geoscience
Feb 28, 2010 ... 5b–d). The limiting factor of soil thickness indicates soil landslides on soil-mantled hillslopes characterized by γ<1.3 are transport-limited in the short-term if detaching less than the maximum soil .... Blaschke, P., Trustrum, N. & Hicks, D. Impacts of mass movement erosion on land productivity: A review . Prog...Read More
Silt fences: an economical technique for measuring hillslope soil ...
versatile; various plot sizes can be used to measure hillslope erosion in different settings and to determine effectiveness of various .... initiate and sustain the movement of soil particles can be from many sources, such as .... (a) log barrier, (b) sheet metal, (c) hand trench, and (d) existing inslope road. Contributing Area.Read More
A review of the evolving perceptual model of hillslope flowpaths at ...
to be the indicator of subsurface flow timing and magnitude for several published studies at Maimai, subsequent whole hillslope .... horizon, and a moderately thick, very friable mineral ... Comparison of hydrograph response from the throughflow pits (1±6), zero-order stream sites (A±D) and at the M8 main weir as shown.Read More
Geomorphic controls on mineral weathering, elemental transport ...
Oct 6, 2016 ... cycling, and production of mineral surface area in a schist bedrock weathering profile, Piedmont ... Research Center, especially D. Montgomery, S. Hicks, S. Dix and J. Matkov for assistance with field and laboratory ..... Hillslope soil movement and mixing creates patterns of organic carbon redistribution and.Read More
Decadal-scale soil redistribution along hillslopes in the Mojave Desert
Jun 4, 2015 ... are widely used as tracers of soil movement in a wide range of ... on the assumption that 137Cs is fixed to clay minerals on de- .... d. BRH north aspect e. BRH southwest aspect. Figure 3. The distribution of total 137Cs inventories (Bq m−2) per soil pit along the hillslope for each study site: (a) GM2, (b) EPR2,.Read More
Burbank, D. Rates of erosion and their implications for exhumation ...
During dynamic equilibrium, the geomorphic system displays a predictable configuration of interacting rivers, hillslopes and glaciated process zones. ... The rates of vertical movements of Fennoscandia substantially increased during the period of glacier thawing, achieved maximum values (8-12 cm/yr) by its complete...Read More
Runoff and Sediments from Hillslope Soils within a Native American ...
Mar 12, 2007 ... Mineral N and P contents in the same soils increase linearly from summits to ... study determined runoff and sediment production from hillslopes as functions of slope position, soil cover, and rainfall ... Slope position, cover type, and rainfall characteristics interact to influence movement and processing of...Read More
7.5 Influence of Chemical Weathering on Hillslope - School of ...
Chemical weathering affects hillslope form through dissolution and mineral transformations that lower the surface. In ..... D. Z. F re sh. , p oro us PDZ. Figure 2 Diagram showing the effect of chemical weathering on biologically mediated soil production. Influence of Chemical Weathering on Hillslope .... movement after failure.Read More
Geology Exam 3 Flashcards | Quizlet
Thus, gravity causes cooler air to sink, the resulting air movement, wind, can power sails and windmills. When water condenses, it rains and falls .... in some cases, groundwater passing through rock dissolves minerals and creates space, this refers to the amount of open space in a rock. permeability. refers to the degree to...Read More
Subsurface drainage from hummock-covered hillslopes in the Arctic ...
A ground-level photograph showing the surface of a hummock-covered hillslope, and a schematic section across several mineral earth .... sand (0.05–2.0 mm), silt (0.002–0.05 mm) and clay (0.002 mm) class sizes composing the soils sampled from various depths, d, below the surface of mineral earth hummocks d (m) sand...Read More
Mass Wasting - SIUE
These loose materials are easier to move by geomorphic processes or denudation agents (i.e., mass wasting, running water, wave action, glacier, wind and others) to produce landforms =>. Mass Wasting: A Major Hillslope Process. What is Mass Wasting? Mass wasting, also called Mass Movement, involves the downslope...Read More
Snowmelt runoff from northern alpine tundra hillslopes - University of ...
processes that must be represented in simulations of snowmelt runoff from sub-alpine tundra hillslopes; (c) describes how these processes can be represented in a numerical simulation model; and d) compares field measurements with modelled output to validate or refute the .... soil and included the mineral substrate.Read More
Hillslope soils and vegetation - Arizona State University
Jan 28, 2015 ... Ronald Amundson a,⁎, Arjun Heimsath b, Justine Owen a, Kyungsoo Yoo c, William E. Dietrich d ... Weathering. Assessing how vegetation controls hillslope soil processes is a challenging problem, as few abiotic landscapes exist as ..... cline with time caused by chemical weathering of the primary minerals.Read More
Redistribution of pyrogenic carbon from hillslopes to stream ...
vertically into the mineral soil and remained in the organic layer or had been transported off site by rainfall ... and may be deposited on hillslopes or within stream corridors [Bodí et al., 2014], forming intermediate .... To track movement of PyC concurrent with episodic rain events, sediments eroded from hillslopes were.Read More
Hillslope permeability architecture controls on subsurface transit ...
May 7, 2016 ... Hillslope permeability architecture controls on subsurface transit time distribution and flow paths. A.A. Ameli a,d,*. , N. Amvrosiadi b, T. Grabs b, H. Laudon c, I.F. Creed a, J.J. McDonnell d,e, K. Bishop b,f ... analytical physically-based integrated subsurface flow and advective–dispersive particle movement.Read More
study of soil properties along a hillslope in parson's ... - City of Boulder
these two samples were over-represented by mineral soil due to the depth of sampling, reflecting a general problem with composite sampling even at one point. The steepness of the slope section should affect the movement of water along the hillslope, resulting in patterns of erosion, vegetation establishment, soil moisture...Read More
controlled hillslope sedimentation in southeast Nevada - Utah State ...
from hillslopes. Attempts to understand what controls variability in the sedimentary record should therefore consider the primary vari- ability of hillslope sediment yield to ..... and heavy-mineral content were performed on ..... (D) Particle-size data for three different carbonate rock types on the hillslope immediately above the.Read More
Coupling between Biota and Earth Materials in the Critical Zone
BIOTA AND CHEMICAL WEATHERING. Chemical weathering is the aqueous alteration of minerals ... Ronald Amundson,1 Daniel D. Richter,2 Geoff S. Humphreys,3. Esteban G. Jobbágy,4 and Jérôme Gaillardet5. 1 ..... The realization that soil movement from hillslopes is con- trolled by both slope and biota is arguably...Read More
1 The Importance of Earth Surface Processes | Landscapes on the ...
In this view of a recently deglaciated valley in the Juneau Icefield, Alaska, surface features comprise hillslopes, rock falls and slides, glaciers (in the far distance ... Spatial variation in erosion across a mountain belt due to climatic differences can affect the pattern of upward and lateral movement of rock toward Earth's surface.Read More
Tracing hillslope sediment production and transport with in situ and ...
profiles A, B, C, and D confirm description of the hillslope as grossly planar with an average gradient of 14°. Transect cross sections ... The resulting loss on ignition (LOI) represents both organic carbon and the water of hydration of some weathering minerals. This burned material (13 to 47 mg) was dissolved at 95°C in open...Read More
Compendium of Forest Hydrology and Geomorphology in British ...
Jennifer McConnachie. Environmental Officer. Northgate Minerals Corp. ... Dave Spittlehouse. Research Climatologist. B.C. Ministry of Forests and Range. Victoria, B.C.. Kerstin Stahl. Research Associate. Institute of Hydrology. Freiburg, Germany. John D. Stednick. Professor ..... Water Storage and Movement on Hillslopes .Read More
Post-Fire Treatment Effectiveness for Hillslope Stabilization
Robichaud, Peter R.; Ashmun, Louise E.; and Sims, Bruce D., "Post-Fire Treatment Effectiveness for Hillslope Stabilization" (2010). JFSP Synthesis ... has been motivated by research that shows the proportion of exposed mineral soil (or conversely, the propor- tion of ground ..... movement by wind and decay rate). Treatment...Read More
The Role of Subsurface Flow in Hillslope and Stream Bank Erosion ...
landscapes, however, the dominant source of sediment is derived from mass wasting of hillslopes and stream banks, potentially driven by ..... describes the criti- cal depth of saturated soil, H cr. , that can trigger shallow landslides by groundwater flow: (. ) (. )( ) cr. 2 w. 2 sat uns w tan tan cos tan tan tan cos. H c. D γ α α φ α.Read More
Floods and landslides - RECARE project
A landslide is defined as the movement of a mass of rock, debris, artificial fill or earth down a slope, under the force of gravity, causing a deterioration or loss of one or more soil ... fall intensity, - analyze flood generation potential of soils at hill slopes and catchment scales, statistical analysis of precipitation measurements.Read More
Earth Science - New York Regents January 2004 Exam - Multiple ...
(2) movement of Foucault pendulums and the Coriolis effect on air movement .... Which mineral will scratch glass (hardness = 5.5), but not pyrite? ... d Hillslopes e Stream patterns f Atmospheric composition. Observations and measurements of which three characteristics would be most useful in describing landscapes?Read More
Geologic Interpretation of Floodplain Deposits of the Southwestern ...
The transect ran from hillslope to bottomland across T17SR4W and ... The mineral crystals are very euhedral, lack rounding or abrasion, are shiny and easily ...... the same indictor minerals are present in the upper units of the hillslope. (Appendix D). To investigate the possible extent of this mineralogic assembledge, two.Read More
Geologic versus wildfire controls on hillslope processes and debris ...
As in many areas of high relief, debris flows are an important process linkage between hillslopes and the Green River in the ..... d The hyposometric integral is the area beneath the curve in a plot of normalized catchment elevation versus normalized catchment area (Strahler,. 1952) ..... Slope movement types and processes.Read More
Tree-ring record of hillslope erosion and valley floor dynamics ...
Feb 23, 2006 ... Tree-ring record of hillslope erosion and valley floor dynamics: Landscape responses to climate variation during the last. 400yr in the Colorado Plateau, northeastern Arizona. Joseph R. McAuliffe a,⁎. , Louis A. Scuderi b. , Leslie D. McFadden b a Desert Botanical Garden, 1201 N. Galvin Pkwy., Phoenix,...Read More
Geoecology of the Marias River Canyon, Montana, USA: Landscape ...
Archaeological materials are also preserved high on the dissected canyon walls where movement of hillslope sediment and colluvium by sheetwash led to their burial (Sparrowhawk site). Deposition of sediment of contrasting physical attributes (grain size, sorting, clay mineral content) within the canyon influences soil...Read More
Geomorphology - Wikipedia
Other geomorphologists study how hillslopes form and change. Still others investigate the relationships between ecology and geomorphology. Because geomorphology is defined to comprise everything related to the surface of the Earth and its modification, it is a broad field with many facets. Geomorphologists use a wide...Read More
Unstable rock slope hydrogeology - Hal
Aug 25, 2011 ... émanant des établissements d'enseignement et de recherche français ou ... geology: insights from the large-scale study of western Argentera-Mercantour hillslopes (South-East. France). Bulletin de ... and deformation. For instance at “Zentoku” landslide, the movement induces underground erosion and the.Read More
Ecological mitigation of hillslope instability: ten key issues facing ...
Mar 11, 2014 ... Ecological mitigation of hillslope instability: ten key issues .... D. Polster. Polster Environmental Services,. 6015 Mary Street, Duncan, BC V9L 2G5, Canada. F. Preti. Engineering for Agro-Forestry and Biosystems Division,. Università Firenze ... downward and outward movement of slope-forming materials...Read More
Ecology of Freshwater and Estuarine Wetlands - Sample Chapter
hillslope hydrology and local hydrologic budgets affect soil properties and determine the for- .... water movement through organic soil materials is generally slow. ... mineral soil of sesquioxides c. Concretions or nodules p. Plowing or similar disturbance d. Physical root restriction (e.g., q. Accumulation of secondary silica.Read More