Topography mainly affects slope stability through two main processes. The relation between geometry, hydrology and stability of complex. The relation between geometry, hydrology and stability of. Transient hydrology, described by the richards 1931 equation, determines soil moisture changes and related variations in pore water pressure. Geomorphological control on variably saturated hillslope. Hillslope hydrology and stability by lu, ning and a great selection of related books, art and collectibles available now at. A combined hillslope hydrologystability model for low. Download hillslope hydrology and stability pdf book author, online pdf book editor hillslope hydrology and stability. A physical model considered the effect of overland water flow. This implies the lower potential for landsliding in the sandstone hillslopes, corresponding to the lower landslide activity. Hillslope hydrology and stability assets cambridge university. Recent research in hillslope hydrology involving tracers, especially in humid catchments has found that the dominant contributor to stormflow in the stream is preevent water averaging 75% world wide, buttle, 1994. This study assessed the effects of forest harvest on hillslope hydrology and linked hydrologic change before and after harvest with a simple model of hillslope stability. In this paper, a physical model considered the effect of overland water flow on rainfallinduced shallow landslides is derived and applied to predict the landslides.
Here we apply the model to investigate the effect of neglecting the unsaturated storage on the assessment of slope stability in the steadystate hydrology. May 19, 2016 we aim to assess and quantify the impact of topography on both saturated and unsaturated hillslope hydrology and its effects on shallow slope stability. Limitations exist with all existing seepage erosion sediment transport functions, including neglecting the. Hillslope hydrology and stability request pdf researchgate.
Observations of peak water table heights in 56 groundwater monitoring wells showed that soil saturation levels on hillslopes differed significantly with harvest intensity at. Describing the fates of precipitation, the mechanics of runoff, and the calculations involved in assessment, this book clarifies the complex interplay of soils, sediment, subsurface flow, overland flow, saturation, erosion, and more. The department of forest engineering fe 537 hillslope hydrology. The relation between geometry, hydrology and stability of complex hillslopes examined using lowdimensional hydrological models, doctoral thesis, wageningen university, wageningen, the netherlands. This model is based on kinematic wave dynamics of saturated subsurface storage and the in. We aim to assess and quantify the impact of topography on both saturated and unsaturated hillslope hydrology and its effects on shallow slope stability. Sampling schemes for hillslope hydrologic processes and stability analysis based on crosscorrelation analysis jing sen cai, e. Slope stability analysis, landslide, hillslope hydrology and stability, pdf ebook, pdf, geoscience, remote sensing and gis open pdf and software resources of earthsciences, remote sensing and geographic information system. Download book hillslope hydrology and stability in pdf format.
Effect of root strength soil saturation on hillslope. This hierarchy can be envisaged as a cascade in which the. This is incorporated into a combined numerical hillslope hydrology stability model. For long term analysis, the linearized steadystate solution of the hsb equation berne. Kolka the hydrology, soils, and watershed processes of a. Physically based hydrogeological and slope stability modeling. This balance is governed by two coupled physical processes. Johan van tol, pieter le roux and malcolm hensley december 22nd 2011. Chuan yan, tianchyi j yeh, yuan yuan zha hydrology and water resources. Hillslope geometry, hillslope hydrology, hillslope stability, complex hillslopes, modeling shallow landslides, hsb model, hsbsm model.
The motivation for the research is to develop a physically. Based on the principles of hillslope hydrology, hydrologic information can be generated at suf. Advances in understanding of hydrological processes have been abundant in the last. Triggering mechanisms and rainfall thresholds of shallow. The hydrologic response of a hillslope to rainfall involves a complex, transient saturatedunsaturated interaction that usually leads to a water table rise. Regolith stripping and the control of shallow translational hillslope failure. Hillslope hydrology and stability ning lu, jonathan w. Pdf stability and damping in a dynamical model of hillslope.
Measurements from an instrumented network in a small area have been used to establish index. Hillslope hydrology and stability article in environmental and engineering geoscience 204. Stability calculations were made for each of the 34 piezometer sites in cedardecline areas using observed values of soil depth, saturated. In addition to testing our method for nine characteristic hillslope types, a general relationship between plan shape and profile curvature of landform elements and the factor of safety is derived for a pre. Download and murmur books online, epub pdf online audible kindle is an easy way to report, books for discordant.
Soil indicators of hillslope hydrology, principles, application and assessment in soil science, e. This study explores the potential of integrating stateoftheart physically based hydrogeological modeling into slope stability simulations to identify the hydrogeological triggers of landslides. It is well know that many shallow landslides are triggered by rainfalls. Recent studies have shown that the hillslope connection depends on. Stability analysis of a layered hillslope subjected to a constant infiltration rate of 0. The hydrologic response of a hillslope to rainfall involves a complex, transient. A complete guide to the behavior of water on graded land hillslope hydrology provides a comprehensive introduction to the behavior of water on a slope. Read hillslope and watershed hydrology online, read in mobile or kindle. Groundwater modeling reveals locations with elevated pore water pressures in the. Transient hydrology, described by the richards 1931 equation, determines soil moisture changes and related variations in pore water.
All books are in clear copy here, and all files are secure so dont worry about it. Hydrogeological models considering detailed morphological, lithological, and climatic factors were elaborated. The hillslope hydrology and stability analysis carried out in this paper are based on the geotopfs 2. Our results show that slope stability increases when profile curvature changes from concave to convex. Exercises and homework problems are provided for students to engage with the theory in practice. Summary of hillslope flow process wetland water budgets hydropatterns wetland hydraulics and residence time geomorphic controls on wetland hydrology effects of land use on wetland hydrology two wetland soils, hydrology, and geomorphology c. Swgw interaction needs to be understood from the watershed perspective. Implications of the extreme spatial variability in porewater pressure are evaluated for conceptual models of hillslope hydrology. Jul 16, 2018 this study explores the potential of integrating stateoftheart physically based hydrogeological modeling into slope stability simulations to identify the hydrogeological triggers of landslides. You can read online hillslope hydrology and stability here in pdf, epub, mobi or docx formats. Hillslope hydrology and stability download ebook pdfepub. In previous studies of shallow landslide models, the effect of overland water flow on slope stability was ignored.
British columbia is a diverse province with mountain ranges and incised plateaus. Preevent water is water that was present in the hillslope before the storm as identified by a distinct isotopic or. The mountainous topography is responsible for creating a variety of climates. The hydrologic response of a hillslope to rainfall involves a complex, transient saturatedunsaturated interaction that. Similarly, the risk management aspects, such as hazard mapping and risk assessment. Because the latter model is discussed in detail by angeli et al. Lecture overview background on hillslope hydrology boussinesq equation for unconfined flow over a sloping bed water balance method for hillslope segments the importance of divergence and convergence of hillslopes. Advances in hillslope hydrology have been numerous in the past four decades. Despite a largely soilcentric view of hillslope hydrology, early workby wilson and dietrich1987 ina zeroorder basin incalifornia showed the potentially signi. Download hillslope and watershed hydrology ebook free in pdf and epub format.
Mar 14, 2015 it is well know that many shallow landslides are triggered by rainfalls. Hillslope hydrology edited from 2002 lecture notes by j. A linear reservoir model for simulation of ground water levels was coupled to a viscoplastic stability model. Quantifying the threedimensional effects of anisotropic soil. Bank stability summary seepage erosion is an important factor in hillslope instability and failure. Hillslope processes occur on a complex template, composed of a wide array of topographies, climates, geologies, and ecosystems chapter 2, physiography of british columbia. Please click button to get hillslope hydrology and stability book now.
Mar 19, 2020 hillslope hydrology and stability landslides occur when hillslopes become mechanically unstable, because of meteorological and geologic processes, and pose a serious threat to human environments in their proximity. Hillslope hydrology and stability oregon state university. Flow duration curve analysis, hydrologic alteration, ranges of variability. A stability analysis is performed on the twostate variable, integralbalance model of hillslope hydrology developed by duffy 1996.
Pdf hillslope and watershed hydrology download ebook for. Hillslope hydrology provides a comprehensive introduction to the behavior of water on a slope. Three real hillslope morphologies concave, convex, and planar are analyzed using a 3. Jeff mcdonnell richardson chair in watershed science 015 peavy hall 7378720. Hillslope hydrology and stability ning lu colorado school of mines jonathan godt united states geological survey, colorado about the book landslides are caused by a failure of the mechanical balance within hillslopes. Request pdf hillslope hydrology and stability landslides are caused by a failure of the mechanical balance within hillslopes. Process studies in hillslope hydrology pdf despite rapid hillslope transport processes during events, soil.
Hillslope hydrology and stability landslides occur when hillslopes become mechanically unstable, because of meteorological and geologic processes, and pose a serious threat to human environments in their proximity. This book is, essentially, a textbook for a graduatelevel course in slope stability analysis. The assumption of parallel seepage flow is widely adopted in translational slope stability analyses, imposing a linear distribution of porewater pressure with depth. Download pdf hillslope hydrology and stability free.
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