Quantifying the mechanical and hydrologic effects of riparian vegetation on streambank stability
Bank erosion ; Erosion control ; Geotechnics ; Mississippi ; Modelling ; Riparian vegetation ; Soil properties ; Stream ; United States of America
, clump grasses, and bare/cropped turf grass) on streambank stability. The results demonstrate the importance of hydrologic processes in controlling streambank stability, and highlight the need to select riparian vegetation based on hydrologic as well
This paper reports a field monitoring and computer-modelling investigation that has been carried out in northern Mississippi to quantify the separate and combined hydrologic and mechanical effects of 3 different vegetation covers (mature trees
and statistical analysis of curvature series based on autocorrelation and spectral analysis. This paper argues that the scaling of wavelengths with discharge can be considered a strong factor controlling planform evolution on some small meandering river systems
Subsurface hydrologic flowpaths and NO3 transport in Kawakami forested headwater catchment, central Japan
The objectives of the study are to elucidate the control of subsurface flow and biogeochemical characteristics on NO3 mobility and to conceptualize the linkage of hydrologic flowpaths and N pathways in a forested headwater catchment.
Three-dimensional mapping of geomorphic controls on flood-plain hydrology and connectivity from aerial photos
Aerial photography ; Biodiversity ; Floodplain ; Geomorphology ; Hydrology ; Model ; Montana ; Photointerpretation ; Stream ; United States of America ; Vegetation dynamics
The AA. outline a method to identify and describe likely geomorphic controls on vertical and lateral hydrologic connectivity. They examine elevation differences among surveyed flood-plain elements (i.e., vegetation patches and channel reaches
Effects of urbanization on the hydrology of a suburban basin in Porto Alegre, Brazil in The influence of Man on the hydrological regime with special reference to representative and experimental basins.
Le développement urbain pose des problèmes de drainage et de contrôle de l'écoulement des débits maximaux de crues, dues aux averses. L'article présente un modèle de simulation simple pour la ville de Porto Alegre au Brésil, dont les paramètres
Geochemical and physical controls on vadose zone hydrology of Holocene carbonate sands, Grand Bahama Island
This paper explores the relationship between vadose zone hydrology and geochemical changes in mixed mineralogy carbonate sands from a Bahamian coastal dune of Holocene age. Such links have remained largely unexplored, but the integration
of geochemical and hydrological properties has the potential to provide important new insights into both diagenetic evolution and chronosequence development. Cores were taken from 2 sites: a shallow humic entisol and a more organic-rich inceptisol.
Hillslope topographic and hydrologic effects on overland flow and erosion
Soil pattern as a key controlling factor of water erosion. Special issue
positions and recreating specific surface hydrologic conditions in a controlled laboratory setting. The results show a close linkage between surface moisture condition and erosion process, and consequently, the dominant sediment regime. These approaches
This paper addresses spatial and temporal variability in runoff and erosion processes caused by topographic and hydrological variations. Research efforts included monitoring natural runoff and sediment production in the field at different hillslope
Regolith stripping and the control of shallow translational hillslope failure : application of a two-dimensional coupled soil hydrology-slope stability model, Hawke's Bay, New Zealand
Geotechnics ; Hydrology ; Landslide ; Model ; New Zealand ; North Island ; Precipitation ; Regolith ; Slope ; Slope dynamics ; Soil moisture ; Threshold
This paper explores the hypothesised influence of progressive regolith stripping and redeposition on slope failure using a recently developed process-based model. This model couples dynamic hydrology with slope stability analysis, allowing to relax
. This study has shown that expected relationships exist only at relatively symmetrical junctions (Q2/Q1 > 0.7), where the simultaneous hydrological responses of the tributaries predominantly control channel morphology and sediment properties.
The classifications presented in this paper confirm that changes in stream channel morphology and sedimentology at confluences are complex. These changes do not conform strongly to expected relationships based on hydrologic considerations alone
The determination of suction-controlled slope stability in humid temperate environments
Hydrology ; Model ; Permeability ; Scotland ; Slope ; Slope dynamics ; Soil properties ; Temperate zone ; United Kingdom
In this paper two models are employed to assess whether hillslopes in humid temperate environments may be suction controlled. In 1988 a series of storms produced several shallow planar slope failures, in freely-draining, permeable soils on slopes
in the Glen Livet Estate, Scotland. The two models, when applied to these slope failures, indicate the possibility that slopes may fail under unsatured conditions, and that their stability is thus controlled by the minimum suction which may develop
Catastrophe ; Channel geometry ; Flood ; Floodplain ; Fluvial hydrology ; Illinois ; United States ; Wisconsin
This paper analyzes the variation in flood power both at-a-station and downstream in a basin of differing lithologies, and discusses the geologic and geomorphic controls on flood power. Floodplain width influences these local and general controls
, and will directly and indirectly control flood power within the drainage network through its control on the rates of change of several hydraulic variables during discharge increases.
Aspects géomorphologiques de la régulation dun cours d'eau et des mesures de contrôle des crues en Hongrie
Flood control ; Fluvial hydrology ; Geomorphology ; Hungary ; River regime
. After a brief overwiev of the history of flood control in the Tisza basin the most important tasks of research and the possible adequate methods of flood control are discussed. - (JS)
les AA. testent l'hypothèse du contrôle de l'hydrologie des versants par les différentes strates superficielles périglaciaires trouvées sur les versants de nombreuses régions, ces strates ayant des propriétés hydrauliques différentes.
Subsurface hydrology of layered colluvium mantles in unchanneled valleys, South-Eastern Brazil
The effects of subsurface hydrology on the evolution of erosive processes inside layered colluvium mantles in unchannelled valleys are investigated. Tensiometer nests were installed in different morphological conditions with their specific depths
controlled by the subsurface structure of the colluvium mantle. Daily readings (during one year) and physical and mechanical analyses of the different colluvium layers were carried out.
there are also three (floodplain, flood channel, low-water channel). Combinations of these three categories define the diversity of patterns. The critical stream power values and hydrological regime together define the channel pattern, and analysis of the pattern
Regional controls on geomorphology, hydrology, and ecosystem integrity in the Orinoco delta, Venezuela
This paper describes major regional processes that control the movement of water and sediment into and through the Orinoco delta and along the coast. To do so, the AA. integrate information generated by an extensive literature review, satellite
Effect of vegetation cover on the hydrology of reclaimed mining soils under Mediterranean-Continental climate
times throughout the year (late winter, summer and autumn) to control the influence of seasonal climatic fluctuations. Experiments were carried out at different times throughout the year to assess the seasonal influences on soil hydrology. As a practical
objective, the AA. aimed to identify an optimal threshold of vegetation cover to achieve satisfactory biological control of soil hydrology in the studied environment.
The aim of this investigation was to study the influence of the herbaceous vegetation cover on the hydrological response of reclaimed mining soils by means of simulated rainfall, in a Mediterranean-Continental environment (central-eastern Spain
). The effect of herbaceous vegetation cover on soil hydrology was analysed by means of rainfall simulation in reclaimed soils derived from opencast coal mining (a non-saline and clay-loam textured spoil). The simulation experiments were conducted at 3 different