Stream bank erosion rates measured over a two-year period on a moorland and a forested stream were compared. Bank erosion rates are generally higher on the mainstream of the moorland catchment and highest in winter on both streams. Bank erosion
is correlated with the incidence of frost. Analysis of the vertical distribution of erosion on the banks of both streams suggests an undercutting mechanism which is more pronounced in the moorland stream. The influence of trees on bank erosion and possible
implications for the management of forest streams are discussed.
Vegetation and channel variation; a case study of four small streams in southeastern Australia
Australia ; Channel geometry ; Gravel ; New South Wales ; River bed ; Sand ; Stream ; Stream flow ; Vegetation
The purpose of this paper is to examine variations in vegetation along 4 small streams in the Illawara region of southeastern Australia, to develop appropriate vegetation categories or indices that reflect the influence of vegetation on channel
variations of these selected streams, and to compare these indices with those developed elsewhere in terms of broadly recognised hydraulic geometry relationships.
California ; Carrying capacity ; Channel geometry ; Grain size distribution ; Longitudinal section ; Mathematical model ; Model ; Sediment load ; Sediment transport ; Stream ; United States of America
A theoretical model is presented which shows that streams with low solids concentrations and low lateral inflows, whose bed load sediments undergo either comminution or hydraulic sorting under steady or quasi-steady conditions, have exponential
profiles. Similar streams in which both communition and sorting are significant have exponential profiles only if they are short. A comparison of the model and communition and sorting data from the literature strongly suggests that hydraulic sorting
and comminution dominate in short and long natural streams, respectively.
Nonlinear downstream changes in stream power on Wisconsin's Blue River
Carrying capacity ; Drainage network ; Fluvial dynamics ; Lithology ; River bed ; Sediment transport ; Slope gradient ; Spatial variation ; Stream ; United States of America ; Wisconsin
Spatial characteristics of stream power are examined along 4 stream reaches through the Blue River watershed in southwestern Wisconsin. This study contributes to the general problem of explaining the spatial structure of energy expenditure
in fluvial systems by analyzing downstream variations in stream power along individual, yet spatially interconnected, pathways through which water and sdiment move in the drainage network.
The stream table in physical geography instruction
Discussion of the advantages of a stream table to introduce students to fluvial processes in landscape development. Provides descriptions of six exercises and two demonstrations to understand various physical processes. - (DWG)
Dynamics of wood transport in streams : a flume experiment
Carrying capacity ; Experimentation ; Fluvial dynamics ; Japan ; Model ; River bed ; River transport ; Stream ; Stream flow ; Transport ; Wood
The AA. examine some dynamics of wood transport in streams through a series of flume experiments, at the Publish Works Research Institute (PWRI), Tsukuba, Japan, and observe 3 distinct woodtransport regimes : uncongested, congested and semi
Bank erosion ; Braided channel ; Erosion ; Fluvial processes ; Model ; Network ; Sediment transport ; Slope gradient ; Stream
. The most crucial parameter choice is the use of a non-linear exponent (>1) to describe the relation between sediment flux and local stream power. In addition, the AA. show that there is a simple and apparently fundamental connection between braided-stream
Characteristics of log and clast bed-steps in step-pool streams of northwestern Montana, USA
Carrying capacity ; Drainage ; Montana ; Mountain ; River bed ; Sediment load ; Stream ; Stream flow ; United States of America ; Wood
The role of log and clast steps was studied in 53 step-pool reaches in 32 streams in northwestern Montana. In each reach, 20 consecutive steps were sampled. No significant difference exists between clast and log steps with regard to step spacing
network occupying the region during the subsidence and post-inversion stages. The AA. show how the differences between the 2 stages as regards stream location, fluvial styles and flow directions and the overall evolution of the hydrographic network provide
Alluvial cone ; Base level ; Channel geometry ; Climatic variation ; Fluvial dynamics ; Fluvial erosion ; Land use ; Lithology ; Plant cover ; Semi-arid area ; Southern United States ; Stream ; United States of America
Many ephemeral streams in western North America flowed over smooth valley floors before transformation from shallow discontinuous channels into deep arroyos. These inherently unstable streams of semiarid regions are sensitive to short-term climatic
changes, and to human impacts, because hillslopes supply abundant sediment to infrequent large streamflow events. Discontinuous ephemeral streams appear to be constantly changing as they alternate between 2 primary modes; either aggradation or degradation
C 14 dating ; China ; Fluvial capture ; Fluvial terrace ; Heavy minerals ; Huang He ; Meander ; Palaeogeography ; Pleistocene ; Qinghai ; Stratigraphy ; Stream ; Stream flow
There are 7 steps of terrace both in the Guide basin and Gonghe basin along the Yellow River. 3 ancient terraces are found in the Gonghe basin. The upper reaches of the Yellow River was joined up by a series of stream captures at different periods
Agricultural land use ; Carrying capacity ; England ; Grain size distribution ; Oxfordshire ; Precipitation ; Rill wash ; Soil erosion ; Stream ; Stream flow ; Suspended load ; United Kingdom ; Watershed
characteristics of sediment in the form that it is eroded and transported in the field under natural conditions, both across slopes and within streams.
The objective of this paper is to present results of continuous bedload measurements in a mountain catchment, and to compare sediment transport data in relation to flood parameters for several mountain streams in Switzerland. The torrents considered
in this study have average bedslopes above 10 per cent. A detailed analysis of the measurements in the Erlenbach stream results in an empirical equation in which the sediment load per flood event is expressed as a function of the effective runoff volume
Aquaculture ; Economic impact ; Energy ; Power station ; Resource management ; River basin ; Stream ; United States of America
to augment stream volume and velocity in the spring. Power generation has taken priority because the economic benefits derived from it are easily weighed and the water budget measure may not increase the survival rates of migrating salmonids. - (SLD)
Braided channel ; Channel geometry ; Discharge ; Fluvial processes ; Meander ; Model ; River bed ; Stream flow ; Topography ; United States of America ; Wyoming
of the magnitude of the component terms in the downstream and cross-stream force balance at the different stages.