2 edition of hydraulics of overland flow on hillslopes. found in the catalog.
hydraulics of overland flow on hillslopes.
William W. Emmett
|Series||Geological survey professional paper -- 662-A|
|Contributions||United States. Geological survey.|
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): ABSTRACT: The prediction and estimate of soil erosion is fundamental important for understanding the effect of the spatial heterogeneity of underlying surfaces and preventing ecological environment deterioration. This paper summarized soil erosion into three basic dynamics processes, including the process of runoff. Estimation of hydraulic resistance to overland flow on vegetated hillslopes is crucial for appropriate modeling of flow routing determining sediment transport capacity, and quantifying soil erosion. In areas covered with patches of shrubs or woody plants, the hydraulic resistance may vary markedly over short distances and is largely determined.
Anchor: #i Section Time of Concentration. Time of concentration (t c) is the time required for an entire watershed to contribute to runoff at the point of interest for hydraulic design; this time is calculated as the time for runoff to flow from the most hydraulically remote point of the drainage area to the point under investigation. Hydraulic engineering expertise can be applied to a broad range of aspects of a TxDOT project including environmental documentation and mitigation, cross-drainage design, pavement drainage and storm drain design, detention facilities, storm water quality best management practices, and regulatory compliance.
Resistance to flow determines routing velocities and must be adequately represented both within stream channels and over hillslopes when making predictions of streamflow and soil erosion. The limit. Hydraulic systems are used in modern production plants and manufacturing installations. By hydraulics, we mean the generation of forces and motion using hydraulic fluids. The hydraulic fluids represent the medium for power transmission. The object of this book is to teach you more about hydraulics and its areas of application.
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The hydraulics of overland flow on hillslopes by william w. emmett dynamic and descriptive studies of hillslopes geological survey professional paper a united states government printing office, washington: united states department of the interior walter j.
hickel, secretary Cited by: Get this from a library. The hydraulics of overland flow on hillslopes: dynamic and descriptive studies of hillslopes. [William W Emmett; Geological Survey (U.S.),].
The hydraulics of overland flow on hillslopes Professional Paper A By: William W. Emmett. Hydraulics And Erosion Mechanics. Overland Flow.
DOI link for Overland Flow. Overland Flow book. Hydraulics And Erosion Mechanics. Edited By Anthony J Parsons. Edition 1st Edition. First Published Field And Laboratory Studies Of Resistance To Interrill Overland Flow On Semi-Arid Hillslopes, Southern Arizona. View abstract.
chapter Cited by: Try the new Google Books. Check out the new look and enjoy easier access to your favorite features. Try it now. 1 Field And Laboratory Studies Of Resistance To Interrill Overland Flow On SemiArid Hillslopes Southern Arizona. 1: Overland Flow: Hydraulics And Erosion Mechanics.
Overland Flow: Hydraulics And Erosion Mechanics Anthony J Parsons Encompassing geomorphology, hydrology and agricultural engineering, this provides an interdisciplinary review of a topic important in both Scientific And Practical Terms - With The Specific Aim Of Promoting interaction between modellers, field workers and laboratory experimentalists.
Athol D. Abrahams, Anthony J. Parsons, John Wainwright, Resistance to overland flow on semiarid grassland and shrubland hillslopes, Walnut Gulch, southern Arizona, Journal of Hydrology, /(94), (), (). The results showed that Froude number and flow velocity of the overland flow decreased, whereas flow resistance increased exponentially with litter incorporation rate.
Litter type had an influence on flow hydraulics, which can mainly be attributed to the variations in surface coverage of the exposed litter and the litter morphology. Journal of Hydrology, () Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands I1] HYDRAULICS OF INTERRILL OVERLAND FLOW ON A SEMI-ARID HILLSLOPE, SOUTHERN ARIZONA ANTHONY J.
PARSONSl, ATHOL D. ABRAHAMS2 and SHIU-HUNG LUK3 ' Department of Geography, University of Keele, Keele, Staffordshire, ST5. The test application refers to a typical rainfall runoff situation, i.e., rather shallow overland flow on a hillslope as a consequence of excess rainfall.
Contrary to the analytical model, the comparative analysis clearly shows the difficulties of the numerical solutions in terms of exactness and robustness when approaching typical shallow. L.P. Kasmaei et al., Modelling overland flow on burned hillslopes using the KINEROS2 model 1.
INTRODUCTION The enhancement of overland flow from storm events following wildfire has been widely reported e.g. to 3-fold increase in burned eucalyptus forest, Southeast Australia (Sheridan et al., ), 4-fold more overland.
Overland flow generation was monitored in large plots (8 × 25 m) on four hillslopes in a ha catchment in Mie Prefecture, Japan. Three Japanese cypress (hinoki, Chamaecyparis obtusa) treatments (including three different understory conditions) and one deciduous forest treatment were all plots, including deciduous hillslopes, we observed overland flow even for small storm.
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. 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 accuracy of process-based soil-erosion models is restricted not only in terms of the type of equation used, but also in their dependence on the input from models of the hydraulics of overland flow.
Ten commonly used equations are applied to model sediment transport to determine their sensitivities to errors in overland flow hydraulics. Overland Flow Times of Concentration for Hillslopes of Complex Topography employing hydraulic equations of flow, the shape of the hillslope geometry has often been assumed as rectangular and planar.
and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 12 months or until all downloads. Experimental investigation of Horton overland flow on tropical hillslopes; 2) hydraulic characteristics and hillslope hydrographs (Kenya). Article (PDF Available) January with 77 Reads.
The purpose of this study is to investigate the effects of rainfall erosivity index AI on the hydraulics of overland flow parameters such as the flow velocity, the flow depth, the flow regime, overland flow power and on soil surface characteristics, such as surface roughness and sediment concentration.
Riparian vegetation plays a vital role in inhibiting soil and water loss, but few studies have quantified the relationships between vegetation spatial pattern and the hydraulic characteristics of upslope runoff. This study investigated how hydraulic characteristics (e.g., runoff coefficient, flow regime, flow resistance, and flow shear stress of overland flow) responded to differences in.
Abrahams, A.D. and A.J. Parsons,‘Determining the mean depth of overland flow in field studies of flow hydraulics’, Water Res. Resea pp. – CrossRef Google Scholar. 1. Introduction  Hydraulic resistance to open‐channel and overland flows is an important characteristic that needs to be represented properly in modeling runoff, flood routing and inundation, and soil erosion.
Resistance estimation affects not only the accurate calculation of flow variables, such as the water depth, velocity, and shear stress, but also the prediction of their derivative.
The generation of surface runoff and the hydraulics of overland flow are, like many hydrologic and geomorphic phenomena, characterized by high levels of spatial and temporal variability.
Marked variation in hillslope runoff over short distances has been observed by many workers, including Emmett (), Roels (), Abrahams et al. () and.The plots on the hillslopes were short and relatively smooth, thus, we assumed that overland flow exhibits high connectivity to the experimental slope.
To study the effect of runoff depth on the amount of splash erosion, each treatment included 10 groups of rainfall duration (i.e., 3, 6, 9, 12, 15, 18, 21, 24, 27 and 30 min) and was replicated.A series of rainfall plot simulations was conducted on grass, shrub, oak savanna, and juniper sites in Arizona and Nevada.
A total of flow velocity measurements was obtained on % to % slopes with values ranging from m/s to m/s. The experimental data showed that flow velocity on inter-rill areas of rangelands was related to discharge and ground litter cover and was.