study of surface runoff due to moving rainstorms by Ben Chie Yen Download PDF EPUB FB2
In this study the importance of the movement of rainstorms on the time distribution of the surface runoff from watersheds is demonstrated through the use of a laboratory watershed experimentation system.
Experiments were performed on the impervious square watershed for 2 rainfall intensities, 4 surface slopes, and 14 rainstorm by: Numerical modeling of surface runoff and erosion due to moving rainstorms at the drainage basin scale. Rainstorms moving upstream and downstream with a constant speed were simulated over a laboratory soil flume.
The storm movement was obtained by moving, on wheels, the support structure of the nozzles over the flume. Cited by: Request PDF | Numerical modeling of surface runoff and erosion due to moving rainstorms at the drainage basin scale | A physically-based distributed erosion model (MEFIDIS) was applied to evaluate.
A Study of Surface Runoff Due to Moving Rainstorms (HES 17) By Ben Chie Study of surface runoff due to moving rainstorms book and Ven Te Chow. Get PDF (15 MB) Abstract. National Science Foundation, Research Grant GKunpublishednot peer reviewe Topics: Surface Runoff Author: Ben Chie Yen and Ven Te Chow.
Lee & Huang  studied the effect of moving rainstorms on attainment of equilibrium discharge in a V-shaped catchment and concluded that for storms moving downstream, runoff can attain equilibrium discharge and this subject is incompatible with conventional hydrologic design that assumes the storm duration must equal the time to equilibrium.
Numerical modeling of surface runoff and erosion due to moving rainstorms at the drainage basin scale J.P. Nunes a,*, J.L.M.P. de Lima b, V.P. Singh c, M.I.P. de Lima d, G.N.
Vieira a a Environmental Systems Analysis Group (GASA), Faculty of Sciences and Technology, New University of Lisbon, Quinta da Torre, Caparica, Portugal. Based on the kinematic wave equations, the influence of moving rainstorms on the surface runoff were analyzed with a focus on the rainfall distribution types.
Runoff appears in uncontrolled surface streams, rivers, drains and sewers. Factors that affect runoff include the amount of rainfall, permeability, vegetation and the slope of the land.
Surface runoff (also known as overland flow) is the flow of water that occurs when excess stormwater, meltwater, or other sources flow over the Earth's can occur when the soil is saturated to full capacity, and rain arrives more quickly than soil can absorb it.
Surface runoff often occurs because impervious areas (such as roofs and pavement) do not allow water to soak into the ground. Surface runoff can also be diverted by humans for their own uses.
The small creek shown in the picture above will merge with another creek, eventually flowing into a larger river. Thus, this creek is a tributary to a river somewhere downstream, and the. EVALUATION OF RUNOFF RESPONSE TO MOVING RAINSTORMS JIN LIANG Marquette University, The primary hypothesis from the hydrological literature is that downstream moving storms with storm length () less than watershed length () magnify the peak discharges.
This. The open-book watershed modeling concept was first formulated by Yen and Chow [ A laboratory study of surface runoff due to moving rainstorms.
Water Resources Research 5(5), –] more than 30 years ago as a convenient and pragmatic framework to understand the underlying physics behind surface hydrologic phenomena. Learn surface runoff with free interactive flashcards. Choose from 22 different sets of surface runoff flashcards on Quizlet.
Runoff occurs when there is more water than land can excess liquid flows across the surface of the land and into nearby creeks, streams, or ponds.
Runoff can come from both natural processes and human activity. The most familiar type of natural runoff is ins that cannot absorb water from heavy snowfalls produce runoff that turns into streams, rivers, and lakes.
Water Erosion & Runoff. STUDY. (18) Moving Water. the major agent of the erosion that has shaped Earth's surface.
Runoff. water that flows over the earths surface rather than soaking into the ground. 5 Things that effect the amount of runoff. Amount of rain, Amount of vegetation, type of soil, Shape of the land- steeper= more runoff How the.
Surface runoff is water, from rain, snowmelt, or other sources, that flows over the land surface, and is a major component of the water cycle. Runoff that occurs on surfaces before reaching a.
It is well recognized that surface runoff from a watershed due to a rainstorm varies with the hydro-meteorological characteristics of the rainfall and the physiographic properties of the watershed. The direct influence of rainfall movement on the shape of a runoff hydrograph has been known for a long time.
The primary hypothesis from the hydrological literature is that downstream moving storms with storm length (Ls) less than watershed length (Lc) magnify the peak discharges.
This hypothesis was developed from the kinematic-wave modeling, and was evaluated in a plot between the dimensionless peak discharge and dimensionless storm velocity. Previously unpublished experimental data collected from.
Urban (city) runoff can come from many manmade sources, such as runoff from impervious surfaces, irrigation, washing vehicles, roofs, etc. Natural, direct rainfall can also be the cause of surface runoff. Heavy rainstorms often do not percolate through the ground fast enough, causing water to flow towards the lower ground and collect.
The goal of this investigation is to compare the hydrologic simulations caused by the areal-averaging of dynamic moving rainfall. Two types of synthetic rainfall are developed: spatially varied rainfall (SVR) is the typical input to a distributed model while temporally varied rainfall (TVR) emulates SVR but is spread uniformly over the entire watershed as in the case of a lumped model.
Runoff may be classified according to speed of appearance after rainfall or melting snow as direct runoff or base runoff, and according to source as surface runoff, storm interflow, or groundwater runoff.
The sum of total discharges described in (1), above, during a specified period of time. Since rainfall activates watershed responses in hydrologic systems, it is critical information for predicting flow and pollutant transportation, and then impacting watershed management strategies.
Therefore, it is important to understand clearly rainfall characteristics in the application of hydrologic and water quality models. The objective of this study was to discuss the influence of storm. Surface detention/ Detention storage: The amount of water on the land surface in transit towards stream channels is called detention storage/surface detention.
Types of Runoff: Surface runoff/ Sub-surface runoff or Base flow. 5 a. Surface Runoff: That portion of rainfall which enters the stream immediately after the rainfall.
National Research Project for Simulated Rainfall - Surface Runoff Studies Research Project is to relate soil test P and surface runoff P, with other confounding factors such as fertilizer or manure application minimized.
However, while the plots are in place and after reduce the amount of rainfall collected due to nozzle configuration. Surface runoff is a major component of the water cycle.
It is the primary agent in soil erosion by water. Runoff that occurs on the ground surface before reaching a channel is also called a. Surface water runoff 1. 1 SURFACE WATER RUNOFF by Prof. Balasubramanian Centre for Advanced Studies in Earth Science University of Mysore, India 2. 2 Introduction: Stream flow representing the runoff phase of the hydrologic cycle is the most important basic data for.
Surface runoff can be generated either by rainfall, snowfall or by the melting of snow, or glaciers. Snow and glacier melt occur only in areas cold enough for these to form permanently. Typically snowmelt will peak in the spring and glacier melt in the summer, leading to.
Runoff, in hydrology, quantity of water discharged in surface includes not only the waters that travel over the land surface and through channels to reach a stream but also interflow, the water that infiltrates the soil surface and travels by means of gravity toward a stream channel (always above the main groundwater level) and eventually empties into the channel.
Surface Runoff Science The Basic Conceptions of Hydrology and Runoff Study The Basic Research Aspects in the Field of Study of Runoff The Future of Study of Runoff Glossary Bibliography Biographical Sketch Summary Surface runoff, in a wide sense, is a natural phenomenon of free water movement within.
study of rainfall – runoff processes, or more generally surface water input – runoff processes. The term, "surface water input" is used in preference to rainfall or precipitation to be inclusive of snowmelt as a driver for runoff.
Answering the question of how much runoff is generated from surface water inputs requires partitioning water. The Runoff Processes module offers a thorough introduction to the runoff processes critical for flood and water supply prediction.
This module explains key terminology and concepts including the following: types of runoff, paths through which water becomes runoff, basin and soil properties that influence runoff, and numerical runoff modeling.tensity pattern but with the same average rainfall intensity and total rainfall amount, were designed to quantify how rainstorm patterns affect runoff and sediment yield processes.
The five rainstorm patterns were subjected to two slope gradients (5° and 10°) and two surface treatments that entailed the presence or absence of raindrop impact, in which the absence was simulated by placing.We developed a GPU-accelerated 2D physically based distributed rainfall runoff model for a PC environment.
The governing equations were derived from the diffusive wave model for surface flow and the Horton infiltration model for rainfall loss. A numerical method for the diffusive wave equations was implemented based on a Godunov-type finite volume scheme.