Use of analog models in the analysis of flood runoff

  • 24 Pages
  • 0.27 MB
  • English

Dept. of the Interior , Washington
Flood foreca
The Physical Object
Pagination24 p.
ID Numbers
Open LibraryOL22021746M

Additional Physical Format: Online version: Shen, John. Use of analog models in the analysis of flood runoff. Washington, U.S. Govt. Print. Off., "An analog-model study of rainfall excess versus flood runoff with special emphasis on the determination of flood frequency." Reproduction Notes: Electronic reproduction.

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Use of analog models in the analysis of flood runoff Professional Paper A By: John Shen. The analog technique is applied to the analysis of flood runoff. A quasi-linear analog model has been developed for simulating the runoff-producing characteristics of a drainage system.

Where storage is linear a unique relationship correlating the in­ flow and outflow peaks is derived. A technique for synthesizing flood-frequency distribution Cited by: 8. USE OF HYDROLOGIC MODELS IN THE ANALYSIS OF FLOOD RUNOFF John Shen Abstract The analog technique is applied to the analysis of flood runoff.

A quasi-linear analog model has been developed for simulating the runoff-producing characteristics of a drainage system. Where storage is linear a unique relationship correlatingCited by: 3.

The runoff analysis of the observed flood events showed that the storage function method was the most accurate of the three, and was followed by the linear reservoir cascade model and the discrete. The study applies advanced models of design storm like Flood Analysis and Protection Systems (FLAPS) and HEC-1 for rainfall-runoff simulation employing selected short-term events of three basins of the north-eastern region – Myntdu-Leska (Meghalaya), Krishnai and Dudhnai (Assam).

The results are used to study the sensitivity of the model parameters with respect to different hydrological. The linear reservoir is a widely used conceptual model of the rainfall–runoff process.

The linear reservoir model transforms rainfall excess to direct surface runoff. The shape of a physical analog of the linear reservoir has been developed mathematically and a laboratory-scale physical model constructed and tested experimentally under steady.

Now in its third edition, "Hydrology and Floodplain Analysis" continues to offer a clear and up-to-date presentation of the fundamental concepts and design methods required to understand hydrology and floodplain analysis. It addresses the computational emphasis of modern hydrology and provides a balanced approach to important applications in watershed analysis, floodplain computation, flood 4/5(1).

Shen J () Use of analogue models in the analysis of flood runoff. U.S. Geological Survey Professional Paper A 24 Shen C, Phanikumar MS () A process-based, distributed hydrologic model based on a large-scale method for surface–subsurface coupling.

The analog technique is applied to the analysis of flood runoff. A quasi-linear analog model has been developed for simulating the runoff-producing characteristics of a drainage system. Where storage is linear a unique relationship correlating the inflow and outflow peaks is derived.

The technique for synthesizing flood-frequency distribution is also discussed. If you will use complex model, then it will take more time for analysis and your lead time will be you have to select such type of model which would take less time for the analysis. Methods of flood frequency analysis usually consists of two steps.

The first step is the analysis of annual peaks at gaging runoff volume, or annual mean flows, through statistical correlation. models do not generally predict the total hydrograph and are of limited use whenever storage in the system is being considered.

Details Use of analog models in the analysis of flood runoff FB2

Satellite remote sensing has been used effectively to estimate flood inundation extents in large river basins. In the case of flash floods in mountainous catchments, however, it is difficult to use remote sensing information.

To compensate for this situation, detailed rainfall–runoff and flood inundation models have been utilized. Regardless of the recent technological advances in. Flood Frequency Analysis Return Period is a statistical measurement typically based on historic data and is usually used for risk analysis (e.g.

to decide whether a project should be allowed to go forward in a zone of a certain risk, or to design structures to. A second factor is related to the causative processes leading to the flood peaks.

Some flood peaks are caused by failure of landslide dams or other types of channel obstructions with subsequent dam-break flow (O’Connor et al. ; Ruiz-Villanueva et al. ).Flood peaks caused by the failure of landslides and large wood jams are not directly related to runoff-generation processes and.

Hydrological models for regions characterized by complex runoff generation process been suffer from a great weakness. A delicate hydrological balance triggered by prolonged wet or dry underlying condition and variable extreme rainfall makes the rainfall-runoff process difficult to simulate with traditional models.

To this end, this study develops a novel vertically mixed model for complex. Anthony Ladson, in Approaches to Water Sensitive Urban Design, Increased runoff frequency. Runoff occurs more frequently because of urbanization. Small rainfall events of 1–2 mm will cause runoff from impervious surfaces (ASCE, ), but much more rainfall is usually required to produce runoff from grassland or forest (Pilgrim and Cordery, ).

Earth processes, which occur in land, air and ocean in different environment and at different scales, are very complex. Flooding is also a part of the complex processes, which need to be assessed accurately to know the accurate spatial and temporal changes of flooding and their causes.

Hydrological modelling has been used by several researchers in river and floodplain modelling for flood analysis. This paper demonstrates, by means of a systematic uncertainty analysis, that the use of outputs from more than one model can significantly improve conditional forecasts of discharges or water stages, provided the models are structurally different.

Discharge forecasts from two models and the actual forecasted discharge are assumed to form a three-dimensional joint probability density. RUNOFF MODELS EMPIRICAL CONCEPTUAL THEORETICAL LABO RATO Y ANALOG LUMPED TIME INVARIANT TIME VARIANT LINEAR NON LINEAR Figure 3: Classification of hydrological models (Singh, ) Regional Parameterization of Hydrological Models The use of hydrological models in ungauged sites and in large geographical regions becomes a more and.

This reason these different loss models are of interest is that the new version of Australian Rainfall and Runoff is recommending that the IL/CL model is used in place of the runoff coefficient model (Book 5, Section ).

In some areas, modelling approaches will need to change and this will have implications for flood estimates. Journal of Hydrology 9 () North-Holland Publishing Co., Amsterdam Not to be reproduced by photoprint or microfilm without written permission from the publisher RAINFALL-RUNOFF RELATIONSHIPS EXPRESSED BY DISTRIBUTION PARAMETERS EMIL O.

Description Use of analog models in the analysis of flood runoff FB2

FRIND Department of Civil Engineering, University of Toronto, Canada Abstract: This study is concerned with the statistical. Data on annual maximum floods as well as maximum summer floods were plotted on log-probability paper and theoretical flood-frequency curves determined q, the n Type III distribution.

Approximately figures relating to the rainfall-runoff data and analysis thereof have been included in the Appendices for future use.

Book 3 Peak Flow Estimation. Fitting to Gauged Data to obtain: • Flood Frequency if you have gauged data, • Regional Flood Models (rural catchments) - (Regional Flood Frequency Estimator - RFFE) • RFFE to apply as Step 4 when calculating flood flows to “check” design flows obtained.

Book 4 Catchment Simulation for Design Flood Estimation. The findings from the study will be used to predict maximum probable flood and 1% chance flood (base flood or year flood) to plan for flood mitigation in downstream towns and villages. A flood forecasting and flood warning system is needed for the area to protect the residential areas adjacent to the river and streams within the watershed.

The model is a physically-based and fully distributed hydrological model, which has already been successfully applied in several countries around the world ; SPHY. See for details on model and publications (HESS, Nature, etc) here. Just recently a new paper on climate change and mountain hydrology in PloS came out, using SPHY model, more info here.

Model the effect that low impact development controls have in retaining runoff before it enters the stormwater system.

Design and analyze pond and outlets Leverage PondMaker's guiding process through the confusing maze of pond design steps by following the step-by-step process that provides constant feedback on how the design is progressing.

cycle, and measurement techniques, (2) hydrologic analysis using hydrographs for rainfall-runoff, (3) statistical and flood frequency analysis, and (4) hydro-logic and hydraulic flood routing methods.

These chapters provide a lot of the basis for more applied modeling applications in later chapters of the text. The objective of this study was the development of models by which air temperature and precipitation data can be generated for spring periods for use in mathematical runoff models, to predict the range and probability of snowmelt floods.

In the upper midwestern United States, spring floods due to a combination of snowmelt and rainfall inflict. and flood protection criteria in the VSMP regulations. There is still a need to model the peak discharge and hydrologic and hydraulic response characteristics of the developed watershed.

However, as discussed in Chap the hierarchy of treatment objectives to achieve the runoff water quality requirements with runoff starts volume reduction. The text is divided into three main sections.

The first section, consisting of the first four chapters, covers traditional topics in hydrology such as: (1) weather, precipitation, evaporation, infiltration, hydrologic measurement, (2) rainfall-runoff analysis, (3) frequency analysis, and (4) flood Reviews: The Role of Rainfall–Runoff Models in Managing Future Risk Short-Term Future Risk: Flood Forecasting Data Requirements for Flood Forecasting Rainfall–Runoff Modelling for Flood Forecasting Case Study: Flood Forecasting in the .