Fuzzy unit hydrograph

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August undefined, 2024

WebThis study aims to assess the short-term response of groundwater to the main hydro-meteorological variables of drought in a coastal unconfined aquifer. For this purpose, a multiple fuzzy linear regression-based methodology is implemented in order to relate rainfall, streamflow and the potential evapotranspiration to groundwater. Fuzzy … WebJun 22, 2010 · surface runoff hydrograph (SRH) resulting from one inch of excess rainfall generated uniformly over the drainage area at a constant rate for an effective unit time duration. Sherman originally used the word “unit” to denote a unit of time, but since then it has often been interpreted as a unit depth of excess rainfall.

Unit hydrograph identification based on fuzzy regression analysis

WebA unit hydrograph for a given catchment shows the flow resulting from unit effective rainfall in unit time on the catchment, for example the flow following, say, 10 mm effective rainfall falling in 1 hour. It assumes the rainfall is uniform over the catchment and that run-off increases linearly with effective rainfall. Webinstantaneous unit hydrograph model of Nash. Parameters of n and k can be obtained through various estimation methods. Peak time, tP, can be computed through derivation of Eq. (1) related to t and letting dh/dt=0: tp=k(n-1) (2) Total time lag, tL, is: tL=nk (3) The lag time (lag of a watershed) is defined as time gif inspiration for coworkers

Fuzzy logic-based rainfall–runoff modelling using soil …

WebJul 1, 2016 · Unit hydrograph identification based on fuzzy regression analysis 2024, Evolving Systems Flood hydrograph modeling using artificial neural network and … Webcharacterized by a low number (from 2 to 5) of input variables. Bárdossy (2006) proposed a fuzzy unit hydrograph to account for the number of uncertainties raised from both model assumptions and data acquisition in representing the … WebThe definition of a unit hydrograph implies the following: 1. The unit hydrograph represents the lumped response of the catchment to a unit rainfall excess of D-h duration to produce a direct runoff hydrograph. It relates only the direct runoff to rainfall excess. gif inspirational quotes for assistants

Hydrograph estimation with fuzzy chain model - ScienceDirect

WebThe unit hydrograph represents the lumped response of the catchment to a unit rainfall excess of D-h duration to produce a direct runoff hydrograph. It relates only the direct … Webunit hydrograph element u m (see equation (2)) is a fuzzy number U^ and, equally, each p m element (see equation (2)) is also fuzzy P^. As a consequence of the application of … fruity asteroidsWebApr 14, 2024 · Pursuant to the Offering, the Company issued an aggregate of 19,237,666 units of the Company (the “ Units ”) at an issue price of $0.12 per Unit for aggregate … gif inspiration

"WebApr 1, 2024 · Several methodologies have been proposed for the estimation of direct surface runoff (DSR) hydrographs from isolated rainfall events in order to provide tools for studies on natural hazards caused by floods, particularly the Unit Hydrograph (UH) ( Sherman, 1932) and the Instantaneous Unit Hydrograph (IUH) ( Clark, 1945 ). " - Fuzzy unit hydrograph

Fuzzy unit hydrograph

WebAug 13, 2024 · that a unit hydrograph can be described based only on the watershed area when fuzzy logic models are applied. Keywords: physical model; watershed topography; hydrograph shape; synthetic... WebThe unit hydrograph method, frequently used for representing the rainfall-runoff transformation, is subject to a number of uncertainties related both to the model …

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Web[46] The fuzzy unit hydrograph was applied to a set of different catchments in Southwest Germany. The parameters were assessed using observed events. Important … WebAug 13, 2024 · The main finding is that a unit hydrograph can be described based only on the watershed area when fuzzy logic models are applied. Keywords: physical model; watershed topography; hydrograph shape; synthetic unit hydrograph; polynomial regression; fuzzy logic 1. Introduction

WebJun 25, 2024 · This work is focused on enhancing models of the third category using fuzzy sets and logic. Lumped models estimate the ﬂood hydrograph at a downstream section of the river from the ﬂood hydrograph at the upstream section without considering explicitly the river characteristics between the upstream and the downstream sections. WebJul 1, 2016 · In this paper, fuzzy logic inference principles are used and a fuzzy chain model (FCM) is developed for estimation of peak discharge and hydrograph generation based on available numerical and linguistic data. The application is presented for a small basin, Ayamama basin, within Istanbul City, Turkey. Section snippets Study area and data

WebMar 2, 2016 · 2.3.6 The Unit Hydrograph The Unit Hydrograph (abbreviated as UH) of a drainage basin is defined as a hydrograph of direct runoff resulting from one unit of effective rainfall which is uniformly distributed over the basin at a uniform rate during the specified period of time known as unit time or unit duration. WebFeb 1, 2006 · The unit hydrograph method, frequently used for representing the rainfall-runoff transformation, is subject to a number of uncertainties related both to the model …

WebMay 4, 2024 · The problem of determining the fuzzy components of the unit hydrograph is transformed into a linear optimization approach based on the fuzzy linear regression …

WebFeb 1, 2006 · It is assumed that the unit hydrograph can be represented through a fuzzy schematization, and effective precipitation is also considered a fuzzy series; by applying … gif in steamWebMay 29, 2016 · Fuzzy set theory is used to model imprecise variogram parameters. Kriging predictions and kriging variances are calculated as fuzzy numbers, characterized by … gif insulinaWebThe fuzziness of the unit hydrograph has been addressed in the literature. Firstly, Bárdossy et al. (2006) proposed a hybrid method to determine the unit hydrograph including the uncertainty within the framework of fuzzy set and logic. fruity audioWeb(210–VI–NEH, March 2007) 16–v Part 630 National Engineering Handbook Chapter 16 Hydrographs Figure 16A–1 Dimensionless curvilinear unit hydrograph and equiva- 16A–1 lent triangular hydrograph Figure 16B–1 Peak rate factor = 600 16B–1 Figure 16B–2 Peak rate factor = 550 16B–2 Figure 16B–3 Peak rate factor = 500 16B–3 Figure 16B–4 Peak … gif instrumentos gif inspirational photosWebFeb 1, 2006 · It is assumed that the unit hydrograph can be represented through a fuzzy schematization, and effective precipitation is also considered a fuzzy series; by … fruity artinyaWebJul 1, 2016 · After the peak discharge and delay time calculations, the hydrograph is generated from the dimensionless unit hydrograph values. 3.1. Fuzzy chain model. Digital computers have the ability to process uncertain, incomplete, vague and linguistic information by means of approximate reasoning through fuzzy logic principles (Zadeh, 1965, Şen, … gif insulin