Flow Distribution in Compound Channels

Wormleaton, Peter R.; Hadjipanos, Panos

doi:10.1061/(asce)0733-9429(1985)111:2(357)

Cited by 49 publications

(10 citation statements)

References 1 publication

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“…2. The dataset were collected from the published article including Knight et al (1984), Wormleaton and Hadjipanos (1985), Wormleaton and Merrett (1990) (UK Flood Channel Facility), Tang et al (1999), Seckin (2004), Lenton and Muller (2012), Atabay and Knight (2006), Atabay and Knight (2006), Khatua et al (2012), Mohanty and Khatua (2014). …”

Section: Methodsmentioning

confidence: 99%

Predictive modeling of discharge of flow in compound open channel using radial basis neural network

Parsaie

Najafian

Shamsi

2016

Model. Earth Syst. Environ.

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Predicting the flow discharge in open channel is the main parameters in the flood management. The concept of the compound open channel is the accurate approach for modeling the natural streams. Several ways as analytical approaches and artificial intelligence methods have been proposed for predicting the discharge in rivers in term of compound open channel concepts. In this paper the single channel method (SCM), coherence method (COHM), and divided channel method (DCM) as common analytical approaches were used to predict the discharge in the compound open channel and in follow to achieve more accuracy in flow discharge prediction the radian basis neural network (RBF) was developed. The performance of RBF was compared with other types of transfer function governed on neurons of neural network. The results showed that the DCM with horizontal separated boundary among the subsections with correlation of determination (R 2 = 0.76) is accurate through the analytical approaches. Assessing the results of the MLP model showed that this model with (R 2 = 0.95) is a bit more accurate than the RBF (R 2 = 0.85) and analytical approaches.

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Section: Methodsmentioning

confidence: 99%

Predictive modeling of discharge of flow in compound open channel using radial basis neural network

Parsaie

Najafian

Shamsi

2016

Model. Earth Syst. Environ.

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“…Knight ve arkadaşları [19], DCM için belli bir derinlikte debiyi oldukça iyi tahmin edebilmesine rağmen taşkın yataklarında ve ana kanaldaki toplam debinin yüzdesinin doğru olmayabileceğini belirtmişlerdir. Aslında, Wormleaton ve Hadjipanos [20], hesaplanan kesit debilerindeki hatanın % 60 gibi yüksek bir değere ulaşabileceğini göstermişlerdir.…”

Section: şEkil 2 Bölünmüş Kanal Metodu (Dcm)unclassified

Bileşik Kesitli Kanallarda Debi Hesabı

Mamak

Umarusman²,

Kaya

2017

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖzBir ana kanal ve taşkın yataklarından oluşan bileşik kesitli kanallarda birçok debi hesaplama yöntemi mevcuttur. Bu çalışmada, klasik yöntemlerden olan SCM (Tek Kanal Metodu) ve DCM (Bölünmüş Kanal Metodu) yöntemleri kullanılarak debi hesaplaması yapılmıştır. Literatürde verilen bileşik kesitli bir kanala uygulanan bu yöntemler ile yapılan hesaplamalar sonucunda elde edilen hesap debileriyle deneysel debi değerleri karşılaştırılmış ve bu klasik yöntemlerin geçerliliği incelenmiştir. The Computation of Discharge Capacity in Compound Channels AbstractThere are many computation methods for the discharge capacity of compound channels consisting of a main channel and its floodplains. In this study, the discharge computation is carried out using Single Channel Method (SCM) and Divided Channel Method (DCM) known as classical methods. These methods have been applied to a compound channel given in literature. The computed discharge values were compared with the experimental discharge values, and the validity of these classical methods is investigated.

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“…However, their results show that conventional calculation methods result in larger errors. Wormleaton et al (1982) and Wormleaton and Hadjipanos (1985) also discussed, in the case of compound sections, the horizontal division through the junction point between the main channel and the floodplains. Their studies show that these subdivision methods cannot assess well the discharge in compound channels.…”

Section: Introductionmentioning

confidence: 99%

Computation of vertically averaged velocities in irregular sections of straight channels

Spada

Tucciarelli

Sinagra

et al. 2015

Hydrol. Earth Syst. Sci.

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Abstract. Two new methods for vertically averaged velocity computation are presented, validated and compared with other available formulas. The first method derives from the well-known Huthoff algorithm, which is first shown to be dependent on the way the river cross section is discretized into several subsections. The second method assumes the vertically averaged longitudinal velocity to be a function only of the friction factor and of the so-called "local hydraulic radius", computed as the ratio between the integral of the elementary areas around a given vertical and the integral of the elementary solid boundaries around the same vertical. Both integrals are weighted with a linear shape function equal to zero at a distance from the integration variable which is proportional to the water depth according to an empirical coefficient β. Both formulas are validated against (1) laboratory experimental data, (2) discharge hydrographs measured in a real site, where the friction factor is estimated from an unsteady-state analysis of water levels recorded in two different river cross sections, and (3) the 3-D solution obtained using the commercial ANSYS CFX code, computing the steady-state uniform flow in a cross section of the Alzette River.

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Flow Distribution in Compound Channels

Cited by 49 publications

References 1 publication

Predictive modeling of discharge of flow in compound open channel using radial basis neural network

Predictive modeling of discharge of flow in compound open channel using radial basis neural network

Bileşik Kesitli Kanallarda Debi Hesabı

Computation of vertically averaged velocities in irregular sections of straight channels

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