Publications scientifique de l'Université de Mascara

Publications scientifiques des enseignants de l'Université de Mascara

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2013
LE ROLE DE LA RESPONSABILITE SOCIALE DES ENTREPRISES DANS LA REALISATION DE LA PERFORMANCE : ETUDE PAR QUESTIONNAIRE DE LA RSE AU SEIN DE SONATRACH
La revue : Valahian Journal of Economic Studies
Domaine : la responsabilité sociale des entreprises.
Mots Clés : responsabilité sociale des entreprises, partie prenantes, le système de management, Sonatrach, performance globale, système de pilotage
Auteur : Assia Hebri.
Issn : 2067 - 9459 Eissn : vol : Volume 4(18) ? NO. 2 ? 2013 , Num : 02 / 2013 , pp : 79-86
Résume :
La réalisation de la performance globale d’une entreprise, résulte de l’état d‘un rapport de force entre différentes manières de présenter et se représenter la place de l‘entreprise sur diverses échelles d’évaluation propres à chaque groupe d‘acteurs. La première étape dans l’opérationnalisation de cette approche par les parties prenantes consiste à identifier les différentes catégories d’acteurs à prendre en compte dans l’analyse. On va donc regroupé ses parties prenantes, dans les six grandes catégories influents sur la réalisation de la performance de l’entreprise étudié, ils sont: les clients, la communauté locale et la société civile, les fournisseurs, l’environnement, la flexibilité organisationnelle et l’adaptation au changement, les employés
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he ballistic dimer resonance in the one-dimensional disordered photonic crystals
La revue :
Domaine :
Mots Clés :
Auteur : H. Khalfoun, S. Bentata, M. Bouamoud, L. Henrard and C. Vandenbem
Issn : Eissn : vol : , Num : , pp :
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Ab-initio study of optoelectronic and magnetic properties of the orthorhombic NdMnO 3 perovskite
La revue :
Domaine :
Mots Clés :
Auteur : B. Bouadjemi, S. Bentata, A. Abbad and W. Benstaali
Issn : Eissn : vol : , Num : , pp :
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2015
Preference-Based Web Service Composition: Case-Based Planning Approach
La revue : I.J. Information Technology and Computer Science
Domaine : Intelligence Artificielle
Mots Clés : Web Service Composition; Case Based Planning; User Preferences.
Auteur : Y.Hachemi, SM.Benslimane
Issn : 2074-9007 Eissn : 2074-9015 vol : 07, Num : 06, pp : 74-82
Résume :
Web service selection is an indispensable process for web service composition. However it became a difficult task as many web services are increased on the web and mostly they offer similar functionalities, which service will be the best. User preferences are the key to retain only the best services for the composition. In this paper, we have proposed a web service composition model based on user preferences. To improve the process of web service composition we propose a case-based planning approach with user preferences which uses successful experiences in past to solve similar problems. In this paper we integrate user preferences in the phase of selection, adaptation and planning. Our main contributions are a new method of case retrieval, an extended algorithm of adaptation and planning with user preferences. Results obtained offer more than a solution to the user and taking both functional and nonfunctional requirements.
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First-principles calculations of magnetic, electronic and optical properties of binary GaN and ternary CrGaN, CuGaN
La revue :
Domaine :
Mots Clés :
Auteur : A. Abbad, W. Benstaali, H.A. Bentounes, S. Bentata and A. Belaidi
Issn : Eissn : vol : , Num : , pp :
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2019
Le pronom On dans la presse écrite : une marque d’effacement ou d’engagement énonciatifs ?
La revue : IHALAT
Domaine : Les sciences du langage
Mots Clés : locuteur, énonciateur, effacement énonciatif, engagement énonciatif, On.
Auteur : A. Mazot
Issn : 2602+7585 Eissn : vol : , Num : 4, pp : 228-240
Résume :
Notre étude s’inscrit dans le cadre de la théorie de la linguistique de l’énonciation. Notre corpus est composé d’un ensemble d’énoncés tirés de10 numéros du Quotidien d’Oran et qui s’inscrivent dans une période qui s’étend de janvier à octobre 2019. Nous nous attachons dans cette présente recherche à analyser une marque linguistique permettant au locuteur-journaliste d’introduire d’une façon explicite ou implicite son point de vue dans l’énoncé tout en exprimant des attitudes envers son énoncé et son interlocuteur. Nous nous inspirons des recherches menées par Vion ( 2001) et Rabatel ( 2003,2004, 2005) et qui consistent à proposer un appareil formel des procédés de l’effacement énonciatif. En s’inscrivant dans cette optique, nous proposons une analyse de l’usage du pronom On dans les articles du Quotidien d’Oran.
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Theoretical prediction of half metallic ferromagnetic full-Heusler alloys Cs2 CrGe
La revue :
Domaine :
Mots Clés :
Auteur : S. Cherid W. Benstaali, A. Abbad, S. Bentata, T. Lantri, B. Abbar,
Issn : Eissn : vol : , Num : , pp :
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2016
Study of a new electrostatic precipitator with asymmetrical wire-to-cylinder configuration for cement particles collection
La revue : Journal of Electrostatics
Domaine : Elsevier
Mots Clés : Electrostatic precipitator Corona discharge High resistivity particles Asymmetrical geometry Collection efficiency
Auteur : F Kherbouche, Y Benmimoun, A Tilmatine, A Zouaghi, N Zouzou
Issn : 0304-3886 Eissn : vol : 83, Num : , pp : 7-15
Résume :
In this paper, a new electrostatic precipitator (ESP) with asymmetrical wire-to-cylinder configuration is investigated experimentally and numerically. The main objective is to evaluate the collection efficiency of high resistivity particles.The electrical measurements show that the corona discharge behavior is similar to that obtained in symmetrical wire-to-cylinder configuration. Results show that the collection efficiency can reach 95% in the case of negative corona discharge. In order to understand the particle trajectories inside the ESP, the experimental results are compared with numerical simulation by using a coupled model. Numerical results indicate that particles can be collected on the collecting electrode backside.
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Electronic transmission in random trimer InAs/In x Ga1 superlattices
La revue :
Domaine :
Mots Clés :
Auteur : S.Terkhi, S.Bentata, R.Djelti, B.Bouadjemi
Issn : Eissn : vol : , Num : , pp :
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2018
Causality between economic growth and investment in the United Arab Emirates
La revue : Int. J. Economics and Business Research
Domaine : Economie
Mots Clés :
Auteur : Salem A Al-Jundi , Mohammed Seghir GUELLIL
Issn : 1756-9869 Eissn : vol : 15, Num : 4, pp : 524-540
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2019
Thermo-mechanical vibration analysis of non-local refined trigonometric shear deformable FG beams
La revue : International Journal of Hydromechatronics
Domaine : Civil Engineering
Mots Clés : FG nanobeam, vibration, thermal loading, shear deformation beam theory
Auteur : Mouffoki Abderrahmane, Aicha Bessaim, Houari Mohammed Sid Ahmed, Abdelhakim Kaci, Tounsi Abdelouahed, El Abbas Adda Bedia
Issn : 2515-0464 Eissn : 2515-0472 vol : 2, Num : 1, pp : 54-62
Résume :
In this article, thermo vibration analysis of functionally graded (FG) nanobeams subjected to linear and uniform temperature distribution is studied. The structure is modelled by new efficient shear beam theory considering the effect of shear deformation without shear correction factor. The mentioned theory satisfies the zero boundary traction conditions on the beam surfaces and can be used for transverse shear strains trigonometric distribution. Material properties of the nanostructure are assumed temperature-dependent and FG based on the distribution of power law. The influence of size scale is captured utilising Eringen theory of non-local elasticity. Based on the present theory, the motion equations are obtained using principle of Hamilton. It is found that the applied theory is very simple and leads to accurate results for thermo vibration analysis of FG nanobeams.
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2015
Factors Affecting CO2 Emissions in the BRICS Countries: A Panel Data Analysis
La revue : Procedia Economicsand Finance "Elsevier"
Domaine : Economie
Mots Clés :
Auteur : Yassine Zakarya GHOUALI, Mohammed Abbes SAHRAOUI, Mostéfa BELMOKADDEM, Mohammed Seghir GUELLIL
Issn : 2212-5671 Eissn : vol : 26, Num : , pp : 114-125
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GGA+U Study of electronic and magnetic properties of Pr(Fe/Cr)O3 cubic perovskites,
La revue : Journal of supercond.
Domaine :
Mots Clés :
Auteur : M. Rezaiguia, W. Benstaali, A. Abbad, S. Bentata, B. Bouhafs
Issn : Eissn : vol : , Num : , pp :
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2017
Climate change impact on rainfall spatiotemporal variability (Macta watershed case, Algeria)
La revue : Arabian Journal of Geosciences
Domaine : changement climatique, eau
Mots Clés : Climate change Water resources Spatial variability Drought Macta watershed Algeria 
Auteur : E. Abdelkader, H. Mohammed, B. Boumediene, B. Sid Ahmed
Issn : 1866-7511 Eissn : ******* vol : 10, Num : 22, pp : 1-14
Résume :
This work describes the climate change impact study on rainfall patterns in Macta watershed, located in the northwest of Algeria. The monthly rainfall data collection, verification and validation have built a database with 42 stations, each with 42 years of observations from 1970 to 2011. The study of annual total rainfall has identified a downward trend and quantifies the deficits that are within the observation time series. The division of the annual rainfall series into four periods allowed to highlighting the increase in inter-year temporal variability with the coefficient of variation increases from 17 to 27%. The study shows an annual rainfall deficit increment from 13 to 25%. The standard deviation values decrease significantly for the last two periods showing a spatial variability. Multivariate statistical study by the hierarchical clustering method resulted in the formation of station groups indicating the unification of monthly rainfall patterns.
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2018
Internet addiction and its Relation to some Psychological disorders among secondary school Students
La revue : Journal Of College Of Basic Education For Educational And Human Sciences
Domaine : Psychologie
Mots Clés : Internet Addiction, Psychological disorders Students, secondary school
Auteur : Mustapha Mansouri
Issn : 2304-3717 Eissn : 2312-8003 vol : , Num : 41, pp : 386-396
Résume :
The present study aim at identifying the level of Internet addiction and its Relation to some Psychological disorders among secondary school Students and to identify the differences in psychological disorders to the degree of addiction and differences Psychological disorders of Internet addicts according to gender variableThe sample consisted of 258 Studentswho taught in the secondary schools of Mascara in western Algeria; Applied the Internet addiction test and psychological disorders questionnairethe study revealed the following results: -There is a positive correlation between Internet addiction and psychological disorders among secondary school students - There are differences in psychological disorders among high and low Internet addicts of secondary school students in favor of addicts -There are differences in the psychological disorders of Internet addicts according to the gender variable in favor of females
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2017
Nodal solutions for fourth order elliptic equations with critical exponent on compact manifolds
La revue : Complex Variables and Elliptic Equations
Domaine : Differential geometry
Mots Clés : Fourth elliptic equation; Nodal solutions; critical Sobolev exponent
Auteur : B. Mohamed B. Mohammed
Issn : 17476933, 17476941 Eissn : vol : 63, Num : 10, pp : 1421-1437
Résume :
Using a variational method, we prove the existence of nodal solutions to prescribed scalar Q- curvature type equations on compact Riemannian manifolds with boundary. These equations are fourth-order elliptic equations with critical Sobolev growth.
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2017
Compact mole-fraction dependent modeling of I-V and C-V characteristics in AlxGa1-xN/GaN HEMTs
La revue : Journal of Computational Electronics
Domaine : Electronic
Mots Clés : I-V and C-V characteristics, Transconductance, AlxGa1−xN/GaN, HEMTs, Mole fraction, Threshold voltage, Numerical simulation, Atlas TCAD simulator
Auteur : Nawel Kermas, Bouaza Djellouli, Driss Bouguenna*, Wondwosen Eshetu, Oana Moldovan and Benjamin Iñiguez
Issn : 1569-8025 Eissn : 1572-8137 vol : 17, Num : 1, pp : 224–229
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2018
Parametric Study of the Mechanical Behavior of FSSW Welded Polymer Plates Using a New Form of Welding Tool
La revue : Defect and Diffusion Forum,
Domaine : sciences des matériaux
Mots Clés : Polymer PEHD; friction-stir spot welding FSSW; assemblage; welding parameters; tools geometries.
Auteur : Abdallah, OULD CHIKH El Bahri, MEDDAH Hadj Miloud, GUERAICHE Larbi, HACHELLAF Kaddour
Issn : 10120386 Eissn : vol : 389, Num : , pp : 205-215
Résume :
This research paper aims at studying the friction stir spot welding (FSSW) some of thermoplastic polymer materials (HDPE and HDPE-PMMA) using a specifal geometry tool without a pin. The effect of the tool geometry on the welds static resistance was studied via several tool shape, a flat shape below the tool, a shape with concavity angles ranging from 0° to 16°, a flange shape of the sharp-edged tool, a chamfered flange shape and a rounded shape. This work is done to increase the surface area of the weld and further to maximize the static strength of the friction stir spot welding. Experimental tests have been carried out under various operational parameters such as the tool rotation speed, tool plunge depth and dwell time. This later has been carried out to highlight the effect of the tool’s geometry and the operational parameters of the welding on the surface in virtue on static resistance of the friction stir spot welding of thermoplastic polymers. Tests of lap-shear at speed of 5m/s have showed that the tool geometry plays a very important part. This study shows that a FSSW welding tool with 4° concavity angle tool and a rounded flange shape gives the best welding quality for the polymers studied.
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2019
New poly(o-phenylenediamine)/modified-clay nanocomposites: A study on spectral, thermal, morphological and electrochemical characteristics
La revue : Journal of Molecular Structure
Domaine : Materials
Mots Clés : Conjugated polymer. Poly(orthophenylenediamine). Modifed-clay. Electrochemical properties
Auteur : I.Khelifa
Issn : 0022-2860 Eissn : vol : 1178, Num : , pp : 327-332
Résume :
This work describes the synthesis and characterization of new poly(o-phenylenediamine (PoPD)/modified-clay nanocomposite materials. For the synthesis, the raw clay (named as Mag) used in this study was from Maghnia (west Algeria), (Mag) clay was ion-exchanged with cobalt(II) sulfate hydrate and copper sulfate. The modified-clays were then dispersed in a oPD monomer-containing acidic solution to carry out in-situ intercalative oxidative polymerization by ammonium persulfate. XRF and XRD characterization reveal the success of ion-exchange to form highly intercalated Mag-Co and Mag-Cu clays. After polymerization, the disappearance of the interlayer-spacing diffraction peak for the PoPD-Mag-Cu and PoPD-Mag-Co nanocomposites points out fully exfoliation of the clay structure. The formation of intercalated PoPD into modified-clay nanocomposites was confirmed by XRD, TEM, TG analysis, FTIR spectroscopy and UV–vis studies. The nanocomposites show optical properties and the redox processes observed by cyclic voltammetry indicate that the reported polymerization into modified-clays leads to electroactive hybrid materials. All these properties make these polymer/clay nanocomposites attractive materials for multiple applications.
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Optoelectronic properties of transition metals doped cubic Cadmium Sulfide
La revue :
Domaine :
Mots Clés :
Auteur : A. Abbad, H. A. Bentounes, W. Benstaali, S. Bentata, B. Bouadjemi
Issn : Eissn : vol : , Num : , pp :
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2018
Les structures de contact généralisées
La revue : Univesity of Tlemcen, Algeria.
Domaine : Geometry
Mots Clés : generalized Kählerian manifolds, generalized contact structures, generalized almost complex structures.
Auteur : Bouzir Habib
Issn : Eissn : vol : , Num : , pp :
Résume :
Le concept de la géométrie généralisée est dû à Nigel Hitchin (\cite{hg}, 2003), et elle est intéressante dans la théorie physique de la supersymétrie. En géométrie généralisée on étudie non pas le fibré tangent d'une variété différentiable $M$, qui est noté $TM$ mais plutôt la somme du fibré tangent et du fibré cotangent, que nous noterons par $\mathds{T}M:=TM \oplus T^{*}M$, qu'on appel le fibré de Pontryagin (ou le fibré tangent généralisé) sur la variété $M$ avec la somme de Whitney $TM \oplus T^{*}M$ des fibrés tangent et cotangent.\\
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2017
Mining Negative Correlation Biclusters from Gene Expression Data using Generic Association Rules
La revue : Procedia Computer Science
Domaine : Informatique
Mots Clés : Biclustering; Negative correlations; Generic Association Rules ; Data mining; Bioinformatic; DNA microarray data.
Auteur : Amina Houari, Wassim Ayadi, Sadok Ben Yahia
Issn : 1877-0509 Eissn : vol : 112, Num : , pp : 278-287
Résume :
A majority of existing biclustering algorithms for microarrays data focus only on extracting biclusters with positive correlations of genes. Nevertheless, biological studies show that a group of biologically significant genes may exhibit negative correlations. In this paper, we propose a new biclustering algorithm, called NBic-ARM. Based on Generic Association Rules, our algorithm identifies negatively-correlated genes. To assess NBic-ARM’s performance, we carried out exhaustive experiments on three real-life datasets. Our results prove NBic-ARM’s ability to identify statistically and biologically significant biclusters.
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إستراتيجية الحجاج عند البشير الإبراهيمي- خطبة مسجد كتشاوة أنموذجاً
La revue : مجلة فصل الخطاب
Domaine : اللغة والأدب العربي
Mots Clés : البشير الإبراهيمي، الحجاج، التداولية، اللسانيات، الدلالة
Auteur :
Issn : 2335-1071 Eissn : 2602-5922 vol : 02, Num : 05, pp : 73-91
Résume :
يمثّل الحجاج الركن الأساس لفن الخطابة، بسبب حاجة هذه الأخيرة لمختلف الأدوات التي تمكّنها من التأثير في المتلقي وتغيير قناعاته، وهو ما نلمس أثره بوضوح في خطبة الشيخ الإبراهيمي التي ألقاها في مسجد كتشاوة، حيث استخدم ترسانة من الآليات الحجاجية، معتمدا على ذخيرة لغوية وثقافية هائلة، سمحت بتنويع المنظومة الحجاجية عبر ثلاثة أسس؛ الأساس الاستشهادي، والأساس الأسلوبي، والأساس المنطقي. وقد تفرّع كلّ واحد منها إلى بنيات حجاجية أصغر، سمحت في النهاية ببناء شبكة حجاجية قوية، ومترابطة، ومنسجمة، تجمع بين الإقناع والإمتاع.
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2017
Generalized Kählerian manifolds and transformation of generalized contact structures
La revue : ARCHIVUM MATHEMATICUM (BRNO)
Domaine : Mathématiques
Mots Clés : product manifolds, trans-Sasakian manifolds, generalized Kählerian manifolds, generalized contact structures, transformation of generalized almost contact structures, generalized almost complex structures.
Auteur : BOUZIR Habib, BELDJILALI gherici, BELKHELFA mohamed, AISSA Wade
Issn : 1212-5059 Eissn : 0044-8753 vol : 53, Num : 1, pp : 35-48
Résume :
The aim of this paper is two-fold. First, new generalized Kähler manifolds are constructed starting from both classical almost contact metric and almost Kählerian manifolds. Second, the transformation construction on classical Riemannian manifolds is extended to the generalized geometry setting
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Ab-initio study of structural, electronic and magnetic properties of CdTe doped transition metal Co
La revue :
Domaine :
Mots Clés :
Auteur : A. Zitouni, S. Bentata, W. Benstaali and B.Abbar
Issn : Eissn : vol : , Num : , pp :
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Study of Two-Stage-Type Electrostatic Precipitator in Axisymmetric Configuration Applied to Finely Ground Lignocellulosic Materials
La revue : IEEE Transactions on Industry Applications
Domaine :
Mots Clés : Corona discharge; Electrostatic hazards; Electrostatic precipitators; Finely ground lignocellulosic materials; Particle collection efficiency; Triode-type electrodes.
Auteur :  Zouzou, Noureddine & Mayer-Laigle, Claire & Rouau, Xavier & Zouaghi, Ayyoub & Fouad, Kherbouche & Dascalescu,L
Issn : 0093-9994 Eissn : 1939-9367 vol : 55, Num : 3, pp : 3114 - 3121
Résume :
The main objective of this paper is to develop a novel two-stage-type electrostatic precipitator to collect finely ground lignocellulosic particles. To prevent the danger of explosion of such a powdery material, ion generation and particle charging processes are separated. Main results show that the particles can be highly charged in a two-coaxial-cylinders triode-type device, which also facilitates their collection. For instance, the collection efficiency reaches 92 % for particle size of about 0.3 μm, and exceeds 99% for particle size greater than 2 μm.
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2020
Parametric Study Of Friction Stir Spot Welding (FSSW) For Polymer Materials Case Of High Density Polyethylene Sheets: Experimental And Numerical Study
La revue : Frattura ed Integrità Strutturale
Domaine :
Mots Clés :
Auteur : Djilali Benyerou, El Bahri Ould Chikh, Habib Khellafi, Hadj Miloud Meddah, Ali Benhamena, Kaddour Hachelaf, Abdellah Lounis
Issn : Eissn : vol : 15, Num : 55, pp :
Résume :
Friction stir spot welding (FSSW) is a very important part of conventional friction stir welding (FSW) which can be a replacement for riveted assemblies and resistance spot welding. This technique provides high quality joints compared to conventional welding processes. Friction stir spot welding (FSSW) is a new technology adopted to join various types of metals such as titanium, aluminum, magnesium. It is also used for welding polymer materials which are difficult to weld by the conventional welding process. In various industrial applications, high density polyethylene (HDPE) becomes the most used material. The parameters and mechanical properties of the welds are the major problems in the welding processes. In this paper, we have presented a contribution in finite element modeling of the friction stir spot welding process (FSSW) using Abaqus as a finite element solver. The objective of this paper is to study the HDPE plates resistance of stir spot welding joints (FSSW). First, we show the experimental tests results of high-density polyethylene (HDPE) plates assembled by friction stir spot welding (FSSW). Three-dimensional numerical modeling by the finite element method makes it possible to determine the best representation of the weld joint for a good prediction of its behavior. Comparison of the results shows that there is a good agreement between the numerical modeling predictions and the experimental results.
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2018
Characterization of thermally affected steels by nanoindentation
La revue : Recueil de mécanique
Domaine : sciences des matériaux
Mots Clés : Heat treatments; Characterization; Nanoindentation; Modulus of elasticity; Hardness
Auteur : Samir Habibi, Noureddine Mahmoudi, Benaoumeur Aour, Laid aminallah, Ould Chikh el bahri
Issn : Eissn : vol : 2, Num : 002, pp : 168 – 174
Résume :
The thermal affectation is the basis of metallurgical modifications of the base metal which can induce fragilities, decreases in mechanical strength, lack of ductility ... These modifications depend on the material examined, the process used, the mode of operation followed ... This research is devoted to the experimental study, whose objective is the study of low-carbon steels who sustained of the various heat treatments. Then, the instrumented nanoindentation test is developed to analyze the characteristic loading and unloading curves of the examined specimens. In this case, we focus on the effect of heat treatments on the metallographic examination and the mechanical properties of the studied steels. At the same time, we study the coherence of the results obtained between the heat treatment and the nanoindentation process in the determination of elasticity modulus and hardness.
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2016
The Granger Causality Effect between Cardiorespiratory Hemodynamic Signals
La revue : Springer International Publishing Switzerland 2016, Forging Connections between Computational Mathematics and Computational Geometry, Springer Proceedings in Mathematics & Statistics 124, DOI 10.5176/2251-1911_CMCGS14.50_23
Domaine : Mathematics, Statistics and Biomedical
Mots Clés : Direction of information, Cardiorespiratory hemodynamic signals, Granger causality, Multivariate study, (MGH/MF) waveform database
Auteur : Samir Ghouali, Mohammed Feham, Yassine Zakarya Ghouali
Issn : 2194-1009 Eissn : vol : , Num : , pp : 275-300
Résume :
Granger causality (GC) is one of the most popular measures to reveal causality influence of time series based on the estimated linear regression model and has been widely applied in economics and neuroscience due to its reliability, clarity, and robustness. Granger causality has recently received increasing attention to study causal interactions of neurophysiological data; in this chapter we have developed a model of causality between the respiratory, hemodynamic, and cardiac signals, more specifically, a study based on the Granger causality between three ECG leads, blood pressure, central venous pressure, pulmonary arterial pressure, respiratory impedance, and airway CO2. We selected 187 patients of 250 for our study, taken from Montreal General Hospital/MF (Massachusetts General Hospital/Marquette Foundation) databases. These signals are ideal for understanding causality and coupling (unidirectional or bidirectional). In this approach we aim to analyze and understand the interactions between the signals mentioned above, and identify the significance of this interaction. The originality of this chapter is the number of variables selected for the study. Unlike the majority of studies that are conducted only with two variables, our study is multidimensional. The main advantage of a multidimensional and multivariable model is to solve a myriad of problems which is not the case in the two-dimensional studies.
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2016
Sinuosity-Driven Water Pressure Distribution on Slope of Slightly-Curved Riparian Zone: Analytical Solution Based on Small-disturbance Theory and Comparison to Experiments
La revue : Water
Domaine :
Mots Clés : riparian zone; slightly-curved; water pressure distribution; small-disturbance theory
Auteur : Jihong Xia, Genting Yu, Junqiang Lin, Weijie Cao, Zihan Yi, Lihuai Lin, Laounia Nehal
Issn : Eissn : vol : 8, Num : 2, pp : 61
Résume :
A curved riparian zone can create highly complex flow patterns that have a great effect on erosion, pollutant transport, surface water-groundwater exchange and habitat qualities. The small-disturbance theory has been applied to derive the analytical solutions of pressure distributions along a sinusoidal riverbank. Experiments have also been performed to test the hydrodynamic and geomorphic effects on pressure distribution and to verify the applicability of the derived expressions. The derived expressions were simple, accurate and agreed remarkably well with experimental results for the riparian banks with a low degree of curvature. On the contrary, when a riparian bank had a high degree of curvature, these expressions applying the approach of small-disturbance, could not effectively estimate the pressure distributions for a complex bank boundary or complex flow conditions. Moreover, sensitive analysis has indicated that the disturbed pressures along the riparian banks increased with increasing Froude number Fr, as well as the ratio of bank amplitude to wavelength a/. However, a/ has been found to have more significant influence on pressure variation in subcritical flow.
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