Larbi Houichi

University of Batna 2

In this contribution, we assess the capabilities of monthly pan evaporation estimation using two methods: i) the first is a purely stochastic model designed by ARIMA (autoregressive with integrated moving average), which is based only on endogenous variables, and ii) the second is derived from Dalton's physical approach based on exogenous variables...

The main objective of this study is to develop a new adjusted Turc equation through introduction of the monthly adaptation coefficients implicitly deduced from the influence of wind and air humidity; and on the other hand, to highlight the wind speed influence on the estimation of the potential evapotranspiration (PET) as well as the synthetic mode...

This research paper investigates a cubist method as a rule-based regression predictive model for index rainfall (IR) estimation. The IR is required both in the regional frequency analysis procedure and in the evaluation of probable maximum precipitation. This IR is still considered a basic means in the rainfall-runoff transfer process. Data used in...

The aim of the current paper is to revisit the performance of spectral clustering algorithms for water distribution networks. In the literature, there have been attempts to introduce improved algorithms based on graph theory. We focus on a class of these algorithms that applies the concepts of the spectral clustering approach. We assess the perform...

The difficulty of the problem of the flow hydraulics in compound channels is due to the implicit interaction between the floodplains and the main channel, characterizing every particular shape of the compound channel. The problem is much more complicated when it comes to an energy dissipator like a hydraulic jump as is the case in the present study...

Probable maximum precipitation (PMP) is considered as a principal factor for estimating probable maximum floods (PMF) when designing various hydraulic structures. The estimation of PMP by the Hershfield statistical method was adopted in this paper for 112 rainfall stations in the three Algerian coastal basins (coastal region). This method is based...

This study surveys two rule-based regression models for index rainfall (IR) estimation. The so-called IR is frequently considered a fundamental variable in the rainfall-runoff modeling. It is also required in regional frequency analysis (RFA). For this aspect, no case study has been carried out so far in the Algerian context. The data used in this...

The exactness in determining the radius of curvature of the downstream toe of a spillway ensures a smooth hydraulic transit from the upstream to the downstream of the structure. The literature mentions that this radius takes half the height of the dam if the latter is less than 10 m. Beyond this value, the values of the connection radius are numeri...

Probable maximum precipitation (PMP) is considered as a principal factor for estimating probable maximum floods (PMF) when designing various hydraulic structures. The estimation of PMP by the Hershfield statistical method was adopted in this paper for 112 rainfall stations in the three Algerian coastal basins (coastal region). This method is based...

Abstract: This contribution assesses the predictive capacity of monthly inflow of two stochastic models called autoregressive integrated moving average (ARIMA) and TBATS and highlights the influence of climate type on their performances. These are the inflows to three dams in three distinct climates: semi-arid, subhumid and humid. The actual inflow...

This chapter aims to investigate the capabilities and usefulness of two new data-driven techniques: optimally pruned extreme learning machine (OPELM) and online sequential extreme learning machine (OSELM) newly applied and compared for predicting daily reference evapotranspiration (ET0) in the Mediterranean region of Algeria. Using large data sets...

Evaporation (EP) from dams’ reservoirs measured using pans is one of the most important methods adopted for quantifying the loss of water through evaporation. Black box artificial intelligence techniques (AI) have been developed as alternative approaches for quantifying evaporation, and several kinds of models have been proposed worldwide. The pres...

Monitoring water quality is of great importance and mainly adopted for water pollution control of conventional and non-conventional water resources. Generally, water quality is evaluated using several indicators, including chemical oxygen demand (COD), biochemical oxygen demand (BOD) and dissolved oxygen concentration (DO). In the present investiga...

RESUME La présente étude s'intéresse aux conditions hydrauliques de petits barrages déversoirs submergés. En se basant sur un schéma de définition, l'étude propose une relation simple, ponctuée d'une courbe unique, qui permet de prédire la nature noyée ou dénoyée du barrage déversoir. La relation obtenue est la solution d'une équation de second ord...

Hydrology-related studies often require complete datasets. However, missing data is an unavoidable reality. In this regard, the imputed data could fulfill the same role as the observed ones, while they are uncertain and just estimated. The aim of this study is to compare the performance of four simple imputation variants derived from the principal...

Over the last few years, the uses of artificial intelligence techniques (AI) for modelling daily reference evapotranspiration (ET0) have become more popular and a considerable amount of models were successfully applied to the problem. Therefore, in the present paper, we propose a new evolving connectionist (ECoS) approaches for modelling daily refe...

Water quality index (WQI) is a mathematical tool used to transform large quantities of water quality data into a single number which present water quality level. The aim of the present study is to evaluate the quality of Koudiat Medouar Dam in Batna (Algeria) to assess its suitability for drinking purposes. Samples were assessed for ten (10) physic...

L'étude est consacrée à la citation de quelques modèles IDF usuels issus de la bibliographie, notamment le modèle adopté par l'agence nationale des ressources hydrauliques (ANRH) qui est testé dans une vision comparative. Douze autres modèles, à deux, à trois, à quatre et à cinq paramètres, sont alors délibérément appliqués et testés. Le choix du m...

In this paper, theoretical developments, regarding the establishment of dimensionless relationships for sequent depths ratio and relative energy loss of hydraulic jumps are achieved in a straight rectangular compound channel. These relationships were given with and without consideration of a volume force Fx, which is assimilated by analogy to Borda...

The present work deals with optimal reservoir operation in an arid region which vulnerability to erosion is identified by a rapid sedimentation of reservoirs. An optimized curve of reservoir sedimentation as a result of sediment-water power relationship will be used for future estimation of trapped sediment volume in the reservoir. Implicitly, this...

We have developed an ANN model for predicting the performance index (Y) using data from Fouka desalination plant in Algeria, based on both Principal Component Analysis (PCA) and Correlation Matrix (CM) as techniques for selecting input parameters. Two models were established with the same output which is the performance index (Y) and using BFGS tra...

Design engineers are often faced with the complex task of designing new collection systems. Methods based on Manning’s equation are frequently used due to the availability of tables and graphs, which simplify the calculations. These methods lack accuracy except when laborious numerical methods are utilized. The design of a collection system seeks t...

Design engineers are often faced with the complex task of designing new collection systems. Methods based on Manning’s equation are frequently used due to the availability of tables and graphs, which simplify the calculations. These methods lack accuracy except when laborious numerical methods are utilized. The design of a collection system seeks t...

This paper presents a new approach for the computation of flow velocity in pipes arranged in parallel based on an analytic development. The estimation of the flow parameters using existing methods requires trial and error procedures. The assessment of flow velocity is of great importance in flow measurement methods and in the design of drainage net...

The aim of this study is to model the daily reference evapotranspiration (ET0) in the Mediterranean region of Algiers, Algeria country, using Adaptive Neuro-fuzzy inference system (ANFIS) and multiple linear regression (MLR) models. Various daily climatic data, i.e. daily mean relative humidity, sunshine duration, maximum, minimum and mean air temp...

Drainage and sewer network runs mostly under free surface flow condition. Among the characteristics which are important for practitioner are the flow velocity and water surface angle. The computation of these parameters in partially full pipes using Manning equation is implicit and requires iterative and laborious calculation methods. The goal of t...

Modelling of hydraulic characteristics of jump using theoretical and empirical models has always been a difficult task. The length of jump may be defined as the distance measured from the toe of the jump to the location of the surface rise. Due to high turbulence this length cannot be determined easily by theory. However, it has been investigated e...

Modelling of hydraulic characteristics of jump using theoretical and empirical models has always been a difficult task. The length of jump may be defined as the distance measured from the toe of the jump to the location of the surface rise. Due to high turbulence this length cannot be determined easily by theory. However, it has been investigated e...

Estimation of reference evapotranspiration (ET0) is needed to support irrigation design and scheduling, and watershed hydrology studies. There are many available methods to estimate evapotranspiration from a water surface, comprising both direct and indirect methods. In the first part of this study, the generalized regression neural networks model...

Résumé : La coagulation est l'une des étapes les plus importantes dans le traitement des eaux. La difficulté principale est de déterminer la dose optimale du coagulant à injecter en fonction des caractéristiques de l'eau brute. Un mauvais contrôle de ce procédé peut entraîner une augmentation importante des coûts de fonctionnement et le non-respect...

Résumé L'importance des enjeux financiers impliqués dans la valorisation des boues produites par les stations d'épuration des eaux usées urbaines impose une gestion motivée et maîtrisée. A cet effet la modélisation de la quantité de boue produite par la station d'épuration (STEP) de la ville de Batna constitue une préoccupation majeure pour le gest...

The slope stability analysis is routinely performed by engineers to evaluate the stability of embankment dams, road embankments, river training works, excavations and retaining walls. To ensure the geotechnical safety of the dam, the slope of embankment must be correctly designed and constructed. In this work, by applying the modified method of Bis...

The management of the superficial water resources can be optimal if the random scenarios of the liquid flow, which are forecasting the future, are consistency generated. The present communication explains an adequate and debatable methodology of prediction of the liquid contributions flowing by wadi "Reboâ" for Koudiat Medouar Dam in Algeria countr...

The rains of March 1974 reached strong values versus the normal and reigned geographically for width of 150 km along north Algeria, extending from Cherchell to Bedjaia, causing human damage (52 dead) and materials (4570 destroyed houses, 130 insulated villages, 13 destroyed bridges and more than 18000 disaster victims…). In the present contribution...

Le calcul de l'écoulement turbulent en conduit en charge, est fréquemment rencontré dans la vie pratique des ingénieurs hydrauliciens; ce type d'écoulement est gouverné par la relation fonctionnelle suivante: , où Q est le débit volume; J est le gradient de la perte de charge, D est le diamètre interne de la conduite, est la hauteur moyenne des asp...

Two types of spillways in physical models were tested. The first one is a weir considered as an over-flow spillway with Creager profile, the second is a siphon spillway with the same longitudinal profile. Concerning the siphon, the study recognised a clear distinction for no complete prime areas relating to low heads and complete prime areas for th...

Two types of spillways in physical models were tested. The first one is a weir considered as an over-flow spillway with Creager profile, the second is a siphon spillway with the same longitudinal profile. Concerning the siphon, the study recognised a clear distinction for no complete prime areas relating to low heads and complete prime areas for th...

Using a definition sketch, a theoretical development is proposed to define the functional relationship between the various parameters of the flow at the toe of an overspill dam. After conversion to dimensionless form, the USBR diagram for determining the velocity at the toe of a steeply-sloping spillway is replaced by a single curve. With the data...

One type of spillways for dams in physical models is deliberately tested. It is a siphon spillway having the Creager-Ofitserov profile, studied in four alternative models with various configurations based on variation of the cross section. The study highlighted a clear distinction for not and almost complete prime areas for low head and complete pr...

Water plays a very important role in the socio- economic development of the country and if its shortage endures, that may affect the country's economy, particularity the agriculture, a big user of water. Problem concerning water, are to be very complex in the future (population growth, climate changes, etc…). For this purpose, water management aims...