
Mojtaba SaneieSoil Conservation and Watershed Management Research · River and coastal engineering
Mojtaba Saneie
PhD in Hydraulic Structures Engineering
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89
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Introduction
Additional affiliations
July 1988 - present
Education
September 1995 - May 2000
Publications
Publications (89)
This paper has studied the performance of different triangular labyrinth side weirs. To evaluate the effectiveness of the various schemes: triangulating, adding sloped floors to the cycles, apex overhanging, and changing to an asymmetry plan were experimentally investigated. Continuous improvement has been achieved in these examinations. The averag...
In this research, the hydraulic performance of a C-type piano key weir as a side weir at a 45° section of a 180° curved channel has been investigated in a laboratory manner. The results of this research are determination of the flow shape and the trend of water level changes by showing the surface profiles. The higher discharge coefficient of the p...
To reduce the clogging problem in sediment removal from dam reservoirs using the hydro-suction method, the present study introduces and investigates the Inclined Multi-Hole Suction (IMHS) system. In some cases, the deposition of sediments in the horizontal part of the Multi-Hole Suction (MHS) pipes may clog these pipes. Using an inclined suction pi...
Using the outlier robust extreme learning machine (ORELM) method, the discharge coefficient of side weirs placed on rectangular and trapezoidal canals was simulated for the first time in this study. The parameters governing the discharge coefficient of side weirs including Froude number (Fr), the ratio of the weir length to the main channel length...
In the present study, a 3D physical model with a scale of 1:50 was developed based on the Germi-Chay dam. The model was used to assess the impact of downstream channel width variation on the efficiency of arched plan stepped spillways. Four ratios of downstream channel width to spillway crest width (Wch/W) were considered which range from 0.214 to...
Bedload transport due to approved complexity and challenges has been the subject of different modeling approaches. Due to imprecise of the empirical equations, the potencies of the intelligent techniques in developing more accurate bedload predictive models have been highlighted. In this paper, an optimum hybridized artificial neural network (ANN)...
Scour around bridge piers and abutments are among the most important causes of bridge destruction worldwide. The present laboratory study aims to evaluate the scour around bridge piers in presence of abutment and vegetation cover in floodplain. The experiments were performed in a rectangular channel with a composite section with the width and lengt...
Stepped spillways provide effective energy dissipation and increase spillway capacity without taking up additional land compared to other types of spillways. In present study, a 3D physical model with scale of 1:50 was developed based on Germi-Chay dam in Institute of Soil and Watershed Conservation of Iran. This model was used to assess the impact...
The present study aims to experimentally evaluate the hydraulic characteristics of a B-type triangular piano key weir (PKW). Equations are proposed for estimating the discharge coefficient (Cd) of type B triangular PKW. Nine PKW models were tested, and the discharge coefficients were obtained. To determine the PKW efficiency, in each flow condition...
Piano key weirs are a new type of weir designed to enhance the discharge capacity of dams. The present study is aimed at experimentally evaluating the hydraulic characteristics of a D-type triangular piano key weir. The purpose of these experiments was to study the flow regime, the stage-discharge relationship, and the effect of h/P ratio on the di...
In general, the side weirs are the structures installed along a channel or river. When the flow depth rises above the weir crest, the overflow passes through these weirs and enters the lateral canal. Nowadays, piano key weirs are considered as an important alternative to labyrinth weirs to modify the weirs encountering with difficulty to pass the m...
A new type of Long-crested weirs is Piano Key weir that allows the reservoir to run at a higher level. The use of a Piano Key weir as side weir allows for more drainage, due to the geometric shape of the channel and the impact of centrifugal force on the flow, in a channel having longitudinal curvature. This research, examine the Changing of flow p...
Parallel skimming walls are regarded as one of the more efficient methods for controlling inlet sediment to a lateral intake. The present study attempts to experimentally scrutinize the impact of the angles of parallel skimming walls (θ), the corresponding distance (b), and the discharge variations of the main channel of the inlet sediment for the...
The amount of transported sediment load by streams is a vital but high nonlinear dynamic process in water resources management. In the current paper, two optimum predictive models subjected to artificial neural network (ANN) were developed. The employed inputs were then prioritized using diverse sensitivity analysis (SA) methods to address new upda...
The parallel skimming walls are regarded as one of most applicable methods for gaining decline in the amount of sediment entering the lateral intake. The parallel skimming walls are installed on the main channel, in front of the intake span, creating a rotational flow and divert the sediments from intake span, as a result the reduction in the amoun...
Side weirs are hydraulic structures used for flow diversion in irrigation and drainage systems. Piano-key side weirs (PKSW) were investigated since 2017. For the specific width of a diversion channel, the discharge coefficient of PKSWs is far greater than that of classic rectangular side-weirs (CRSWs). In this study, the discharge coefficient of va...
Rivers are considered as beneficial sources to provide gravel and sand for projects but it creates many negative hydraulic, physical and environmental effects. As the amount of infilling and appropriate location for better pit filling play important roles in scheduling the mining program and returning of the river to its stable condition, in this r...
Side weirs deflect the approaching flow to the side channel with a specific angle. Considering this angled flow, the oblique shape of side weirs would improve the flow discharge efficiency. In this paper, a Piano Key Side Weir (PKSW) with oblique keys is proposed. Sixteen PKSWs with different key angles were studied in the laboratory, as well as tw...
Channel junctions and lateral intakes are always caused turbulence in the passing flow. In this research, an experimental study was carried out to explore a possible method for sediment control for a series of skimming walls and a single spur dike, simultaneously. In order to direct the flow into the diversion channel and increase the skimming wall...
Side weirs are hydraulic structures usually used for flow diversion in irrigation, drainage and sewer networks. The piano key weir (PKW) is the newest form of labyrinth weir. It is more efficient and needs less reinforcing steel. PKW can be used as a side weir. The aim of this research is to study the geometric and hydraulic parameters of type-A tr...
Side weir is placed at the channel bank as a head regulator or a diversion device. Flow over a side weir has been the subject of many research studies considering its three dimensional and complicated characteristics. However, the labyrinth side weirs warrant further research due to their higher efficiency compared to linear side weirs. In this pap...
A spillway is a hydraulic structure used to provide the controlled release of surplus waters and floods from a dam into a downstream area. A side weir is a multipurpose hydraulic structure which is constructed in water conveyance systems with a height lower than that of the canal wall. When the water surface level goes up, the side weir regulates t...
Converging ogee spillway is employed as an emergency spillway constructed to control natural disasters such as instant floods. This paper presents an experimental study and artificial intelligence-based modeling of the discharge coefficient (Cd) of the converging ogee spillway (with a curve axis). The ogee spillway structure was tested in both symm...
Ogee spillways with converging training walls are applied to lower the hazard of accidental flooding in locations with limited construction operations due to their unique structure. Hence, this type of structure is proposed as an emergency spillway. The present study aimed at experimental and machine learning-based modeling of the submerged dischar...
Piano-key weirs can be used instead of classic rectangular side-weirs (CRSWs) to increase the discharge capacity of side weirs. So far, no research has been done on trapezoidal piano-key side weirs (TPKSWs) in a curved channel. This study examines the effect of using one or two cycles in TPKSWs on discharge capacity, having the same total width and...
Side weir has many applications in water distribution and regulation in irrigation and flood control. For a constant opening length, weir crest can be design as labyrinth or piano key shape to increase the developed length and discharge coefficient. Another way to increase the side weir efficiency is oblique design, which make the weir crest aligne...
River bed sand and gravel are utilized more than mountain materials due to their
availability and closeness to the transit roads and sites of usage. Excessive and
non-technical extraction of gravel and sand bring a kind of interference in them, leading
to many negative consequences. Therefore, presenting solutions to reduce these impacts
and infill...
Side weirs are widely used to divert a part of the discharge in irrigation channels and sewer systems. To increase the discharge capacity of linear side weirs at constant length in a channel bank, the application of folded plan forms such as the labyrinth and piano key in a side configuration warrants further research. In this experimental study, n...
Burrowing-type suction pipe method is a siphon dredging technique which removes sediment. This innovative technique attracted the attention of many researchers, recently, because of main advantages such as preventing water loss and conserving downstream environmental sustainability of dams. This study investigates the influence of geometrical and m...
Many researchers by modifying different kinds of collar or combination of the collar and other local scour countermeasures try to weaken local scour mechanisms and reduce the scour depth or delay it. In present study a new kind of collar i.e. ridged collar, was employed as a local scour countermeasure to disrupt down-flow and horseshoe vortex agent...
Many researchers by modifying different kinds of collar or combination of the collar and other local scour countermeasures try to weaken local scour mechanisms and reduce the scour depth or delay it. In present study a new kind of collar i.e. ridged collar, was employed as a local scour countermeasure to disrupt down-flow and horseshoe vortex agent...
Downstream plunge pools of dams have been exposed to erosion caused by falling jets of the hydraulic structure’s outlets. This damages the foundation and body of the dam and its constituent structures. Therefore, investigating the scouring phenomenon of plunge pools is one of the important issues in hydraulic engineering. The present research inves...
One obstacle of in imbibition of dam's reservoir in time of Floodwater is the Existence of Suspended sediment in floodwater. On the other hand because the lack of water resources in arid regions, providing of water is dependent on imbibition of dams. Thus existence of Suspended sediment in reservoir's water can malfunction in the imbibition program...
A piano key side weir (PKSW) is a non-linear weir that discharge exceeds linear weirs by increasing the length in width. PKSW can be used in side weirs with space limitation. As side weirs are extensively used in flood control, water level control in rivers, and water supply channels, it is necessary to use PKSW as side weirs. This research discuss...
Rivers are one of the most important borrow aggregates and sand and gravel mining in rivers due to the morphologic, hydraulic and sediment transport characteristics and methods of extraction create many negative effects in them. In this research, the influence of distance and shape of consequent bed material mining pits is investigated in order to...
Piano key weir has a higher effective length in comparison with other weir types. Piano key weir Lateral weirs can be employed in irrigation and drainage networks, flood control systems and water & waste-water systems instead of common side weirs. Keeping in view that discharge coefficient evaluation of the weirs is mandatory in channels having lon...
Sharp-crested weirs are widely used for the purposes of flow measurement, flow diversion and water level control in hydraulics, irrigation, and environmental projects.
Discharge coefficient at these weirs is a function of head to weir height ratio (H/P). In a constant head, flow increases by increasing the length of weir in the plan. One of these w...
Most of weirs create a region with relatively static water in upstream, which can be the place of sediments and wastes deposition in water. Sediments accumulation in upstream changes flow conditions. In this case, combined weir and gate can be propounded as a useful solution. In the present paper, Flow3D was used to numerically simulate temporal ch...
Contrary to the single pier, due to the complexity of scour mechanism around pile groups, empirical methods do not give a satisfactory prediction for the scour depth around pier with multiple piles. It was shown recently that artificial neural networks have better prediction performance than empirical methods. In order to exploit the full potential...
Stepped spillway is an effective approach to remove the potential occurrences of cavitation in chute of spillways and also to significantly reduce the size of energy dissipators at the toe of dam. In this study, to predict the energy dissipation ratio of flow over stepped spillways, artificial neural network, support vector machine, genetic program...
Background and objectives: Sharp crested weirs are used for the purpose of flow measurement, flow
diversion and water level control in hydraulics, irrigation and environmental projects. So exploring the
features and characteristics of the hydraulic properties are an important issue in the design of these
structures. Various studies have been done a...
Sediment entering lateral intakes depends on flow pattern in intake entrance. Using a structure in front of intake entrance can changes this pattern and as a result the entering sediment. One of the effective methods to change pattern and manage sediment entering lateral intake is using skimming wall. By removing the sediments, in deed will not exi...
Background and objectives: Local Scour phenomenon in downstream of hydraulic structures such as spillway, gate, stilling basin is one of the most important issue. Scour around the structures in addition to an important impact on the stability of the structure, may change the flow characteristics and the result of changes in the structural design pa...
Dam spillways are the structures that lead rightly and safely the outflow downstream, so that the dam integrity can be guaranteed. Many accidents with dams have been caused by an inadequate spillway design or insufficient capacity. To accurately respond the hydraulic spillways, designers use physical modeling for designing this kind of structures....
Settlement of sediments behind weirs and accumulation of materials floating on water behind gates decreases the performance of these structures. Weir-gate is a combination of weir and gate structures which solves them Infirmities. Proposing a circular shape for crest of weirs to improve their performance, investigators have proposed cylindrical sha...
Due to spur-dike construction along the river direction and reducing flow width, a shear distribution change may occur from upstream to downstream side of structure. So, this may lead to formation of wake vortices around spur-dike which results in extension of scour hole and may increase the risk of structure failure as well. In the present study,...
In this paper, considering the accumulation of the sediments on the floor of the vortex settling basin during sediment extracting, curvature submerge vanes were used on the floor of the vortex basin and the effect of the size of the orifice was studied on the performance of the curvature submerge vanes for sediment leaching of the floor of the basi...
Abstract: The present research investigate experimental the head loss of flow energy throw the semi cylindrical wire-gates. The effective parameters on the studied system in forms of dimensionless parameters obtained by using Buckingham’s theory. The experiments were conducted in a rectangular flume with the length of 8m, width of 0.282m and height...
This experimental study investigates the relationship between discharge coefficient of combined interpass and overpass flow in the rockfill dams including the geometric and hydraulic specifications of flow using a dimensional analysis. An equation is suggested for estimating the discharge coefficient of combined interpass and overpass flow in the r...
Construction of spur dike structures or bridge abutments in river streams may decrease the channel width and lead to a shear distribution change from upstream to downstream and result in bed erosion. The stability of Spur dike structures in rivers may be decreased due to a significant amount of local scour around them. High intensity turbulence flo...
The spur-dike structures may be constructed along river streams to protect river banks from erosion or other purposes. Stability of these spur-dikes may be decreased due to formation of scour hole around their foundations. Due to spur-dike construction along the river direction and reducing the flow width, a shear distribution change may occur from...
The combined weir-gate are one of the structures which can be substituted in channels instead of weirs and gates. Curvature of the semi cylindrical weir- gate structures lead to hold the water snap to the structures body and in comparison with sharp crested weir- gate structures were caused by increasing the amount of coefficient discharge. So in c...
Abstract: The present research investigate the head loss of flow energy throw the semi cylindrical wire-gates. The effective parameters on the studied system in forms of dimensionless parameters obtained by using Buckingham’s theory. The experiments were conducted in a rectangular flume with the length of 8m, width of 0.282m and height of 0.3m in S...
In this research the hydraulics property of flow on and under the semi-cylindrical gate with 180 degree of rotation around the main axis of gate has been studied in a way that the structure can act as both wire and gate-wire. The Experiments has been done in a horizontal channel with a length of 8 m and width of 0.282m through using PVC pipes with...
در این پژوهش به بررسی خصوصیات جریان عبوری از دریچه نیم¬استوانه¬ای وقتی که سازه حول مرکز نیم استوانه می¬چرخد پرداخته شده است. آزمایشات در کانالی افقی به طول 8 متر و عرض 282/0 متر انجام شد. در این آزمایش از لوله¬های PVC با قطرهای 70، 120و 160 میلی متر به عنوان دریچه استفاده گردید. نتایج آزمایشات نشان داد که براي تمام زوایا با افزایش پارامتر بی¬بعد H/...
این پژوهش به بررسی و مقایسه¬ی آزمایشگاهی رابطه دبی اشل و ضریب دبی در چرخش 360 درجه¬ای سازه نیم¬استوانه¬ای و تأثیر آن بر هیدرولیک جریان می¬پردازد، آزمایش¬ها در کانالی افقی به طول 8 متر و عرض 282/0 متر با استفاده از لوله¬های PVC با قطرهای 70، 120 و 160 میلی¬متر به عنوان سرریز و سرریز- دریچه انجام شد. نتایج پژوهش نشان می¬دهد در تمام زوایای قرارگیری سا...
در این پژوهش به بررسی چرخش دریچه نیم¬استوانه¬اي بر افت انرژی از زوایاي 0 تا 90 درجه نسبت به افق در دو حالت انحنای نیم-استوانه به سمت بالادست و پایین¬دست پرداخته شده است. آزمایش¬ها در کانالی افقی به طول 8 متر و عرض 282/0 متر انجام شد. در این آزمایش از لوله¬های PVC با قطرهای 70، 120و 160 میلی¬متر به عنوان دریچه استفاده گردید. نتایج آزمایش¬ها نشان داد...
Scour around hydraulic structures is an phenomenon. Recognition of this phenomenon and dealing with it is an issue considering which will ensure the project success. Local scour at piers has been reported as the most important factor in the destruction of the bridges. The use of submerged and non-submerged piles is one of the scour control methods....
One of the most important cause of bridges failure in river streams is local scour around their abutments. Due to abutment construction along the river direction and reducing the flow width, a hydrostatic pressure change may be occurred from upstream to downstream side of abutment. So, this may lead to formation of wake vortices and turbulence flow...
Application of the vortex settling basins is one of the methods for controlling suspended sediments in the water structures. In this paper, considering the accumulation of the sediments at the floor of the vortex settling basin during sediment extracting, curvature submerged vanes in 90o radial section were used at the floor of the vortex basin and...
In this century due to population growth, the use of river water has become more complicated. Since most rivers pass across loose and erodible areas, they always act as the most important factor of transferring eroded materials from the solid crust of the earth. Vortex basins are among the solutions known for the high-speed separation of solids fro...
High gradient streams are characterised by steep slopes, coarse bed material with non-uniform size distribution, flash floods and flow depths of magnitude comparable to the bed material size. Another characteristic of high gradient streams is development of armor layers with cobbles and boulders. In these streams, it is often difficult to measure w...
One of the sediment controlling methods in the hydraulics structures is application of the vortex settling basin. Such basins represent the higher speed in sediment separation
in comparison with other usual settling structures. One of the problems of such settling
structure is the settlement of a portion of the sediments on the basin floor as a res...
Many bridges in the world every year for Failure to consider in the design of hydraulic elements are destroyed. During the spring floods of 1987, 17 bridges in New York and New England were damaged or destroyed by scour. In 1985, 73 bridges were destroyed by floods in Pennsylvania, Virginia, and West Virginia. In the present study investigate effec...
Spillway is a structure that conveys the stream correctly and securely downside to ensure the stability and the permittivity of the dam during the flood. If topographic conditions are limited, the ogee spillway with curvature in the plan may be used. In this study, an experimental model of the Garmi-Chay Miane dam spillway was made in scale 1:50. T...
The spillways are used in civil engineering works. In some cases to ensure that the water passes over the spillway on a smooth surface, the approach channel is used. In this study, an experimental model of the ogee spillway to arched plan and convergent sidewalls is examined. And to evaluate the effect of the approach channels, some channels with w...
One of the ways to control the sediments in hydraulic structures is to use vortex settling basin. Vortex
basins are among the solutions known for the high-speed separation of solids from liquids (filtration).
One of the problems of such basins is the settling of sediments in their floor which necessitates the
performance of required investigations...
River banks are exposed to bank erosion and destruction. The undesirable effect of erosion is included muddy water and erosion increasing, river bank destruction and problem of sediment accumulation in shallow. A River utility for human requirements and decreasing the river's dangers are one of the river engineering goals. Expansion and risk of thi...
Intake of river is done for different purposes such as irrigation, urban water supply, industry, electricity, etc. Side
intakes are used for ongoing river to the flat lands. One of the issues that faced by designers of water structures is the
design of sediment control facilities in the place of drainage and irrigation networks inlet. In this resea...
Due to abutment construction along the flow line, the hydrostatic pressure from upstream to downstream change which
cause turbulent flow and eddy flow around the abutment. The main mechanism of local scour is the eddy flow which not
only causing scour in the front noise of abutment in long term but also make the possibility of construction failure...
Scour is the main damage cause of abutments, piers, spur dykes and the hydraulic structures built in the river bed. By examining flow around the vertical wall abutment, it was observed that before the formation of scour hole, the streamlines at upstream of the abutment were deflected towards the noise abutment and the down flow in upstream face of...
Bridge in flood plains can be damaged by the flood. The main problem of the structural can be the damage accountability to local scour. Phenomenon of local scour at the nose due to constriction of the flow and vortex would be caused strong. Use of numerical methods is difficult due to the complexity of the phenomenon and the influence of parameters...
The maximum depth of scouring around spur dikes plays an important role in the hydraulic design
process. There have been many studies on the maximum depth of scouring, but there is little
information available on the time variation of scour depth. In this paper, the time variation of
scouring around the first spur dike in a series was investigated...
Scouring around the bridge piers causes a great deal of damage every year around the globe. Local scour is caused due to the large-scale eddy structures or a system of vortices, which are developed near the obstructions. To control this, a number of different methods have been proposed. One of the engineering methods of encountering to local scouri...
One of the important issues in hydraulic engineering is inspection of local scour depth around
bridge pier. Using piles is one of the ways for confronting local scour and erosion. In this study,
the experiments were conducted in an 8m long, 0.5m deep and 0.25m wide flume. And the effect
of using piles and number of them observed on the amount of sc...