Iranian Journal of Science and Technology Transactions of Civil Engineering

ارسال های اخیر

  • Use of Different Irrigation Water Deficit Schemes for Economic Operation of a Reservoir 

    پدیدآور نامشخص (Shiraz University, 1999-10-01)
    Some common method, such as 75% of full demand (75%), shortage index (SI), modified shortage index (MSI) and planned deficit at specific dry years (PD) were compared with proposed method of constant water deficit (CWD) for ...

  • A Degradation Model for the Triaxial Cyclic Loading Behavior of Shiraz Silty Clay 

    پدیدآور نامشخص (Shiraz University, 1999-10-01)
    In this paper the principles of the Ramberg-Osgood expression an the Masing criterion for cycling loading are described. Modification to the Ramberg-Osgood expression are reviewed and suggested methods for parameter ...

  • Uncertainty in the design and simulation of reservoirs 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    Insufficient information associated with historical data may require utilization of time series techniques, which in turn would result in record generation with sources of uncertainty. This type of effect can be evaluated ...

  • Autographic rain-gage network design for iran by kriging 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    Autographic rain-gage networks are designed to provide the density and distribution of stations so that characteristics of the rainfall events both in time and over the region concerned can be determined with sufficient ...

  • Use of a self-cementing fly ash as a soil stabilization agent 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    The increasing trend towards electrical power generation through coal combustion has aggravated the problems associated with disposal of the fly ash produced as a by-product. Due to the pozzolanic properties of fly ash, ...

  • Relating the usda and isss soil particle size distributions 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    Different systems are in use for texture classification of soils. The two most common systems originated with the International Soil Science Society (ISSS) and the United States Department of Agriculture (USDA). These ...

  • Prediction of sediment transport in littoral zones 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    In this paper, the longshore sediment transport in littoral zones is investigated. For investigation of sediment transport in the nearshore zone, the effects of waves, currents and topographical conditions of the coast, ...

  • Finite element modeling of flows in open-channel transitions 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    To analyze flows in channel expansions and contractions, two-dimensional, depth-averaged, unsteady flow equations are solved by using the two-step Taylor-Galerkin scheme. The 2-D, depth-averaged equations are written in a ...

  • Vertical and horizontal seismic microzonation by microtremor asurement 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    One of the methods by which one can state the dynamic characteristics of the soil of an area, is by the measurement and analysis of microtremors. In this paper microtremors have been measured on 143 sites located in the ...

  • Buckling modes of plate assemblies with variable thickness 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    A semi analytical procedure based on the bubble finite strip method for the elastic buckling problems of thin-walled structures with variable cross section thickness is presented. The method is programmed to investigate ...

  • Winter rainfall in iran: enso and aloft wind interactions 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    The effect of the El Oscillation (ENSO) phenomenon on winter rainfall in Iran was explored for the period 1951-1995. The interactions between this phenomenon, aloft wind in Tehran and the rainfall were also investigated. ...

  • The joint probability method of determining the flood return period of a tidally affected pond 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    In this paper a method is presented to determine the return period of flood levels within detention ponds used to store surface water runoff for affected coastal catchments. A simulation method is proposed in probability ...

  • An investigation into the risk of piping at dams in the Urmia region, Iran 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    Six diversion dams in Shar-Chai, Nazlu-Chai, and Baranduz-Chai rivers in Urmia plain, Urmia, Iran, were selected to investigate their safety against piping. The analytical model was based on a PIPING code based on Sellmeijer's ...

  • Strength and deformation properties of a schist rock in Isfahan 

    پدیدآور نامشخص (Shiraz University, 2004-03-01)
    In most parts of the city of Isfahan, at depths of 5 to 20 meters from the ground surface, schist is the predominant rock. This schist is a layered rock with variable thickness of 3 cm or more. Triaxial tests were conducted ...

  • An empirical model for prediction of conveyance efficiency for small earth canals 

    پدیدآور نامشخص (Shiraz University, 2004-03-01)
    Most of the water loss in distribution and conveyance earth canals occurs through seepage. This loss should be considered in irrigation network design through conveyance efficiency (ec). It is a common practice for the ...

  • An improved numerical algorithm to simulate the interaction of nonlinear water waves with a fixed large cylinder 

    پدیدآور نامشخص (Shiraz University, 2001-01-01)
    The diffraction of nonlinear water waves around a fixed large surface-piercing body of arbitrary shape is solved in three-dimension numerically using second order perturbation theory. A time domain panel method is applied ...

  • Improvement of microphysical and dynamical parameterization of Ogura and Takahashi’s numerical thunderstorm model 

    پدیدآور نامشخص (Shiraz University, 2004-03-01)
    Cloud models can play a key role in interpreting observational evidence to estimate the potential for successful cloud seeding experiments. Among different types of cloud models, one-dimensional cloud models with bulk water ...

  • Advective-diffusive and hydraulic trap modeling in two and three layer soil systems 

    پدیدآور نامشخص (Shiraz University, 2004-03-01)
    Downward and upward (hydraulic trap) advective-diffusive transport of chloride was modeled in two and three layer soil laboratory systems with Darcy velocities ranging from 3×10-9 m/s to 5.7×10-8 m/s. Two layer soil models ...

  • Second-order closure study of river-harbour flow 

    پدیدآور نامشخص (Shiraz University, 2004-03-01)
    A complete second-order closure model of turbulence has been used to predict the behaviour of fully developed turbulent flow in a square river harbour. For the two dimensional, this closure model entails the solution of ...

  • A re-visit to partial duration series of short duration rainfalls 

    پدیدآور نامشخص (Shiraz University, 2004-03-01)
    Uniqueness of the relationship between the return periods of the annual maximum series (AMS) and the partial duration series (PDS) are evaluated in light of the actual data. Rainfall intensities with durations of 15, 30, ...

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