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    Application of artificial neural networks and mathematical modeling for the prediction of water quality variables (Case study: Southwest of Iran)

    , Article Desalination and Water Treatment ; Volume 57, Issue 56 , 2016 , Pages 27073-27084 ; 19443994 (ISSN) Salami, E. S ; Salari, M ; Ehteshami, M ; Bidokhti, N. T ; Ghadimi, H ; Sharif University of Technology
    Taylor and Francis Inc 
    Abstract
    River water quality monitoring using traditional water sampling and laboratory analyses is expensive and time-consuming. The application of artificial neural network (ANN) models to simulate water quality parameters is cost-effective, quick, and reliable. This study provides two methods of mathematical and ANN modeling to simulate and forecast five important river water quality indicators (DO, TDS, SAR, BOD5, HCO3) correlated with variables such as EC, temperature, and pH which can be measured easily and almost with no cost. The mathematical method is based on polynomial fitting with least square method and the neural network model was developed using a feed-forward algorithm. The 35 years’... 

    Modelling and Prediction of Water Quality of Dam Reservoir Using CE-QUAL-W2 Model and Machine Learning Methods (Case Study: Shahr Bijar Dam)

    , M.Sc. Thesis Sharif University of Technology Ebrahimi, Abolfazl (Author) ; Shamsai, Abolfazl (Supervisor) ; Ghaemian, Mohsen (Supervisor)
    Abstract
    Dams are constructed for various purposes, including flood control, drinking water supply, agriculture irrigation, electricity generation, etc. The dam converts the river's natural and dynamic flow into a stagnant artificial lake where humans control the outflow of water, reducing the velocity of water movement and increasing residence time, followed by the entry and accumulation of nutrients in the reservoir, resulting in phenomena such as thermal stratification and eutrophication. Due to the changing climatic conditions of Iran and sudden droughts and wet periods, the need to monitor the water level of dam reservoirs and their water quality to keep them in the best operational condition... 

    Modeling of Biological Matter Cycling in Shallow Lake by System Dynamic Method

    , M.Sc. Thesis Sharif University of Technology Katirachi, Amir Nasser (Author) ; Abrishamchi, Ahmad (Supervisor)
    Abstract
    Modeling of water quality in shallow lake is the goal of this roject.Matters cycling in environment will be explained. The dissolved Oxygen will be assigned the most important factor in water quality. The phytoplankton Growth rate and fatality rate will be modeled By LOTKAVOLTERRA equations. The nitrification by nitrifying bacteria and Michael Menton equations will be explained. Modeling will be executed By System Dynamic which feedbacks are the most com ponents of it.The model will be built with equations and coefficients in literatures and this model run by VENSIM®software. We will assure by some extreme condition tests about the structure of the model and finally we will make a... 

    Surveying the jagorood river's self-purification

    , Article 6th International Conference on Environmental Informatics, ISEIS 2007 ; 21-23 November , 2014 Nazari-Alavi, A ; Mirzai, M ; Sajadi, S. A. A ; Alamolhoda, A. A ; Sharif University of Technology
    Abstract
    the development and enlargement of city structure has caused the environmental problems on watershed of Latian dam which is one of the drinking water resourses of Tehran. The enlargement of Lavasan town and existence of an army garrison that it's effluents of treatment plant discharge to this river necessitate a water quality surveillance in entrance area of the dam. The present research includes the survey of this river's self-purification in the mentioned-above area. Numerical analysis is used in different methods to explain self- purification. Frist, we have the numerical analysis and analytical methods for a known sample in order to determine the accuracy and deviation between two... 

    Development of a paper-based plasmonic test strip for visual detection of methiocarb insecticide

    , Article IEEE Sensors Journal ; Volume 17, Issue 18 , 2017 , Pages 6044-6049 ; 1530437X (ISSN) Mohammadi, A ; Ghasemi, F ; Hormozi Nezhad, M. R ; Sharif University of Technology
    Abstract
    This paper describes a simple and low-cost test strip for on-site monitoring of methiocarb insecticide. Hydrophilic filter paper soaked in agarose solution was bounded by hydrophobic solid wax and then was coated with unmodified gold nanoparticles (AuNPs). AuNPs aggregation caused by methiocarb served as colorimetric response. We demonstrated detection capability of methiocarb both in solution- and substrate-based sensor. A good linear relationship was obtained between the colorimetric response and the concentration of methiocarb ranging from 20 to 80 ng mL -1 with a limit of detection of 5 ng mL -1. Excellent selectivity toward methiocarb was observed among various pesticides and cationic... 

    Quality evaluation of Jajrood river (IRAN) by quality indices methods

    , Article 2012 International Conference on Advances in Materials Science and Engineering, AMSE 2012, Seoul, 9 December 2012 through 10 December 2012 ; Volume 650 , 2013 , Pages 652-657 ; 10226680 (ISSN); 9783037855997 (ISBN) Mirzaei, M ; Hasanian, H ; Sharif University of Technology
    2013
    Abstract
    This Regular evaluation and analysis of river quality helps accurate management to reach acceptable quality. In this study, water quality indices (WQI) method applied to evaluate quality of Jajrood River which is one of the main sources of Tehran drinking water. It helps to subsidize management actions in Jajrood watershed. Sampling carried out for 9 years during 2001-2010 in 10 stations along the river in wet and dry stations to identify water quality and the main source of pollution. Results show water quality in all stations classifies as medium according to National Sanitation Foundation (NSF) and water quality index in wet season is better than the corresponding value in dry seasons.... 

    A conflict resolution method for waste load reallocation in river systems

    , Article International Journal of Environmental Science and Technology ; 2018 ; 17351472 (ISSN) Aghasian, K ; Moridi, A ; Mirbagheri, A ; Abbaspour, M ; Sharif University of Technology
    Center for Environmental and Energy Research and Studies  2018
    Abstract
    Various urban, industrial, and agricultural pollutions discharge more than river self-purification potential damages river ecosystem and increases water treatment costs. As different decision-makers and stakeholders are involved in the water quality management in river systems, a new bankruptcy form of the game theory is used to resolve the existing conflict of interests related to waste load allocation in downstream river. The river restoration potential can allocate to the conflicting parties with respect to their claims, by using bankruptcy solution methods. In this research, dischargeable pollution loads to Karun River are determined by pollution sources in various scenarios using... 

    Selective withdrawal optimization in a multipurpose water use reservoir

    , Article International Journal of Environmental Science and Technology ; Volume 16, Issue 10 , 2019 , Pages 5559-5568 ; 17351472 (ISSN) Aghasian, K ; Moridi, A ; Mirbagheri, A ; Abbaspour, M ; Sharif University of Technology
    Center for Environmental and Energy Research and Studies  2019
    Abstract
    Dam construction in arid and semiarid regions is generally related to the risk of increased salinity, due to water passage in contact with salty formations. Hence, it is important to take reservoir thermal and salinity stratification into account in operational rules. In the present study, a simulation–optimization model was developed to determine the amount of water release from various outlets to discharge the brine from hypolimnion layer considering the downstream water quality limitations. The most appropriate time, rate, and concentration to release brine were determined based on water consumption conditions and downstream water demand and river ecology characteristics. The proposed... 

    A novel analysis of critical water pollution in the transboundary Aras River using the Sentinel-2 satellite images and ANNs

    , Article International Journal of Environmental Science and Technology ; Volume 19, Issue 9 , 2022 , Pages 9011-9026 ; 17351472 (ISSN) Fouladi Osgouei, H ; Zarghami, M ; Mosaferi, M ; Karimzadeh, S ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2022
    Abstract
    Recently, remote sensing considered as important tool in studies of water quality issues. The Aras River flows across a transboundary basin in northern Iran. In this study, the aim is to model the water quality parameters (WQPs) using remote sensing and an artificial neural network (ANN), which is a new method proposed to find WQPs based on multivariate regression approaches. The relationship between WQPs and digital data from the Sentinel-2 satellite was determined to estimate and map the WQPs in this river. Using the field data and digital image data, the obtained results show that multivariate regression approaches and high-resolution remote sensing could monitor and predict the... 

    A conflict resolution method for waste load reallocation in river systems

    , Article International Journal of Environmental Science and Technology ; Volume 16, Issue 1 , 2019 , Pages 79-88 ; 17351472 (ISSN) Aghasian, K ; Moridi, A ; Mirbagheri, A ; Abbaspour, M ; Sharif University of Technology
    Center for Environmental and Energy Research and Studies  2019
    Abstract
    Various urban, industrial, and agricultural pollutions discharge more than river self-purification potential damages river ecosystem and increases water treatment costs. As different decision-makers and stakeholders are involved in the water quality management in river systems, a new bankruptcy form of the game theory is used to resolve the existing conflict of interests related to waste load allocation in downstream river. The river restoration potential can allocate to the conflicting parties with respect to their claims, by using bankruptcy solution methods. In this research, dischargeable pollution loads to Karun River are determined by pollution sources in various scenarios using... 

    Evaluation of Water Quality of Anzali Lagoon by Developing a Numerical Model

    , M.Sc. Thesis Sharif University of Technology Saghafian, Mariam (Author) ; Safaie, Ammar (Supervisor)
    Abstract
    Wetlands are valuable ecosystems that have a wide variety of functions to protect biodiversity, natural, economic and social values. Hydrological changes and nutrient enrichment, resulting from population growth, economic development and climate change are threatening the wetlands. Recently, assessing spatial and temporal variations of water quality has become an important aspect of the physical and chemical characterization of aquatic environments. Anzali wetland is one of the international wetlands in Iran, located in the southern part of the Caspian Sea in Gilan province. This wetland has been exposed to many pollution sources including agricultural, industrial, and municipal wastewater... 

    Fertilizer, landscape features and climate regulate phosphorus retention and river export in diverse Midwestern watersheds

    , Article Biogeochemistry ; Volume 146, Issue 3 , 2019 , Pages 293-309 ; 01682563 (ISSN) Boardman, E ; Danesh Yazdi, M ; Foufoula Georgiou, E ; Dolph, C. L ; Finlay, J. C ; Sharif University of Technology
    Springer  2019
    Abstract
    Non-point source pollution of phosphorus (P) is a primary cause of eutrophication of aquatic ecosystems, and poses a persistent management challenge due to the dynamic and poorly understood processes controlling the transport and transformation of P at the watershed scale. We examined phosphorus inputs, retention, and riverine losses in 62 diverse watersheds that included a wide range of land cover and use (minimally disturbed to human dominated) and human P inputs in Minnesota, USA. Fertilizer inputs from row crop cultivation were the dominant source of P to agricultural watersheds. A large majority of P inputs was retained in watershed soils or removed in agricultural products. However,... 

    The millennium-old hydrogeology textbook the Extraction of Hidden Waters by the Persian mathematician and engineer Abubakr Mohammad Karaji (953 CE-1029 CE)

    , Article Hydrology and Earth System Sciences ; Volume 24, Issue 2 , 2020 , Pages 761-769 Ataie Ashtiani, B ; Simmons, C. T ; Sharif University of Technology
    Copernicus GmbH  2020
    Abstract
    We revisit and shed light on the millennium-old hydrogeology textbook The Extraction of Hidden Waters by the Persian mathematician and engineer Karaji. Despite the nature of the understanding and conceptualization of the world by the people of that time, ground-breaking ideas and descriptions of hydrological and hydrogeological perceptions such as components of hydrological cycle, groundwater quality and even driving factors for groundwater flow were presented in the book. Although some of these ideas may have been presented elsewhere, to the best of our knowledge, this is the first time that a whole book was focused on different aspects of hydrology and hydrogeology. More importantly, we... 

    Determination of environmental water requirements of Lake Urmia, Iran: An ecological approach

    , Article International Journal of Environmental Studies ; Volume 64, Issue 2 , 2007 , Pages 161-169 ; 00207233 (ISSN) Abbaspour, M ; Nazaridoust, A ; Sharif University of Technology
    2007
    Abstract
    Lake Urmia is a thalassohaline ecosystem. It is an extremely simple ecological pyramid. This makes it a very sensitive ecosystem. This ecosystem has been facing various threats regarding the amount of water released from the associated basin. To calculate the lake water requirement with an ecological approach, we identified three variables: ecology, water quality, and water quantity indices as environmental indicators. The ecological index represented by Artemia urmiana is considered as an independent variable; while, the water quality index represented by concentration of NaCl, and the water quantity index represented by water elevation are regarded as dependent variables. The salinity... 

    Investigation of short-time artificial aeration on water quality parameters and phytoplankton structure: a case study “Mamloo Reservoir”

    , Article Desalination and Water Treatment ; Volume 254 , 2022 , Pages 217-228 ; 19443994 (ISSN) Naderi, H ; Javid, A. H ; Borghei, S. M ; Eslamizadeh, M ; Sharif University of Technology
    Desalination Publications  2022
    Abstract
    Thermal stratification accompanied by a release of nutrients from sediment is a serious problem for the management of water quality. Water aeration and mixing technology can be widely used to control endogenous pollution and algae growth in reservoirs and lakes by water quality managers. In this research, a diffuser aeration system, was installed in a water column, in the Mamloo stratified Reservoir; and the impact of artificial aeration was brought under extensive assessment in relevance with the qualitative and biological parameters of the water, during the preliminary 6 d of aeration. The results showed that the thermal stratification was remarkably disturbed. After aeration, the amount... 

    Forecasting models for flow and total dissolved solids in Karoun river-Iran

    , Article Journal of Hydrology ; Volume 535 , 2016 , Pages 148-159 ; 00221694 (ISSN) Salmani, M. H ; Salmani Jajaei, E ; Sharif University of Technology
    Abstract
    Water quality is one of the most important factors contributing to a healthy life. From the water quality management point of view, TDS (total dissolved solids) is the most important factor and many water developing plans have been implemented in recognition of this factor. However, these plans have not been perfect and very successful in overcoming the poor water quality problem, so there are a good volume of related studies in the literature. We study TDS and the water flow of the Karoun river in southwest Iran. We collected the necessary time series data from the Harmaleh station located in the river. We present two Univariate Seasonal Autoregressive Integrated Movement Average (ARIMA)... 

    A new hybrid inverse modeling method for water quality monitoring using remotely sensed data

    , Article SPE Saudi Arabia Section Technical Symposium 2007, 7 May 2007 through 8 May 2007 ; 2007 ; 9781555639600 (ISBN) Shahraiyni, H. T ; Schaale, M ; Shouraki, S. B ; Fell, F ; Fischer, J ; Taheri, M ; Preusker, R ; Tajrishy, M ; Vatandoust, M ; Shahraeini, M. T ; Sani, P.N ; Taherishahraini, Z ; Khodaparast, H ; Sharif University of Technology
    Society of Petroleum Engineers  2007
    Abstract
    All of the man-made objects and anthropogenic activities related to the oil industries in water bodies (e.g. drilling, equipment installation, construction of oil platfonns and especially oil spillages) have enviromnental impacts on water ecosystems. The assessment of oil field operations and oil platfonns impacts on water quality have become a necessity throughout the world. Phytoplanktons have the lowest trophic level in water enviromnent; therefore the life of all of the other marine animals is highly relevant to phytoplanktonic population. Hence it seems necessary to monitor the spatiotemporal effects of different activities and events, related to oil industries on phytoplanktons.... 

    Multiple interactive pollutants in water quality trading

    , Article Environmental Management ; Volume 42, Issue 4 , 2008 , Pages 620-646 ; 0364152X (ISSN) Sarang, A ; Lence, B. J ; Shamsai, A ; Sharif University of Technology
    2008
    Abstract
    Efficient environmental management calls for the consideration of multiple pollutants, for which two main types of transferable discharge permit (TDP) program have been described: separate permits that manage each pollutant individually in separate markets, with each permit based on the quantity of the pollutant or its environmental effects, and weighted-sum permits that aggregate several pollutants as a single commodity to be traded in a single market. In this paper, we perform a mathematical analysis of TDP programs for multiple pollutants that jointly affect the environment (i.e., interactive pollutants) and demonstrate the practicality of this approach for cost-efficient maintenance of... 

    Design, Fabrication and Testing of an Integrated Microfluidic Platform for Water Quality Testing

    , M.Sc. Thesis Sharif University of Technology Mortazavi, Mohammad Ali (Author) ; Saeedi, Mohammad Saeed (Supervisor)
    Abstract
    Nowadays environmental issues are of great importance and one of the most paramount issues is the quality of water, because clean water is vital to our existence. Besides different methods for water purification, water quality testing is a useful and needful tool. Traditional methods for determination of water quality parameters are mainly expensive, time consuming and require highly trained staff. In this study, we have described a centrifugal microfluidic platform (Lab- on – a- CD) for simultaneous determination of different physical and chemical parameters including Nitrite, Free Chlorine and pH. All of the processes from sample injection to detection are integrated on this low-cost and... 

    Water Quality Monitoring Using Remote Sensing: A Case Study of Gorgan Bay

    , M.Sc. Thesis Sharif University of Technology Mofidi Neyestani, Reza (Author) ; Tajrishi, Massoud (Supervisor)
    Abstract
    Surface water quality management needs water contaminants monitoring and information about water quality parameters. Field measurement is a costly, time-consuming procedure that limits information about the whole surface of a water body. Remote sensing methods are valuable ways that prepare water quality information using different characteristics between reflectance detected from each parameter. This study aimed to investigate the water quality parameters of Gorgan Bay using field sampling and a feasibility study using Landsat-8 and Sentinel-2 images to estimate the spatial and temporal changes of optically active parameters (such as sea surface temperature (SST), salinity, electrical...