water quality parameter Articles

  • Water Quality Parameters Along Rivers

    Water samples have been collected from a part of Surma River along different points and analyzed for various water quality parameters during dry and monsoon periods. Effects of industrial wastes, municipal sewage, and agricultural runoff on river water quality have been investigated. The study was conducted within the Chattak to Sunamganj portion of Surma River, which is significant due to the ...

  • Water Quality Monitoring for the “Big Four Parameters”

    Many different parameters can be measured in natural and artificial waters with sensors or via lab analysis. Each parameter effects water quality and the organisms that depend on the water for survival. Different states, monitoring agencies, and companies also place an emphasis on different water quality parameters to be monitored, depending on local conditions and mandates. For most water ...

  • Physicochemical parameters of natural waters

    All freshwater bodies are interconnected to the oceans, the atmosphere, and aquifers via a complex hydrological cycle. Wetlands, icecaps and biopheric water also participate in the continuous conveyance of water on planet Earth. The Earth’s hydrological cycle is driven by evaporation and gravity on which ecosystems and human societies depend. Growing populations may put stresses on natural waters ...

  • Parameter identification of river water quality models using a genetic algorithm

    For solving the multi-parameter identification problem of a river water quality model, analytical methods for solving a river water quality model and traditional optimization algorithms are very difficult to implement. A new parameter identification model based on a genetic algorithm (GA) coupled with finite difference method (FDM) was constructed for the determination of hydraulic and water ...


    By IWA Publishing

  • Development of a framework of automated water quality parameter optimization and its application

    Abstract  This paper presents a methodology and framework for the development of an automated least-squares optimization tool for calibrating water quality parameters in QUAL2E. The method has been applied to estimate the optimal water quality parameters in simulation of stream water quality for the Anyang stream in Korea. The Monte Carlo analysis ...


  • Assessment of data and parameter uncertainties in integrated water-quality model

    In integrated urban drainage water quality models, due to the fact that integrated approaches are basically a cascade of sub-models (simulating sewer system, wastewater treatment plant and receiving water body), uncertainty produced in one sub-model propagates to the following ones depending on the model structure, the estimation of parameters and the availability and uncertainty of measurements ...


    By IWA Publishing

  • The benefits of monitoring compressed air

    Compressed air is used in many manufacturing processes for many different reasons, from the actuation and control of pneumatic valves and cylinders to the operation of process machinery and tooling. It can also be used as a transport medium for bulk materials or as a purge gas. For all its uses it is nonetheless expensive. This is why, through detailed monitoring, a business can enjoy the ...


    By Contrec Europe Limited

  • Parameter estimation for eutrophication models in reservoirs

    Excessive eutrophication is a major water quality issue in lakes and reservoirs worldwide. This complex biological process can lead to serious water quality problems. Although it can be adequately addressed by applying sophisticated mathematical models, the application of these tools in a reservoir management context requires significant amounts of data and large computation times. This work ...


    By IWA Publishing

  • Development of automatic coagulant dosage control technology for rapid change of raw water quality parameters

    An automatic coagulant dosage control technology for water purification plants was developed to deal with rapid changes of raw water quality parameters. Control logic was developed to decide coagulant dosage based on aluminum concentration in rapid mixing tank water based on results of semi-pilot scale experiments. This logic enabled quick feedback on the excess or lack of coagulant. It was ...


    By IWA Publishing

  • Relationship between water quality parameters and the survival of indicator microorganisms – Escherichia coli – in a stormwater wetland

    Indicator microorganisms – Escherichia coli – in a stormwater wetland controlling non-point source pollution in the Keum River basin was studied and the relationship between water quality parameters and the survival of E. coli was investigated by Pearson correlation analysis based on 16 sets of data collected on dry days. A significant seasonal variation of the ...


    By IWA Publishing

  • Assessment of urbanization/impervious effects on water quality in the urban river Annaba (Eastern Algeria) using physicochemical parameters

    Surface water quality is deteriorating due to the increase of urbanization which increases the load of stormwater and wastewater discharged into rivers. To evaluate the quality of an urban river (Annaba, northeastern Algeria), multivariate statistical analyses were applied to the physicochemical measures of 38 parameters. The application of principal component analysis and factor analysis ...


    By IWA Publishing

  • Multi-parameter identification of a two-dimensional water-quality model based on the Nelder–Mead Simplex algorithm

    To solve the multi-parameter identification problem of a two-dimensional river water-quality model, a new parameter identification method based on the Nelder–Mead Simplex algorithm coupled with the alternating direction implicit method has been constructed to determine hydraulic and water-quality parameters such as the longitudinal dispersion coefficient, the transverse mixing coefficient, and ...


    By IWA Publishing

  • Water quality in healthcare

    Rivers are important freshwater resources for many countries and human beings around the world. Social well being, economics and political development have been largely related to the availability and distribution of these freshwater resources. In many parts of the world the adverse health impacts of water supply from rivers, dam construction, irrigation development and flood mitigation have led ...


    By Inderscience Publishers

  • Water quality model parameter identification of an open channel in a long distance water transfer project based on finite difference, difference evolution and Monte Carlo

    A new method is proposed based on the finite difference method (FDM), differential evolution algorithm and Markov Chain Monte Carlo (MCMC) simulation to identify water quality model parameters of an open channel in a long distance water transfer project. Firstly, this parameter identification problem is considered as a Bayesian estimation problem and the forward numerical model is solved by FDM, ...


    By IWA Publishing

  • Water Quality Models

    ' In order to determine the impacts of a particular discharge on ambient water quality, it is usually necessary to model the diffusion and dispersion of the discharge in the relevant water body. The approach applies both to new discharges and to upgrading of existing sources. This note provides guidance on models that may be applicable in the context of typical Bank projects.' Introduction ...


    By The World Bank

  • Water quality in the Arosa Bay

    Background One of the great impediments to further development of shellfish aquaculture in the north-west region of Spain isa perception that industry expansion and tourism could have negative environmental effects on the coastal waters. Especially the bay around Villagarcia de Arosa is very famous because of its excellent areas for shellfish farming. The government of Spain is ...


    By The OTT Hydromet Group

  • Water quality measurement extreme

    Background The characteristics of the Rio Tinto in the south-west of Spain, near Sevilla, are his ruby colour and the extremely sour pH-value between 0 and 2 pH-units. The river carries a mixture between poisonous heavy metals like copper, nickel, arsenic, iron and cadmium, dissolved in high-percent sulphuric acid. It’s not proved where these unusual conditions come from. As per current ...


    By The OTT Hydromet Group

  • Implementation of an automatic and miniature on-line multi-parameter water quality monitoring system and experimental determination of chemical oxygen demand and ammonia-nitrogen

    An automatic, miniature and multi-parameter on-line water quality monitoring system based on a micro-spectrometer is designed and implemented. The system is integrated with the flow-batch analysis and spectrophotometric detection method. The effectiveness of the system is tested by measuring chemical oxygen demand (COD) and ammonia-nitrogen in water. The results show that the modified system ...


    By IWA Publishing

  • What are the Safety Parameters Followed by Pressure Vessel Manufacturers

    Safety has always been a huge priority where pressure vessels are concerned. The use of poorly designed and manufactured pressure vessels has resulted in the deaths of millions of men and women over the years. To reduce the staggering number of fatalities, pressure vessel manufactures are required to adhere to the standards and guidelines laid down by Government bodies. API and ...


  • Mastering the “Black Art” of Manipulating Modeling Parameters

    Matt White, Senior Wastewater and Drainage Modeler at Earth Tech advises fellow modelers to invest time in calibrating their models.  Calibration is the most important phase of any sewer flow modeling exercise, but is often neglected, says Earth Tech’s Matt White. Poorly calibrated models can have a significant impact on the costs of the modeling process, but just as important, the accuracy ...


    By Innovyze

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