Top Research Papers on Water Quality

The quality of water is expressed through a number called Water Quality Index. Physico-chemical and Biological parameters available in water under examination are used to arrive at this number. Measured content of the pollutant, ideal content and standard content for safe use determine this number. Whereas the ideal content and measured one are fixed for a sample, the standard content varies from country to country and from agency to agency. Thus, WQI arrived at by using different standards may vary, if the standard values differ. Presently measured results and standard values of different cou...

South Africa, like many developing countries, faces significant challenges in the sustainable provision of adequate and safe water services. A well recognised challenge is water quality management by municipalities, with many municipalities continuing to have inadequate water treatment and the associated water quality management practises in place; Both affect the provision of safe drinking water and the controlled discharge of treated effluent into the environment.

A water quality index provides a single number that expresses overall water quality at a certain location and time based on several water quality parameters. Water quality index (WQI) is valuable and unique rating to depict the overall water quality status in a single term that is helpful for the selection of appropriate treatment technique to meet the concerned issues. These indices utilize various physico-chemical and biological parameters and have been resulted as an outcome of efforts and research and development carried out by diff erent government agencies and experts in this area global...

Water quality modelling is an important tool used in various water quality management proceedings throughout the world. There are many types of models available, both commercially and as freeware for application in various hydrologic environments. The accuracy of a model in representing the myriad of physico- chemical and biological processes is entirely dependent on underlying mathematical formulations which form the basis of the model as well as the competency of the model developer or modeller. Data requirements, morphology, kinetics, model limitations, calibration and model validation all ...

Output of Indian Hydrology Project Phase II, Technical Assistance (Implementation Support) and Management Consultancy.

Water quality index (WQI) is valuable and unique rating to depict the overall water quality status in a single term that is helpful for the selection of appropriate treatment technique to meet the concerned issues. However, WQI depicts the composite influence of different water quality parameters and communicates water quality information to the public and legislative decision makers. In spite of absence of a globally accepted composite index of water quality, some countries have used and are using aggregated water quality data in the development of water quality indices. Attempts have been ma...

Water quality index (WQI) is valuable and unique rating to depict the overall water quality status in a single term that is helpful for the selection of appropriate treatment technique to meet the concerned issues.WQI has been calculated by for five lakes at Haveri town in the pre and post monsoon seasons. WQI depicts the composite influence of different water quality parameters and communicates water quality information to the public and legislative decision makers. The water quality index indicated that most of the lakes come under poor category indicating the non suitability of water for hu...

This paper summarizes some of the key issues which have been considered in developing proposals for a scheme of classifying river quality for the purpose of setting water quality objectives on a statutory basis. Particular attention is given to (a) the relationship between use-related and general water quality targets, (b) the role of biological assessment, and (c) the requirements of EC directives. Following widespread consultation on the proposals, it was concluded that a clear distinction should be made between sets of ‘use classes’which would serve to set statutory water quality objectives...

Employing a unique and rich data set of water quality attributes in conjunction with detailed household characteristics and trip information, we develop a mixed logit model of recreational lake usage and undertake thorough model specification and fitting procedures to identify the best set of explanatory variables, and their functional form for the estimated model. Our empirical analysis shows that individuals are responsive to the full set of water quality measures used by biologists to identify the impaired status of lakes. Thus, changes in these quality measures are not simply a scientific ...

In a spot check analysis in various countries, the importance of Aeromonas sp.

La qualite de l'eau affecte la qualite du lait. Une enquete a ete menee dans 30 fermes australiennes: elle traduit le desir de 90% des exploitants agricoles d'etre relies au reseau de distribution d'eau traitee, en milieu rural.

In addition to improving the allocative efficiency of water use, water markets may reduce irrigation-related water quality problems. This potential benefit is examined with a nonlinear programming model developed to simulate agricultural decision-making in a drainage problem area in California's San Joaquin Valley. Results indicate that a 30% drainage goal is achievable through improvements in irrigation practices and changes in cropping patterns induced by a water market. Although water markets will not generally achieve a least-cost solution, they may be a practical alternative to economical...

This chapter identifies the role environmental tracking plays in identifying public health water hazard and water quality issues and provides an integrated overview of water and diseases by combining knowledge of the hydrologic cycle.

The aim of this work is to introduce the potential of satellite-based remote sensing data to agencies responsible for monitoring and managing water quality in the coastal zone of Western Australia. There exists a knowledge and/or expertise gap between satellite data providers and potential end users. This project aims to close the gap by developing a fundamental management tool that will be geographically transferable around the State and Australian Coastal Zone and which will be able to provide information at local, regional and statewide spatial scales, as required for management. We expect ...

For 30 years, I have received questions about the quality of water that should be used for removal of coatings. How much dissolved material or minerals gets left on the surface? Just recently after an hour lon webinar to 200 people, the questions was “What shoul the quality of the water be?” Among the first comments which I received on the WJ standards documents came from Singapore: The complaint was that we didn’t advocate cleaning with brackish or filtered seawater.” Just recently in 2015, a Sherwin Williams representative talked about the methodology in Brazil where WJ was being used for pr...

Different aspects of water treatment in the particular situation of hemodialysis, including softeners, de-ionisators, reverse-osmosis, charcoal filters, ultraviolet irradiation, a.o.o., and a correct water circuit are discussed.

As much as 3.0 million acre-feet of Colorado River water are used every year to irrigate more than 500,000 acres of lands in the Imperial Valley. Surface and subsurface drainage water from irrigated fields enters the Salton Sea which serves as a drainage sink for the Imperial and Coachella Valleys since its formation in 1905. The Salton Sea continues to exist because of the drainage water from agriculture in Imperial and Coachella Valleys as well as flow from agricultural drainage and untreated and partially treated wastewater from the Mexicali Valley. The salinity of the Sea is over 46,000 pp...

By analyzing the conflict between the theoretical model and the actual applications of traditional water resource evaluation,this article elaborates the process and essential elements of self-recovery and artificial recovery of water quality within the City-River basin Systems.This article proposes a water resource model of water quality recovery and water exchange and further defines the marginal conditions and applicable scope.In doing so,the comparison between urban wastewater reuse and recycle has been made,where water reuse has been defined at a river-basin level and can be expressed as i...

Present study is carried out for the assessment of ground water quality and comparing its suitability for drinking purpose in Ambur city in Tirupattur District, Tamil Nadu, India. Water quality index is calculated on the basis of pH, conductivity, total dissolved solids, total hardness, Ca2+, Mg2+, Na+, K+, Cl-, alkalinity, and SO42- content of the water samples. Water quality index study show that the ground water quality of the study area is deteriorated due to high value of total dissolved solids, conductivity, total hardness, calcium, magnesium, chloride, and sulphate in water samples.

A highway-bidirectional long short-term memory (Highway-BiLSTM)-based water quality classification tool for potential integration into an edge-enabled water quality monitoring system to facilitate on-site water quality classification and demonstrates rare errors in accurately classifying complex water quality samples.

In the present study, an attempt has been to develop a new water quality index (WQI) method that depends on the Iraqi specifications for drinking water (IQS 417, 2009)  to assess the validity of the Euphrates River for drinking by classifying the quality of the river water at different stations along its entire reach inside the Iraqi lands. The proposed classifications by this method are: Excellent, Good, Acceptable, Poor, and Very poor. Eight water quality parameters have been selected to represent the quality of the river water these are: Ion Hydrogen Concentration (pH), Calcium (Ca), Magnes...

Some introductions are conducted on the present status and development on water quality simulation.Problems existed in the management and design of distribution network are analyzed,corresponding solutions are put forward and finally the orientation of water quality management is also discussed.

Water quality is assessed through the biological, physical and chemical parameters. The limits of these parameters that are harmful to human health have been established at national or international level (WHO, EPA, MECC) by various laws, regulations, normative. An efficient and simplified to express the quality of water for consumption is given by the water quality index. It reflects the quality of water in a single value by comparing data obtained from the investigation of a number of physico-chemical and bacteriological parameters with existing limits. This number is placed on a relative sc...

The Nagoya Waterworks and Sewerage Bureau has developed original supporting tools for the systematic and cost-effective management of problem solving and a processing tool of voluminous data was practical for rapid judgment of water quality.

Impact of agricultural practices ontile water quality water quality , Impact of agricultural practices ontile water quality water quality , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

The paper presents a comprehensive review of elements in water quality improvements especially on the technology to be used. The current technology applied in the activity of water quality is one of the most important information for the relevant agencies of water. Water resources in Malaysia come in the forms of rivers, lakes, ponds and groundwater. Lakes and ponds are important water resources naturally or constructed in Malaysia. Rapid pace of the development surrounding many of the water catchment area had significant effects on the quality of water bodies. Management of water resources is...

The availability of water in terms of both quantity and quality is essential to the very existence of mankind. Earlier people recognized the importance of water from quantity view point. Recognition of the importance of water quality developed more slowly. In the field of water resource management, information on the water quality is an essential input. Changes in water quality can be the result of domestic, industrial or agricultural discharges. The number of physical and chemical parameters such as pH, DO, alkalinity, conductivity, total solids, hardness, inorganic and organic trace elements...

The invention discloses a water quality detecting device, a water quality monitoring system and an operation method of the water quality monitoring system. The water quality detecting device comprises a data acquiring module for acquiring water quality information of waters, a wireless communication module for obtaining the water quality information acquired by the data acquiring module and sending the water quality information to a water quality monitoring center and a power management module for managing a power supply of the water quality detecting device. The water quality monitoring syste...

For at least two decades the water quality in Lake Wateree has been the focus of much attention by state and local governments, lake property owners, Duke Energy, and the University of South Carolina (USC). Several locations on or near the lake are on the state 303(d) list for excess nutrients or the consequences of excess nutrients. Most nutrient loading is from sources upstream in the Catawba River watershed. From 1999‐2003 the all‐volunteer Lake Wateree Water Watch (WW) group conducted monthly sampling for field parameters at 19 locations in the lake. The monitoring effort resumed in 2008 w...

The recent drought has certainly taken a toll on animals, pastures, crops, and water sources. Although many producers are concerned about low stocks of stored feeds, it is important to remember the importance of water as a nutrient. Animal performance depends heavily on adequate water intake and quality. Drought conditions can potentially affect all sources of water, including groundwater, but surface waters are especially vulnerable.

The quality control in analysis on water quality is the control of the errors of analytical results in substance. People should Induce and arrange these obtained analytical data by using the knowledge of statistics, do well the quality control in the analysis on water quality inside the laboratory, restricting the precision and accuracy of the analytical results within the allowable limits, and further controlling the quality of analytical results in normal works by using these limits.

The effect of the water alkalinity and the water hardness on noodle quality was reviewed.This research provided a certain theory for noodle processing technology through discussing cooking quality and measuring Texture Profile Analysis(TPA) of noodle.

This paper explores how maps can support water quality management as part of a common project between a water management organization and a research laboratory.

Water rights constitute the oldest institutional arrangement for control of water quality, but recent decades have seen extensive development of alternative controls. These new mechanisms for water quality management have replaced the system of water rights as the primary institution for quality control, but these rights still function in an important supplementary capacity. Any qualitative change that substantially interferes with other legally recognized uses of water is in violation of water rights, but the determination of whether a particular quality alteration is in violation of the righ...

Prikazane su osnove modeliranja kakvoce vode u vodotocima uz koristenje jednodimenzionalnog modela QUAL2E. Od mjerodavnih parametara kakvoce vode, odabrani su otopljeni kisik, BPK-5, temperatura, dusik i fosfor. Posebni naglasak je stavljen na važnost primjene modeliranja kakvoce voda u vodotocima za potrebe procjene utjecaja ispustanja otpadnih voda i određivanje potrebnog stupnja prociscavanja.

水産増養殖を推進す るにあた って,生 物の飼育環境 を良好な状態 に維持 ・管理す ることは,甚 だ重要で あ る。 と くに,多 量の水を使用 して生 物を飼育す ること が可能な場合 には,そ れ は比較的容易であ るが,少 量 の水 しか使用で きない場合 には,そ のために多大な努 力を必要 とす る。19世 紀中頃 に出現 した水族館 は水 生生物の飼育 に砂濾過方式を採用 し,少 量の水を循環 濾過 して能率 よ く使用 し,生 物の高密度飼育 に成功 し て,今 日に至 って いる。 東京都 は上野動物園開園百周年の記 念事 業 と して, 平成元年10月,葛 西臨海公園 は江戸川区内の葛西臨海 公園 に水族園を開園 した。旧江戸川 と荒川にはさまれ, 眼の前 には東京湾葛西沖の三枚洲を眺望で きる,面 積 77ヘ クタールの公園であ る。 この公園の ほぼ中央 に面 積8ヘ クタールの東京都葛西臨海水族園があ る。水族 園 は鉄筋 コンク リー ト3階 建で,延 べ床面積 は約12,0 00m2で ある。展示水槽 は 「大洋の航海者:マ グロ ・サ メ」,「海そ うの林」,「七つ の海か ら:北 太平 洋 ・南 太平洋 ・イン ド洋 ・大西洋 ・南極洋」,「深海の生物」, 「タ ッチプ ール」,「 海 鳥 の生態 」,「 小 笠原 の磯 」, 「伊豆七島の海」,「...

U poglavlju su navedeni moguci izvori vode za navodnjavanje, kao i najvežnije kvalitativne karakteristike vode pogodne za primjenu u navodnjavanju.

This essay focused on both the health effects of water-borne illnesses and the quality of the water, which is the element that supports life the most as an element that sustains life.

KEYWORD: recreational water park, water quality, dissolved organic carbon, turbidity, chemical feature ABSTRACT: Water park water quality impacts the public health illustrated by the increasing waterborne diseases outbreaks in recent years. Water samples were thus collected and analyzed for chemical constituents, organic matter, from the water park over spring and summer. Water quality varied seasonally with less contaminated in spring compared with summer (p<0.01), which likely corresponds to the number of visitors. Turbidities were in the range of 0.5 to 3 NTU and dissolved organic carbon (D...

Water quality index (WQI) is valuable and unique rating to depict the overall water quality status in a single term that is helpful for the selection of appropriate treatment technique to meet the concerned issues. However, WQI depicts the composite influence of different water quality parameters and communicates water quality information to the public and legislative decision makers. In spite of absence of a globally accepted composite index of water quality, some countries have used and are using aggregated water quality data in the development of water quality indices.

A new method to treat fluoride-contaminated water using magnesium oxide has been developed at IISc, which relies on precipitation, sedimentation, and filtration techniques and is efficient for a range of groundwater chemistry conditions.

This data represents the results of the 2008 Section 303(d) List of Water Quality Limited Waters (303(d) List). This List contains all NJ waters (represented as assessment units) and associated parameters not meeting applicable NJ Surface Water Quality Standards (N.J.A.C. 7:9B). The data identifies each assessment unit assessed as not attaining the applicable designated use based on the 2008 Integrated Water Quality Monitoring and Assessment Methods, and the parameter causing non-attainment. The 2008 303(d) List was published as Appendix B of the 2008 Integrated Water Quality Monitoring and As...

This report is a collection of comprehensive water quality data from citizen monitors known as the Water Watchdogs. Water quality data includes pH, total dissolved solids, turbidity, dissolved oxygen, nitrate etc.

The utility model provides a water quality controller for a water tank. A controller system comprises a water tank (17) and a water quality controller (10). The upper end of the water quality controller (10) is communicated with a vent of the water tank via an air communicating pipe (11); the lower end of the water quality controller (10) is communicated with the water tank in a standardized water line (20) via a water communicating pipe (14); the top end of the water tank (17) is sealed by a water tank cover (16); water flows into the water quality controller (10) via a floater water inlet va...

Technical, behavioral, and institutional constraints have hampered the integration of water quality and water resources planning. Although the conceptual relationship between water resources and water quality planning has changed remarkably in the past few years, only minor advances have been made in true integration. The evolution of water quality planning and development has taken place in an institutional structure almost the reverse of planning and management of water resources. Most of the water quality advances have been made at the local or regional level while water resources activitie...

A research on the participation of a mining community in Zimbabwe to assess the water quality that they consume.

During the last years, natural water resources like ponds, lakes, and rivers have faced a significant threat due to mismanagement of activities like the discharge of untreated industrial effluents, sewage water, wastes, etc. Water plays an essential role in all aspects of our lives. Therefore, detecting water pollutants causing contamination is imperative to sustain the quality of life. Therefore, it became mandatory to examine water quality to ensure that only safe water is available for us and other biological life. Thus, accurate sensors have become increasingly necessary, providing precise...

Ground water demand in India has significantly increased as a result of the country's fast population development, industrialization, and urbanization. Using a water quality index, or WQI helpful numerical instrument for deriving complex information from any water body and for reporting and analyzing it. WQI is essentially a mathematical method for calculating a single value from a set of test results. Any WQI model can explain the degree of water contamination with a single number, depending on several of water quality indicators at a particular place and time. In this work, an effort has bee...

Development of Water Quality Index (WQI) as a result of NSF-WQI modification is an advanced design process of WQI that has been carried out in 2016. The progress of IKA was determined through verification of the constituent component of WQI, comprising sub index curve, parameter weighting, and field verification of WQI formulation results. Field verification was conducted at eight locations of the Ciliwung River. The results indicated that the WQI score obtained from the water quality testing result in the laboratory and field verification results by panelists conducted at the same time indica...

The physicochemical parameters of water play an important role in determining aquatic life and its development. In this study, the water quality index is used in order to assess the water quality in river Lepenci River. For the calculations of this index, eighteen physicochemical parameters were analysed, which were measured in 3 years during the years 2009, 2010 and 2014 in three stations of the main flow of river Lepenci during all months of the years. From the results, it is concluded that the better quality of water was in station SP1- Brezovica with a WQI value of 83 and it belongs to the...