Abstract
In many countries such as Iran, social and industrial developments changed the qualitative characteristics of the river‘s water quality and leads to excessive pollution. The first step for river water quality management is obtaining information on changes of river water quality in dimensions of time and place and also, determination of major sources of pollutants. WQI is a mathematical and statistical tool for conversion of quantitative values of large quantity of water quality data into single number which presents a simple and understandable tool for qualitative assessment. In current study, samples were collected from stations at up, middle and downstream of three rivers in Mazandaran province (Siahrod River, Haraz River and Babolrod River) in a 2 years interval of 2012-2013 years. The values of NSFWQI (water quality index of America’s national health organization) were calculated for all stations and all of the stations were located on the level of unsuitable conditions. According to NSFWQI, the best condition was related to the upstream of Haraz River and the worst condition was related to the downstream of Siahrood River.
Highlights
The increased use of water resources, unnatural manipulation and changes in river water quality have been increased
The obtained values of NSFWQI at stations are as follows, which shows that the water quality at all stations are unsuitable according to Table 4 and Figure 2
According to the obtained results, it is required that each river be investigated more closely as case study and with selection of more stations to specify the sources of pollutants
Summary
The increased use of water resources, unnatural manipulation and changes in river water quality have been increased. In all around the world, human activities have profound effects on rivers and lakes. The first step for keeping river water quality and purification of polluted parts is obtaining information on the qualitative changes of river water in dimensions of time and place and determination of major sources and various water pollutants (Oguchi, T., 2009, SahaP., 2010). Analysis of measured parameters alone or in combination, give incomplete information on water quality because of variety of parameters, samples and stations. Mathematical-computer qualitative modeling of river water needs broad hydrodynamic and hydrological information (Silva f., et al, 2000, Ormsbee, L., 2006). Water quality index (WQI) is developed to solve this problem. WQI is first represented by Brown in 1970
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
