Water Quality Index as a Tool for Assessment of Status of an Urban Lake of Mumbai (original) (raw)
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Assessment of Water Quality for Determining the Pollution Status of a Famous Lake of North India
2016
Dal Lake has been under tremendous pressure and its pollution seems never ending. In this paper, an attempt has been made to describe the present pollution level in the lake environment with the use of water quality indices. Water quality index seems quite a rational tool in bringing a combination of various water quality parameter data into a single number describing the pollution level in a particular range usually from 0 to 100. Two water quality indices have been used, one is the Weighted Arithmetic Average method which is a specific water quality index used to describe the drinking water quality and the other one is the popular NSF (National Sanitation Foundation) method which describes the general water quality. According to this method, the values indicate that the quality of the water in the lake is of “medium” type. Both the methods indicate that Dal Lake is a dying heritage and immediate and effective restoration measures should be adopted to save this precious jewel other...
Development of a water quality index (WQI) for the Loktak Lake in India
The present work was carried out to assess a water quality index (WQI) of the Loktak Lake, an important wetland which has been under pressure due to the increasing anthropogenic activities. Physicochemical parameters like temperature (Tem), potential hydrogen (pH), electrical conductivity (EC), turbidity (T), dissolved oxygen (DO), total hardness (TH), calcium (Ca), chloride (Cl), fluoride (F), sulphate (SO2 4), magnesium (Mg), phosphate (PO3 4), sodium (Na), potassium (K), nitrite (NO2), nitrate (NO3), total dissolved solids (TDS), total carbon (TC), biochemical oxygen demand (BOD), and chemical oxygen demand (COD) were analyzed using standard procedures. The values obtained were compared with the guidelines for drinking purpose suggested by the World Health Organization and Bureau of Indian Standard. The result shows the higher concentration of nitrite in all the location which is beyond the permissible limit. Eleven parameters were selected to derive the WQI for the estimation of water potential for five sampling sites. A relative weight was assigned to each parameter range from 1.46 to 4.09 based on its importance. The WQI values range from 64 to 77 indicating that the Loktak Lake water is not fit for drinking, including both human and animals, even though the people living inside the Lake are using it for drinking purposes. The implementation of WQI is necessary for proper management of the Loktak Lake and it will be a very helpful tool for the public and decision makers to evaluate the water quality of the Loktak Lake for sustainable management.
Water management practices need a fresh look in order to avoid water crisis in the next two decades. This essentially requires looking for proper management practices for growing economy and population. The water resources of the Lake basins remain almost constant while demand of water for various purposes is increasing. Water pollution as a corollary of accelerated industrial growth has drawn concerns over public health and environment. Water is required for different purposes like domestic, agricultural, hydro-power, navigation, recreation, etc. Utilization in all these diverse uses of water should be optimized and an awareness of water as a inadequate resource should be fostered. Water quality index (WQI) is precious and unique rating to depict the overall water quality status in appropriate treatment technique to meet the concerned issues. This paper elaborates on the WQI concepts and current scenario of Jambhulwadi Lake which will help in future as natural potable groundwater resource. It also focuses on case scenario of calculating WQI using Weighted Arithmetic Water Quality Index an example dataset. The quality of water way to evaluate by testing various physico-chemical parameters such as pH, Temperature, Total Dissolved Solid (
Comparative Assessment of Water Quality of Ashtamudi Lake Through WQI
— the present study was carried out to assess the quality of water and to classify water quality indices at Ashtamudi Lake (Latitude 8º59'N, Longitude76 º 36'E), Kollam district, Kerala, India; is the second largest wetland in Kerala. Due to high anthropogenic activities, urbanization practices, coconut shell retting and fishing activities along the bank habitations increases pollution threat. A Water Quality Index (WQI) is a numeric expression used to evaluate the quality of a given water body and to be easily understood by decision makers. The present study intends to discusses and compares three different water quality indices, viz. arithmetic water quality index, multiplicative water quality index and Oregon water quality index which are considered for characterizing the water quality along Ashtamudi Lake through the assessment of Dissolved oxygen (DO), pH, biochemical oxygen demand (BOD),COD, electrical conductivity, total dissolved solids, turbidity, total alkalinity, total hardness, chloride, nitrate and are used as the parameters for the development of water quality indices. Most of the parameters are not with in the permissible limit except nitrate. Further with the help of software SPSS, the results were correlated. The comparison of different indices gives which water quality index is the best suitable for quality determination. The index function makes easy interpretation of results which in-turn increases the effectiveness of management strategies. The comparison of different indices showed that the arithmetic water quality index is best positively correlated with weighted arithmetic water quality index.
2021
This study demonstrates and analyses spatio-temporal changes and trends of 15 water quality parameters that were arbitrated from the samples collected at 11 sampling locations during the water quality monitoring across the Dal Lake from September 2017 to August 2020. Further a revised WQI (named WQImin) was developed contingent on multiple regression modeling comprising six key parameters (NH4-N, DO, COD, WT, TUB and NO3-N) so as to ease the course of action and lessen the systematic costs of the water quality assessment. The results signify that the general mean WQI value 81.9 and seasonal average WQI values ranges from 79.44 to 84.55. The quality of water showed seasonal variance, with lowest values in summer, succeeded by autumn and winter, and highest in spring. Moreover, the suggested WQImin model contingent on the selected six critical parameters displayed execution in the evaluation of Dal Lake’s water quality with R2 = 0.99, RMSE value (5.48) and PE value of 6.34%. This mani...
A systematic study has been carried out to assess the Water Quality Index of Chandola Lake, Ahmedabad, Gujarat, India. Water samples from ten sampling sites were collected and analyzed for physico-chemical parameters (electrical conductivity, total dissolved solids, pH, dissolved oxygen, alkalinity, total hardness, calcium, magnesium, chloride, nitrate and biological oxygen demand). The study area experiences a seasonal climate and broadly divided into three seasons as monsoon (June to September), winter (October to January) and summer (March to May). The samples were collected and analyzed for one year from September 2013 to August 2014. Each parameter was compared with the standard desirable limit of that parameter in lake water as prescribed by different agencies. The analytical data of various physico-chemical parameters indicates that some parameters like total dissolved solids, pH, alkalinity, total hardness and calcium was beyond the permissible limit according to WHO and BIS standards for drinking purpose in the year. The WQI value indicates that water samples of summer and monsoon season were unsuitable for drinking.
Water Quality Index (WQI) of Sarangpani Lake, Bhopal (India
The present study was deals with water quality index (WQI) of Sarangpani Lake from July to December 2007 in Bhopal (MP). In the present study it was observed that water quality index of lake water excellent (48.08) for fish culture. The assessment of correlation coefficient (r) between all parameters of sampling stations (S 1 and S 2). A systematic correlation coefficient (r) is perfect / high significance (0.8 < r < 1.0) level with positive relationship between all parameters. Water quality index based on physic-chemical parameters indicate that water quality of lake is suitable for fish culture and drinking purpose.
Water Quality Index for Assessment of Rudrasagar Lake Ecosystem, India
Water quality of lakes, rivers and reservoirs in developing countries like India is being degraded because of the contaminated inflows and surrounding influence. There is a serious need for appropriate water quality monitoring for future planning and management of Lake and other type of water resources. Quality of water in Rudrasagar Lake, Tripura, India has been investigated in this paper. Water Quality Index (WQI) was applied in Rudrasagar Lake India using water quality parameters like pH, Turbidity, Conductivity, Hardness, Alkalinity, Dissolved Oxygen, Biochemical Oxygen Demand and Nitrate. Based on the importance of the parameter for aquatic life the relative weight is assigned to each water quality parameter ranged from 1 to 4. Tests were performed on site using electronic measuring device as well as on Laboratory with samples of water collected from different locations of Rudrasagar Lake. It shows that water quality of Rudrasagar Lake falls within the ‗good water' category but marginally. Continuous monitoring of Rudrasagar lake is suggested for proper management.