Chemometric and trend analysis of water quality of the South Chennai lakes: an integrated environmental study

2014 ◽  
Vol 29 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Giridharan Loganathan ◽  
Suresh Krishnaraj ◽  
Jayaprakash Muthumanickam ◽  
Ravichandran K
Keyword(s):  
Water Quality ◽  
Trend Analysis ◽  
Environmental Study ◽  
The South

scholarly journals Variation Characteristics of the Main Hydrochemical Indexes in Typical Subterranean Rivers in the South China Karst Region Based on Curve Fitting

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Shuyi Liu ◽  
Chuan Liang ◽  
Lina Wang ◽  
Lingwei Zeng ◽  
Chunyi Wang
Keyword(s):  
Water Quality ◽  
South China ◽  
Spline Interpolation ◽  
Correlation Coefficients ◽  
Industrial Society ◽  
Karst Region ◽  
The South ◽  
Karst Areas ◽  
Variation Characteristics

The water quality of subterranean rivers in the South China Karst region has undergone dramatic changes resulting from industrial and social development over the past 60 years. The combination of sampling results from subterranean rivers in four typical study areas in the South China Karst region from October to December 2015 (dry season) and correlation analysis using SPSS revealed that the main ions K+, Na+, and SO42- exhibited a significant correlation (p<0.01) and that Ca2+, HCO3-, and Mg2+ exhibited a good correlation (p<0.01). Additionally, we consolidated the data collected since 1960 and, by applying MATLAB, a variety of fitting curve methods were used to fit all the data, and the results showed that cubic spline interpolation fitting performed the best. The squared correlation coefficients (R2) of the obtained fitting curves for Ca2+, HCO3-, and Mg2+ are 0.8545, 0.8689, and 0.7632, respectively, and the corrected R2 values are 0.6739, 0.7088, and 0.4853, respectively. The R2 values of the obtained fitting curves for K+, Na+, Cl-, SO42-, and NO3- are 0.9085, 0.8964, 0.7531, 0.6222, and 0.7997, respectively, and the corrected R2 values are 0.7904, 0.7669, 0.5272, 0.2815, and 0.6127, respectively, indicating excellent fits. Based on the fitting curves, the overall water quality conditions in the karst region were analyzed and compared. Finally, the development of subterranean rivers in the South China Karst region was determined. Based on the results, the following conclusions can be drawn: the development of the subterranean rivers is indeed a slow process, but water quality can change rapidly in response to the transformation of industrial society. Additionally, the results indicate the crucial importance of urban planning that takes into account environmental protection during development in karst regions. This study aims to provide a basis for the management of karst areas and the improvement of groundwater quality by evaluating geochemical processes.

Assessing the environmental impact of water discharge in a sensitive near-shore marine environment

2013 ◽  
Vol 53 (1) ◽  
pp. 301 ◽  
Author(s):  
Katrina Hall ◽  
Scott Chidgey
Keyword(s):  
Water Quality ◽  
Marine Environment ◽  
Environmental Quality ◽  
Water Discharge ◽  
Monitoring Program ◽  
Toxicity Testing ◽  
Treated Wastewater ◽  
Environmental Study ◽  
Environment Protection

Esso’s Long Island Point facility has been operating for more than 40 years beside Western Port in Victoria, and has discharged treated wastewater and storm water to the bay for most of these years. The 2001 State Environment Protection Policy Schedule F8 for Waters of Western Port is part of Victoria’s Environment Protection Authority’s (EPA) legal framework for licensing discharges to the waters of Victoria, and requires that discharges ‘cause no detrimental change in the environmental quality of the receiving waters, as determined by an environmental monitoring program’. As part of Esso’s ongoing commitment to continuous improvement, a major upgrade to the water treatment facility was completed to further improve the quality of waters discharged to Western Port. In conjunction with this upgrade, Esso is undertaking a study on the effects of the discharge on the environmental quality of Western Port. This peer-reviewed paper presents an example of the practical application of managing discharges to ensure that the stated environmental values of a receiving environment are protected. The environmental study focuses on four key aspects of marine-environment quality relevant to key Western Port ecosystem values in the vicinity of the facility’s effluent discharge, which are: ambient water quality; seagrass biomass; jetty pile epibiota; and, ecological risk through toxicity testing. The study demonstrates the implications of basing regulatory requirements on the quality of the site-specific environmental characteristics, rather than merely effluent quality and generalised water quality objectives. Furthermore, it validates the need for sound science to underpin regulatory limits and industry practices when operating in sensitive environments.

Numerical Study on the Impact of the Sewage Drainage on Water Quality of Shanghai Water Sources

2012 ◽  
Vol 433-440 ◽  
pp. 1020-1026 ◽  
Author(s):  
Jie Gu ◽  
Wen Ting Li ◽  
Jing Huang ◽  
Bing Han
Keyword(s):  
Water Quality ◽  
Yangtze River ◽  
Numerical Study ◽  
Water Source ◽  
The Yangtze River ◽  
The South ◽  
Tidal Period ◽  
High Pollution ◽  
The Impact

A 2D current and water quality model was set up with Delft3D-FLOW in this research, which was well calibrated and verified with the observed tidal levels and velocities. Considered with the project of the Qingcaosha Water Source, Pollution concentration distribution caused by sewage outfalls in the south bank of the Yangtze River during a neap tide of dry season is simulated and the computed results show: a high pollution zone appears near the south shore, and moves upward with flood flow and downward with ebb flow, however, it is bounded a limit region around the outfalls. During the tidal period, the water quality of the Qingcaosha water source can be classified as the second class water, which can ensure the normal water supply as the Shanghai water source. It is suggested that the regular monitoring water quality in this high pollution zone should be put into practice to ensure the water quality of water sourecs. The Yangtze River is adjacent to the East Sea and it’s the largest river in China, with obvious seasonal variant runoff and tidal flow. The Yangtze River was bifurcated by Chongming Island to south and north branch from Xuliujing, most of the flow go down through the south branch. The south branch was divided into south and north channel by Changxing Island and Hengsha Island. The south channel was bifurcated by Jiuduansha Shoal to south and north passage, three bifurcation areas and four estuarine outlets were formed (see Fig 1.)

Influence of natural and anthropogenic factors on the water quality of the coastal waters around the South Andaman in the Bay of Bengal

2015 ◽  
Vol 78 (1) ◽  
pp. 309-331 ◽  
Author(s):  
Renjith VishnuRadhan ◽  
Divya David Thresyamma ◽  
Kamal Sarma ◽  
Grinson George ◽  
Prabhakar Shirodkar ◽  
...  
Keyword(s):  
Water Quality ◽  
Bay Of Bengal ◽  
Coastal Waters ◽  
Anthropogenic Factors ◽  
The South ◽  
South Andaman ◽  
Natural And Anthropogenic Factors

The Evaluation Groundwater Quality in Daqing Oilfield by Using Logging Data

2014 ◽  
Vol 955-959 ◽  
pp. 3088-3092
Author(s):  
Yu Bo Yang ◽  
Zhong Jun Deng
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Groundwater Quality ◽  
The South ◽  
High Quality ◽  
Well Location ◽  
Sand Body ◽  
Resistivity Logging ◽  
Better Than

In order to research the groundwater quality of the Taikang Formation in Tertiary in west of Daqing Oilfield, resistivity logging data of 140 wells in the study area were used to analyze the relations between the groundwater quality and sedimentary sand body and buried depth. The south area of Hongweixing well area and the east of Xishuiyuan well area, including Ranghulu, Qianjincun, Dulitun and Nanshuiyuan well area are favorable for high quality groundwater. The shallower buried water quality is better than the deeper buried water quality of the Taikang Formation in Tertiary. The research provides the evidences to evaluate the groundwater quality in west Daqing Oilfield and determine specific well location, improving the efficiency of exploring the underground drinking water.

Long term trend analysis and suitability of water quality of River Ganga at Himalayan hills of Uttarakhand, India

2021 ◽  
Vol 22 ◽  
pp. 101405
Author(s):  
Amit Kumar ◽  
A.K. Taxak ◽  
Saurabh Mishra ◽  
Rajiv Pandey
Keyword(s):  
Water Quality ◽  
Trend Analysis ◽  
Term Trend ◽  
River Ganga ◽  
Long Term Trend

scholarly journals The Release of Endogenous Nitrogen and Phosphorus in the Danjiangkou Reservoir: A Double-Membrane Diffusion Model Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Zhiqi Wang ◽  
Hongxin Ren ◽  
Zhaolong Ma ◽  
Zhihong Yao ◽  
Pengfei Duan ◽  
...  
Keyword(s):  
Water Quality ◽  
Diffusion Model ◽  
Membrane Diffusion ◽  
The South ◽  
Overlying Water ◽  
Double Membrane ◽  
Danjiangkou Reservoir ◽  
Significant Difference ◽  
Endogenous Contamination

Endogenous contamination from the newly submerged sediment may have an impact on the water quality of the Danjiangkou Reservoir, the water source of the middle route of the South-to-North Water Diversion Project. In this study, in situ sediment samples were collected at different locations (Guojiashan (DJK1), Kongqueyuan (DJK2), Shijiagou (DJK3), Shiqiao Wharf (DJK4), and Songgang Wharf (DJK5) from the north to the south) of the Danjiangkou Reservoir and the upstream tributary using a columnar sediment sampler and statically cultured in laboratory, and the distribution and release of endogenous N and P from the sediment were investigated based on a double-membrane diffusion model. The results showed that the P contents in the main reservoir and the upstream tributary followed the order of inorganic   phosphorus   IP > organic   phosphorus   OP > calcium − phosphorus   Ca − P > iron − phosphorus   Fe − P > labile   phosphorus   LP . IP accounted for the largest proportion (47.10-59.70%) of total phosphorus (TP), while LP accounted for only a small proportion (0.10-0.90%) of TP. There is a significant difference in the spatial distribution of P at different sampling points, especially for the OP content (226.90 mg·kg-1) with a coefficient of variation of 26.90%. The contents of different forms of P and NH4+-N decreased from the upstream tributary to the main reservoir, which was mainly attributed to the land use type. In the vertical distribution, the contents of different forms of P in DJK4 and DJK5 decreased with the increase of sediment depth. The contents of NH4+-N and PO43--P in the sediment interstitial water of DJK4 and DJK5 were higher than those in the overlying water. In addition, the contents of NH4+-N and PO43--P were higher in DJK5 than that in DJK4. The static culture experiments showed that N and P were mainly released from the sediment-overlying water interface to the overlying water. The release rate of NH4+-N and PO43--P ranged from 13.08 mg·(m2·d)-1 to 21.39 mg·(m2·d)-1 and from 3.06 mg·(m2·d)-1 to 6.02 mg·(m2·d)-1, and the release amount calculated based on the double-membrane diffusion model was 1.17 × 10 3  t·a-1 and 0.53 × 10 3  t·a-1, respectively. Thus, endogenous contamination from the newly submerged land is an important factor affecting the water quality of the Danjiangkou Reservoir.

scholarly journals Influence of Triassic deposits on water quality of some karstic aquifers to the south of Alicante (Spain)

2010 ◽  
Vol 66 (1) ◽  
pp. 131-138 ◽  
Author(s):  
J.M. Andreu ◽  
E. García-Sánchez ◽  
A. Pulido-Bosch ◽  
S. Jorreto ◽  
I. Francés
Keyword(s):  
Water Quality ◽  
The South
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