scholarly journals Automatic measurement of the water quality of urban rivers.

1998 ◽  
Vol 27 (7) ◽  
pp. 511-517
Author(s):  
Hitoshi ITO
Keyword(s):  
Water Quality ◽  
Automatic Measurement ◽  
Urban Rivers

scholarly journals EVALUATING FUTURE WATER QUALITY OF URBAN RIVERS IN HANOI UNDER EFFECT OF URBANIZATION AND CLIMATE CHANGE - THE APPLICATION OF WEAP MODEL FOR CAU BAY RIVER

2020 ◽  
Vol 58 (3A) ◽  
pp. 195
Author(s):  
Lan Huong Nguyen ◽  
Viet Nga Thi Tran
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Treatment Plant ◽  
Dry Season ◽  
Capital City ◽  
Master Plan ◽  
Urban Rivers ◽  
Water Drainage ◽  
Wet Season

Every day, up to 750,000 cubic meters of wastewater in Hanoi metropolitan areas is discharged directly into rivers and lake, of which only 10% is treated to the Vietnamese standards. According to the water drainage development master plan for the capital city of Hanoi until 2030, the government aim at dealing with flooding and improve environmental sanitation for local residents. With respect to the baseline and Master plan implementation scenarios, this study evaluates the future water quality of urban rivers in Hanoi under the effect of urbanization and climate change using Water Evaluation And Planning tool (WEAP) and take the Cau Bay catchment as the case study. The result shows that, without implementation of wastewater treatment plant, the water quality of Cau Bay River will be worse with the DO in dry season is 0.2-1.2 mg/l and BOD is 52.0-55.0 mg/l. With the implementation of Master plan, the level of DO and BOD would be 7.1-7.3 mg/l and 7.0-13.8 mg/l respectively in the dry season whereas the values are 3.7 mgO/l and 36.1-41.8 mg/l in the wet season. The degradation of wastewater during the wet season is results from the combine- overflow sewage system as designed in the master plan.

scholarly journals Considering Water Quality of Urban Rivers from the Perspectives of Unpleasant Odor

2018 ◽  
Vol 10 (3) ◽  
pp. 650 ◽  
Author(s):  
Yukako Sado-Inamura ◽  
Kensuke Fukushi
Keyword(s):  
Water Quality ◽  
Urban Rivers ◽  
Unpleasant Odor

scholarly journals Ecological assessment of water quality in an urban river replenished with reclaimed water: the phytoplankton functional groups approach

2021 ◽  
Author(s):  
Liying Zhu ◽  
Yuanyuan Chen ◽  
Yawei Wang ◽  
Chunrong Wang ◽  
Yuansong Wei
Keyword(s):  
Water Quality ◽  
Reclaimed Water ◽  
Ecological Status ◽  
Ecological Assessment ◽  
Dry Season ◽  
Urban Rivers ◽  
Wet Season ◽  
The North ◽  
Phytoplankton Functional Groups

Abstract Comprehensive water quality assessment plays a vital role in decision making for the sustainable management of urban rivers, and thus the exploration of integrated ecological assessment methods for water quality has become a major requirement. This study assessed the water quality of the North Canal River on the basis of its ecological status using the phytoplankton functional groups (PFGs) approach. The river runs through the megacities of the Beijing-Tianjin-Hebei region in China, and is mainly replenished with reclaimed water. The results showed that the PFGs approach is much better for evaluating the water quality of urban rivers than the conventional physicochemical index method and phytoplankton diversity metrics, because the PFGs approach is more sensitive to the spatiotemporal variations in the water quality of urban rivers. The average Qr index, for ecological status estimation in rivers, based on the PFGs of the North Canal River was 3.30, indicating “good” water quality. In the dry season, the dominant PFG upstream was group D (Cyclotella spp.), whereas the major downstream PFGs had changed to group Y (Glenodinium spp., Cryptomonas ovata, and Cryptomonas erosa) and W1 (Euglena spp. and Gonium pectoral). While the dominant PFG throughout the river changed to TB: Melosira spp. in the wet season. The Qr at each site was one to two grades lower during the wet season than the dry season, indicating that water quality was worse in the wet than the dry season.

scholarly journals Vulnerability Assessment and Application of Bacterial Technology on Urban Rivers for Pollution Eradication

2015 ◽  
Vol 2015 ◽  
pp. 1-11
Author(s):  
Sarfraz Hashim ◽  
Xie Yuebo ◽  
Fiaz Ahmad ◽  
Chaudhry Arslan ◽  
Muhammad Saifullah
Keyword(s):  
Water Quality ◽  
Point Source ◽  
Oxygen Demand ◽  
Principal Component ◽  
Aquatic Organism ◽  
Ammonia Nitrogen ◽  
Complex Data ◽  
Urban Rivers ◽  
Source Information

To protect against the environmental pollution, the present research was undertaken to enumerate the Bacterial Technologies (BTs) on the restoration of polluted urban rivers, that is, Fenghu-Song Yang River (FSR) and Xuxi River (XXR). Experimental research accounted for the physiochemical parameters (pH; temperature; dissolved oxygen (DO); chemical oxygen demand (COD); total phosphorus (TP); total nitrogen (TN); and ammonia nitrogen (NH3N)) before and after the BT operation. The results declared that the BT is efficient to restore the polluted rivers up to reliable condition. These results were analyzed by using multivariate statistical techniques (principal component analysis (PCA) and cluster analysis (CA)). These techniques interpreted the complex data sets and expressed the point source information about the water quality of these rivers at SA5, SA6, and SB3 under highly polluted regions. For better understanding, water quality index (WQI) was applied to compute the single numeric value. WQI results are evidence of the above results which prove the water quality of both rivers faced under outrageous condition (below 50 WQI scores) before the BT treatment, but, after the treatment, the rivers were restored from fair to good level (above 50 WQI scores) and overall output of these scores was quite similar to detect the point source of pollution. These results described an abrupt recovery of the urban rivers up to reliable condition for aquatic organism and clear effluents from the rivers.

Spatial and Temporal variation analysis of water quality of Hemavathi River, Karnataka, India

2018 ◽  
Vol 6 (9) ◽  
pp. 196
Author(s):  
Santhosh K. M ◽  
S. Prashanth
Keyword(s):  
Water Quality ◽  
Agricultural Runoff ◽  
Spatial And Temporal Variation ◽  
Final Conclusion ◽  
Variation Analysis ◽  
Pollution Load ◽  
Quality Of Water ◽  
Pollution Loading ◽  
Origin Point

Urban development, agricultural runoff and industrialization have contributed pollution loading on the environment.  In this study Hemavathi river water from a stretch from its origin point to its sangama was studied for pollution load by determining parameters of water quality like pH, Alkalinity,  Ca, Mg, Nitrate, TDS, BOD, COD , and the results were compared with WHO and BIS standards to draw final conclusion on the quality of water.

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