scholarly journals A Few Solutions for Improving the Water Quality of Polluted Rivers and Canals in Vietnam: A Case of Ho Chi Minh City

2021 ◽  
Author(s):  
Tan Danh Nguyen
Keyword(s):  
Water Quality ◽  
Ho Chi Minh City ◽  
Polluted Rivers

The use of benthic diatoms in estimating water quality of variously polluted rivers

2009 ◽  
Vol 38 (1) ◽  
Author(s):  
Ewelina Szczepocka ◽  
Bogusław Szulc
Keyword(s):  
Water Quality ◽  
Benthic Diatoms ◽  
Polluted Rivers

The use of benthic diatoms in estimating water quality of variously polluted rivers

scholarly journals INTEGRATED EVALUATION MODEL FOR SURFACE WATER QUALITY A CASE STUDY IN HO CHI MINH CITY, VIETNAM

2018 ◽  
Vol 54 (4B) ◽  
pp. 232
Author(s):  
Thu Thi Minh Nguyen
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Evaluation Model ◽  
Surface Water Quality ◽  
Ho Chi Minh City ◽  
Radiation Characteristics ◽  
Effective Evaluation ◽  
Quality Of Water

The quality of water is a measure of a number of characteristics that impact on its condition.  Parameters affecting the water quality are classified as having chemical, physical, biological and radiation characteristics.  However there is uncertainty as to whether or not a water sample meets set standards in quality if two or more parameters need to be considered.  Therefore, this study is to develop an effective evaluation model, adopting fuzzy logic, to assess the quality of water.  Using a case study in Ho Chi Minh, Vietnam, a model has been developed and applied the collected surface water monitoring data in 2015.  The results obtained from this model are then compared to the results gained from Vietnam national water quality index established in 2011.

scholarly journals History of water quality parameters – a study on the Sinos River/Brazil

2015 ◽  
Vol 75 (2 suppl) ◽  
pp. 1-10 ◽  
Author(s):  
GB Konzen ◽  
JAS Figueiredo ◽  
DM Quevedo
Keyword(s):  
Water Quality ◽  
Water Resources ◽  
Environmental Protection Agency ◽  
Descriptive Analysis ◽  
Historical Analysis ◽  
Quality Parameters ◽  
Main River ◽  
Polluted Rivers ◽  
Populated Region

<p>Water is increasingly becoming a valuable resource, constituting one of the central themes of environmental, economic and social discussions. The Sinos River, located in southern Brazil, is the main river from the Sinos River Basin, representing a source of drinking water supply for a highly populated region. Considering its size and importance, it becomes necessary to conduct a study to follow up the water quality of this river, which is considered by some experts as one of the most polluted rivers in Brazil. As for this study, its great importance lies in the historical analysis of indicators. In this sense, we sought to develop aspects related to the management of water resources by performing a historical analysis of the Water Quality Index (WQI) of the Sinos River, using statistical methods. With regard to the methodological procedures, it should be pointed out that this study performs a time analysis of monitoring data on parameters related to a punctual measurement that is variable in time, using statistical tools. The data used refer to analyses of the water quality of the Sinos River (WQI) from the State Environmental Protection Agency Henrique Luiz Roessler (Fundação Estadual de Proteção Ambiental Henrique Luiz Roessler, FEPAM) covering the period between 2000 and 2008, as well as to a theoretical analysis focusing on the management of water resources. The study of WQI and its parameters by statistical analysis has shown to be effective, ensuring its effectiveness as a tool for the management of water resources. The descriptive analysis of the WQI and its parameters showed that the water quality of the Sinos River is concerning low, which reaffirms that it is one of the most polluted rivers in Brazil. It should be highlighted that there was an overall difficulty in obtaining data with the appropriate periodicity, as well as a long complete series, which limited the conduction of statistical studies such as the present one.</p>

scholarly journals Reduction in Water Pollution in Yamuna River Due to Lockdown Under COVID-19 Pandemic

2020 ◽  
Author(s):  
Mohammad Arif ◽  
Rajesh Kumar ◽  
shagufta Parveen
Keyword(s):  
Water Quality ◽  
Transmission Rate ◽  
Yamuna River ◽  
Infected People ◽  
The Earth ◽  
Essential Services ◽  
Polluted Rivers ◽  
The Government ◽  
Day By Day

<p>The epidemic of Novel COVID-19 was<b> </b>reported in India in January 2020 and increased day by day due to the movement of people from abroad to India and then to the different parts of the country. The COVID-19 has been declared as pandemic because of its high transmission rate and coved more than 2010 countries of the world. Under this scenario when there is no medicine for its treatment, the only solution to this problem is to break the chain of transmission and restrict the count of infected people. To contain a coronavirus (COVID-19) outbreak, the Government of India announced the nationwide lockdown with effect from the midnight of 24<sup>th</sup> March 2020 followed by the extension of the lockdown periods and presently it is in its 4<sup>th</sup> phase. The various provisions were made under lockdown for closing the industries, transportation, etc. except the essential services. It has been very interesting to note that the behavioural changes in nature are highly positive and atmosphere, hydrosphere, and biosphere are rejuvenating and it gives an appearance that the earth is under lockdown for its repairing work. Under this natural recovery, we tried to look at the improvement in the water quality of the Yamuna River in Delhi, which has been one of the burst polluted rivers. To study this river, the concentrations of pH, EC, DO<sub>, </sub>BOD, and COD have been measured which showed a reduction by 1-10%, 33-66%, 51%, 45-90%, and 33-82% respectively during the lockdown phase in comparison to the pre-lockdown phase. The Nizamuddin Bridge, Okhla U/s, Najafgarh Drain and Shahdara Drain were the major hotspots responsible for the deterioration of the water quality of Yamuna River while passing by Delhi region. Five major locations of Yamuna River have been analysed in this paper that showed a very impressive recovery of the water quality during the lockdown phase as compared to the pre-lockdown status of water quality. </p>

scholarly journals Assessment of water quality of some aquaculture ponds in Ho Chi Minh City

2018 ◽  
Vol 10 (2) ◽  
pp. 79-84
Author(s):  
Thi Giang Huong Duong ◽  
Thuan Minh Nguyen ◽  
Ngoc Han Tran
Keyword(s):  
Water Quality ◽  
Chlorophyll A ◽  
Surface Water Quality ◽  
Threshold Value ◽  
The Other ◽  
Ho Chi Minh City ◽  
Technical Regulation ◽  
Freshwater Aquaculture ◽  
Aquaculture Ponds

Eutrophication in aquaculture ponds is one of the major issues related to both the environment and the health of consumers. This study has selected and conducted a water-quality survey of nine freshwater aquaculture ponds in Ho Chi Minh City. The empirical results showed that these ponds were seriously polluted with COD and BOD5 whose values did not meet the B2 column of the Vietnamese National Technical Regulation on Surface Water Quality (QCVN 08-MT:2015/BTNMT). On the other hand, most N-NH4+ and N-NO2- concentrations in the ponds met the threshold value of B2 column. The values ​​of the chlorophyll-a are greater than 10 μg/L, indicating that investigated ponds are in a state of eutrophication. In addition, the results of the TSI calculations showed that most of the sites that are in hyper-eutrophication state and phosphorus is identified as the eutrophication limit factor in these sites. Phú dưỡng hóa nguồn nước nuôi trồng thủy sản là một trong các vấn đề lớn liên quan đến cả môi trường và sức khỏe người tiêu dùng. Nghiên cứu này đã lựa chọn và tiến hành khảo sát chất lượng nước của chín ao hồ nuôi thủy sản trên địa bàn thành phố Hồ Chí Minh. Kết quả phân tích cho thấy các ao hồ trên bị ô nhiễm hữu cơ nặng với thông số COD và BOD5 đều không đạt chuẩn B2 theo quy chuẩn kỹ thuật quốc gia về chất lượng nước mặt (QCVN 08-MT:2015/BTNMT). Về mặt ô nhiễm các chất dinh dưỡng, nồng độ N-NH4+ và N-NO2- đa số chỉ thỏa mãn loại B2, thậm chí vượt ngưỡng quy định của cột B2. Các giá trị của thông số chlorophyll-a đều lớn hơn 10 µg/L, chứng tỏ các ao hồ khảo sát đều đang trong tình trạng phú dưỡng. Thêm vào đó, kết quả tính toán chỉ số TSI cho thấy hầu hết các vị trí nghiên cứu đang ở trạng thái siêu phú dưỡng và photpho được xác định là yếu tố giới hạn sự phú dưỡng của các vị trí khảo sát nêu trên.

scholarly journals Reduction in Water Pollution in Yamuna River Due to Lockdown Under COVID-19 Pandemic

2020 ◽  
Author(s):  
Mohammad Arif ◽  
Rajesh Kumar ◽  
shagufta Parveen
Keyword(s):  
Water Quality ◽  
Transmission Rate ◽  
Yamuna River ◽  
Infected People ◽  
The Earth ◽  
Essential Services ◽  
Polluted Rivers ◽  
The Government ◽  
Day By Day

<p>The epidemic of Novel COVID-19 was<b> </b>reported in India in January 2020 and increased day by day due to the movement of people from abroad to India and then to the different parts of the country. The COVID-19 has been declared as pandemic because of its high transmission rate and coved more than 2010 countries of the world. Under this scenario when there is no medicine for its treatment, the only solution to this problem is to break the chain of transmission and restrict the count of infected people. To contain a coronavirus (COVID-19) outbreak, the Government of India announced the nationwide lockdown with effect from the midnight of 24<sup>th</sup> March 2020 followed by the extension of the lockdown periods and presently it is in its 4<sup>th</sup> phase. The various provisions were made under lockdown for closing the industries, transportation, etc. except the essential services. It has been very interesting to note that the behavioural changes in nature are highly positive and atmosphere, hydrosphere, and biosphere are rejuvenating and it gives an appearance that the earth is under lockdown for its repairing work. Under this natural recovery, we tried to look at the improvement in the water quality of the Yamuna River in Delhi, which has been one of the burst polluted rivers. To study this river, the concentrations of pH, EC, DO<sub>, </sub>BOD, and COD have been measured which showed a reduction by 1-10%, 33-66%, 51%, 45-90%, and 33-82% respectively during the lockdown phase in comparison to the pre-lockdown phase. The Nizamuddin Bridge, Okhla U/s, Najafgarh Drain and Shahdara Drain were the major hotspots responsible for the deterioration of the water quality of Yamuna River while passing by Delhi region. Five major locations of Yamuna River have been analysed in this paper that showed a very impressive recovery of the water quality during the lockdown phase as compared to the pre-lockdown status of water quality. </p>

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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