scholarly journals Contamination of Dhanmondi and Gulshan Lake Waters with Some Metals and Inorganic Pollutants

1970 ◽  
Vol 34 (1) ◽  
pp. 89-93 ◽  
Author(s):  
Muhammad Zamir Hossain ◽  
Gazi Md Ahsanul Kabir ◽  
Shamshad Begum Quraishi

Air, soil and water are continuously being polluted by the anthropogenic activities andsometimes by natural calamities. Among the three components, water pollution perhaps is the mostimportant one. The contamination of water resources and biota is of major concern especially inindustrialized countries because of the discharge of toxic, persistent and bio-accumulativesubstances from various sources. Household wastes dumped by the city dwellers contribute also toa great extent to the pollution of urban areas.Key words: Contamination; Lake waters; Metals; Inorganic pollutantsDOI: 10.3329/jbas.v34i1.5495Journal of Bangladesh Academy of Sciences, Vol.34, No.1, 89-93, 2010

2020 ◽  
Author(s):  
shaobo long

<p><strong>The response of extreme rainstorm to global </strong><strong>climate pattern changes in the loess plateau</strong></p><p>Shaobo Long<sup>1,3</sup>、Jianen Gao<sup>1,2,3*</sup>、Huijuan Li<sup>5</sup>、Zhe Gao<sup>4</sup>、minmin Qiang<sup>1,3</sup>、Sixuan Liu<sup>1,3</sup></p><ol><li>Institute of Soil and Water Conservation, Northwest Agriculture and Forestry University, 712100, Yangling, Shaanxi, China.</li> <li>Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, 712100, Yangling, Shaanxi, China.</li> <li>Research Center on Soil and Water Conservation, Ministry of Water Resources, 712100, Yangling, Shannxi, China.</li> <li>College of Water Resources and Architectural Engineering, Northwest Agriculture and Forestry University, 712100, Yangling, Shaanxi, China.</li> <li>Institute of Geographic Sciences and Natural Research, CAS, 100101, Beijing, China.</li> </ol><p><strong>Abstract: </strong>The loess plateau is the region with the most serious soil and water problems in the world, the soil erosion mainly occurs in the season of rainfall, especially the extreme rainstorm has great influence on soil erosion. In recent years, under the background of global climate change, extreme rainstorm occurs frequently in the loess plateau, causes a series of soil damage, was difficult to predict. Therefore, it is a great significance to study the rule of extreme rainstorm for the soil erosion in the loess plateau. Based on the daily rainfall data of 56 meteorological stations and global sea surface temperatures (SST) data in the last 60 years, the effects of El Niño on extreme rainstorm were studied by using empirical orthogonal function (EOF), wavelet transform, and other statistical methods. The results show:</p><ul><li>(1) The extreme rainstorm has obvious spatial distribution characteristics, which decreases gradually from the south to the north of the loess plateau; Temporal variation of extreme rainstorm has obvious decadal oscillation, showing a decreasing trend from 1982 to 2012 and an increasing trend after 2012.</li> <li>(2) There was a significant positive correlation between the time coefficient of EOF1 for SST and the extreme rainstorm (P < 0.05). Wavelet analysis shows that Both extreme rainstorm and SST anomaly have a 30-year cycle, with the time change becoming more dramatic after 2012.</li> <li>(3) El Niño has obvious influence on the extreme rainstorm in the loess plateau region. Extreme rainstorm can be predicted about 1 year in advance by the change of SST anomaly. This is of great significance to the study of extreme rainfall erosion in the loess plateau.</li> </ul><p><strong>Keywords: The loess plateau; Extreme rainstorm; El Niño</strong></p><p><strong>Funding:</strong></p><ol><li>The National key Research and Development Program of China (No.2017YFC0504703).</li> <li>National Natural Science Foundation of China (No. 41877078, 41371276).</li> <li>Knowledge Innovation Program of the Chinese Academy of Sciences (No.A315021615).</li> </ol>


2006 ◽  
Vol 49 (6) ◽  
pp. 936-936 ◽  
Author(s):  
Galip Yuce ◽  
Arzu Pinarbasi ◽  
Sakir Ozcelik ◽  
Didem Ugurluoglu

2005 ◽  
Vol 49 (3) ◽  
pp. 359-375 ◽  
Author(s):  
Galip Yuce ◽  
Arzu Pinarbasi ◽  
Sakir Ozcelik ◽  
Didem Ugurluoglu

2019 ◽  
Vol 42 (1) ◽  
pp. 83-90
Author(s):  
Ang Kean Hua

Abstract River water pollution has been reported globally. In suggestion to adapt sustainability approach, this study carry out to tests the structural equation model between sustainable development and water resources management in the Malacca River basin (Malaysia). The model consists of six latent constructs (anthropogenic activities; law, regulation and policy; land and water ecosystem; Malacca River; river water pollution; sustainability) and twenty four items based on 400 questionnaires which were completed and returned by the local residents of Malacca state. Selected study area is within Malacca River basin. The result show the Malacca River is influenced by water law-regulation-policy (β = 0.546, p < 0.001), anthropogenic activities (β = 0.145, p < 0.001), river water pollution (β = 0.142, p < 0.001), land and water ecosystem (β = 0.105, p < 0.01), as well as sustainable approach (β = 0.127, p < 0.5). It was found that a sustainable approach and water law-regulation-policy have a direct influence on anthropogenic activities, river water pollution, as well as the land and water ecosystem. In conclusion, this study suggests developing an earlier approach of the model involved with water resources management and sustainable development.


Author(s):  

Despite the significant amount of water resources, Russia is characterized by their uneven distribution over the territory. As a result, a number of regions are characterized by low water availability, due to both physiographic factors and the specifics of the settlement and economic development of the country. This article presents the specific water availability evaluation data calculated for all constituent entities of the Russian Federation, taking into account the resources of both river and lake waters. The calculation of water availability due to lake waters is based on new assessment data on lakes water resources, carried out at the Institute of Limnology, Russian Academy of Sciences. On the basis of the obtained values of water availability, the regions of the greatest water deficit are outlined and their lake fund is estimated. At present almost 60% of the population of Russia lives in regions with low and medium water availability, including about 20% in regions where water availability is characterized as “very low” and “catastrophically low”. Most of these regions belong to the zone of insufficient moisture, however, a number of regions of the zone of sufficient moisture also experience excessive pressure on water resources due to high population. Most of the regions with low and medium water availability have significant reserves of water contained in artificial reservoirs, the total volume of which exceeds 100 km3. In addition, a number of regions also have significant reserves of lake water, including fresh water. Lakes located in the zone of insufficient moisture and characterized by low water availability contain a total of ~ 37 km3 of water, including ~ 20 km3 of fresh water. At the zone of sufficient moisture in the lakes of regions with low water availability ~ 2.4 km3 of fresh water is contained.


2018 ◽  
Vol 28 (55) ◽  
pp. 936-958
Author(s):  
César Henrique Valentino ◽  
Fábio Carnieto ◽  
Antônio Donizetti Gonçalves de Souza

O presente estudo visou identificar as áreas susceptíveis à poluição do solo e da água referente aos postos de combustíveis na área urbana de Poços de Caldas (MG). O estudo possui grande importância para o município, pois este é bastante conhecido pela qualidade de suas águas e este tipo de análise gera o reconhecimento quanto a qualidade ambiental local do solo e água, identificando-se áreas com grande potencial poluidor. Realizou-se o levantamento da legislação ambiental pertinente aos postos de combustíveis, e levantou-se o cadastro dos postos de combustíveis na área urbana bem como suas coordenadas geográficas e por fim foi elaborado o mapa de susceptibilidade a poluição do solo e da água na área urbana do município por meio de uma álgebra de mapas em sistemas de informação geográfica utilizando-se a técnica de análise hierárquica ponderada. Com a realização do cadastro dos postos de combustíveis foi possível verificar como é tratado esse tipo de controle pela prefeitura da cidade. Como consequência do cadastramento dos postos de combustíveis obteve-se a criação de um banco de dados destes postos em Poços de Caldas, e por meio da sobreposição dos pontos dos postos de combustíveis verificou-se que estes em sua maioria encontram-se em áreas não tão adequadas a este tipo de atividade.Palavras-chave: Poluição. Solo. Água. Postos de combustíveis. Susceptibilidade à poluição.Abstract  The present study aimed to identify susceptible areas to soil and water pollution related to fuel stations in the urban area of Poços de Caldas–MG. The survey of data is very important for the city because this type of study is related to the quality of water. This type of analysis generates the recognition of the local environmental quality of the soil and water, which is identified areas with polluting potential. A survey of the environmental legislation pertinent to the fuel stations was carried out, and the register of the fuel stations in the urban area, as well as their geographic coordinates, was drawn up. Finally, a map of susceptibility to soil and water pollution was drawn up. Using urban areas of the city with map algebra and geographic information systems by the Analytic Hierarchy Process technique and the registration of the fuel stations, it was possible to verify how this type of control is handled by the city hall of Poços de Caldas. By the consequence of the registration of the fuel stations, a database of these stations was created in Poços de Caldas, and by the overlapping of the points of the fuel stations, it was found that the majority of these stations are located in areas not so appropriate for this type of activity.Keywords: Pollution. Soil. Water. Fuel stations. Susceptibility to pollution.


Thoothukudi city has many heavy industries and a very busy port. It has a resident population of 410, 760. The supply of water to meet the needs of this population is a huge challenge. People are dependent on groundwater and surface water resources present in the city. In view of the industrial activities within the city, the contamination characteristics of these water resources and their suitability for human consumption needs to be evaluated. 13 groundwater samples from various localities of the city and 5 lake water samples were analysed to understand the physical, chemical and microbiological properties. Heavy metals such as As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, Zn, and Mo were analysed in the samples. None of the samples were found to be suitable for human consumption. The major contaminants were Cd, Hg, As, and coliform bacteria. The heavy metals were found to be from 1.2 to 211 times that of the acceptable limits.


2012 ◽  
Vol 19 (2) ◽  
pp. 197-211 ◽  
Author(s):  
Aleksandra Ziemińska-Stolarska ◽  
Jerzy Skrzypski

Review of Mathematical Models of Water Quality Water is one of the main elements of the environment which determine the existence of life on the Earth, affect the climate and limit the development of civilization. Water resources management requires constant monitoring in terms of its qualitative-quantitative values. Proper assessment of the degree of water pollution is the basis for conservation and rational utilization of water resources. Water quality in lakes and dams is undergoing continuous degradation caused by natural processes resulting from eutrophication and due to anthropogenic reasons. One of the tools that are used to solve problems of surface water pollution is modelling of changes which take place in lake waters and associated water quality changes. In the last thirty years a rapid development of mathematical modelling of water resources quality has been observed. A number of computer models have been designed which are successfully applied in practice in many countries, including Poland. This paper presents an overview of mathematical models for assessment of water quality in dam reservoirs. Description of the WASP program which will be used for modelling water quality in the Sulejow Reservoir was the focal point.


2018 ◽  
Vol 5 (1) ◽  
pp. 102-107 ◽  
Author(s):  
Jane Qiu

Abstract Water is scarce in China. The country ekes by with only one-quarter of the global average for water per person. The scarcity is exacerbated by rampant pollution—with devastating consequences on ecosystems, food supply and public health. In the face of growing population, water pollution threatens the very survival of the Chinese nation. In his speech at the 19th National Congress of the Communist Party of China last October, President Xi Jinping repeatedly emphasized the importance to redress the balance between economic development and environmental protection. One of his most frequently cited phrases is ‘clean waters and lush mountains are gold and silver’. And he has matched his rhetoric with action. In April 2015, the State Council, China's cabinet, issued the Water Pollution and Control Action Plan (known as Shuishitiao or Water Ten Plan)—widely hailed as the toughest and most comprehensive water policy to date. Last October, it announced a five-year plan to tackle water pollution, with a budget of 700 billion yuan (US$106 billion). The country's top legislature has also revised the Water Prevention and Control Law, which will go into effect in early 2018. In a forum chaired by National Science Review’s Executive Editor-in-Chief Mu-ming Poo, a panel of experts of diverse backgrounds and perspectives discussed the current status of China's water resources, their views on the comprehensive policy package, how national initiatives have been going, what the challenges are and why information transparency and public participation are absolutely essential in environmental protection. Weijiang Liu Hydrologist at the Chinese Academy for Environmental Planning, Ministry of Environmental Protection, Beijing, China Ji Shen Environment scientist at Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China Chunmiao Zheng Hydrologist at Southern University of Science and Technology, Shenzhen, China Jun Ma Founder and director of the non-governmental organization Institute of Public and Environmental Affairs, Beijing, China Tao Tao Environment scientist at the College of Environmental Science and Engineering and the Key Laboratory of Yangtze River Water Environment at Tongji University, Shanghai, China Mu-ming Poo (Chair) Director, Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, China


1991 ◽  
Vol 20 (2) ◽  
pp. 162-165 ◽  
Author(s):  
Peter M. Groffman ◽  
William R. Wright ◽  
Arthur J. Gold ◽  
Peter V. August ◽  
Charles G. McKiel

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