scholarly journals Transformation of the groundwater composition in coastal zone of the Ivankovo reservoir during 20 years

2021 ◽  
Vol 35 (1) ◽  
pp. 3-14
Author(s):  
Elena Lapina ◽  
Larisa Lapina ◽  
Vera Kudryashova
Keyword(s):  
Chemical Composition ◽  
Groundwater Quality ◽  
Atmospheric Precipitation ◽  
Shallow Groundwater ◽  
Winter Period ◽  
Ivankovo Reservoir ◽  
Water Quality Status ◽  
The City ◽  
Term Monitoring

The Ivankovo reservoir is an important source of drinking water for the city of Moscow. The water quality status of aquifers around the reservoir is important for its safety, as groundwater inflow into the reservoir is considerable. The chemical composition of the shallow groundwater around the Ivankovo reservoir is studied. The study is based on long-term monitoring (1999–2019) of both surface and groundwater quality. The aim of the paper is to identify changes in groundwater quality over this period and to determine their causes. The results show that over this 20 year-period, the groundwater quality in the study area shifted from HCO3–Ca to HCO3–Ca-Mg type, proven by statistical methods. The median values of the total dissolved solids (TDS) decreased by 13% in summer and by 17% in winter. It is shown that the ongoing processes of transformation of the groundwater chemical composition are mainly due to climate change, and atmospheric precipitation in the spring-winter period is a possible source of the Mg2+ ion entering the groundwater table. Among other components, concentrations of chlorides and sulfates underwent the largest change, the median values of which have decreased by two or more times, which is caused by both the dilution of the groundwater by melt water and a decrease in the anthropogenic load.

Acidification of shallow groundwater in the unconfined sandy aquifer of the city of Douala, Cameroon, Western Africa: implications for groundwater quality and use

2015 ◽  
Vol 74 (9) ◽  
pp. 6831-6846 ◽  
Author(s):  
G. E. Takem ◽  
D. Kuitcha ◽  
A. A. Ako ◽  
G. T. Mafany ◽  
A. Takounjou-Fouepe ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Shallow Groundwater ◽  
Western Africa ◽  
Sandy Aquifer ◽  
The City

scholarly journals Design and monitoring of energy-active facade module

2020 ◽  
Vol 172 ◽  
pp. 24005
Author(s):  
Nikola Pokorny ◽  
Tomas Matuska ◽  
Vladimir Jirka ◽  
Borivoj Sourek
Keyword(s):  
Central Europe ◽  
Climatic Conditions ◽  
Solar Irradiation ◽  
Winter Period ◽  
Summer Period ◽  
Beam Radiation ◽  
Potential Benefits ◽  
Long Term Monitoring ◽  
Term Monitoring

Testing of two facade modules under outdoor climatic conditions of Central Europe has been performed for more than two years. The paper analyses the results of long-term monitoring and shows potential benefits of prismatic glazing and photovoltaic-thermal (PVT) collectors integrated into one component. The prismatic glazing reflects beam radiation during summer period and transmits it during the winter period. During summer month solar irradiation transmitted through the prismatic glazing can be about 44 % lower compared to conventional triple glazing. Glazed PVT collector generates heat and electricity simultaneously. PVT collector integrated in the façade module can achieve solar yield during summer 58 kWh/m2.month in heat and 6,3 kWh/m2.month in electricity.

Study on the Influence of Shallow Groundwater Source Heat Pumps on Groundwater Quality in Weifang, China

2014 ◽  
Vol 641-642 ◽  
pp. 97-100
Author(s):  
Qiang Huang ◽  
Wei Ping Wang ◽  
Hai Yan Deng
Keyword(s):  
Groundwater Quality ◽  
Heat Pump ◽  
Shallow Groundwater ◽  
Heat Pumps ◽  
Total Hardness ◽  
Project Area ◽  
Research Objects ◽  
Groundwater Source ◽  
Change Curve

Selecting 4 shallow groundwater source heat pump (GSHP) projects as research objects in Weifang city of Shandong province, China, the groundwater quality in the project area was, observed and analyzed by sampling continuously. The results show that the concentrations of chloride and the total hardness are relatively stable, and there are no apparent changes; In the change curve of TDS in different kind of shallow GSHPs, the worse the sealing condition of the project, the more obvious the rising trend of TDS; The concentration of nitrate is generally on the rise, and the concentration of ammonia appears in the trend of first increased then decreased. Therefore, in the region, the shallow GSHPs are not completely free from contamination in the current technology conditions and the application should be controlled and managed strictly. The observation of shallow GSHPs still need be conducted in a long term.

Effect of Wastewater Treated by EM Reused for Irrigation on Shallow Groundwater Quality

2013 ◽  
Vol 409-410 ◽  
pp. 318-324 ◽  
Author(s):  
Chao Yin ◽  
Xiao Hou Shao ◽  
Xiao Wei Zhang ◽  
Liang Ren ◽  
Ting Ting Chang ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Environmental Pollution ◽  
Groundwater Pollution ◽  
Shallow Groundwater ◽  
Wastewater Irrigation ◽  
Irrigation Amount

In allusion to environmental pollution brought about by wastewater irrigation, EM technology was introduced to study the feasibility of EM application in wastewater irrigation. The results show that EC, NO3--N and TN value of EM treatment in shallow groundwater are all less than those of WW treatment as a whole. In all samples, 59.3% NO3--N values are in the alert status, and when irrigation amount reaches 360mm, treatment WW has caused shallow groundwater pollution. TN concentration in treatment WW-3 on June 27 and July 9 is more than 110 mg/L. It suggests that NO3--N can easily penetrate into shallow groundwater with wastewater irrigation and there is insurance of groundwater pollution in the long-term wastewater irrigation. It also indicates that application of wastewater treated by EM reused for irrigation is feasible. TP values are all very low and suggest the pollution of P does not happen.

scholarly journals PREDICTION OF THE DEVELOPMENT OF GROUNDWATER QUALITY IN A FINISHED SLUDGE LAGOON

2018 ◽  
Vol 16 ◽  
pp. 6
Author(s):  
Petr Černoch ◽  
Jiří Košťál
Keyword(s):  
Groundwater Quality ◽  
Input Data ◽  
Drainage System ◽  
Final State ◽  
Area Of Interest ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
By Products

This study deals with prediction of the development of groundwater quality in a finished sludge lagoon. For depositing and predicting secondary float energy by-products, it is appropriate to use mathematical modelling. The implementation of relevant input data from long-term monitoring is suitable as an application for verification as well. The main output was the determination of the necessary priorities and geotechnical risks in solving the final state of the area of interest, especially regarding solving of the drainage system in the subsequently finished sludge lagoon.

scholarly journals Origin and evolution of chemical composition of mineral waters of Szczawno-Zdrój inferred from long-term variation of ionic ratios, Sudetes Mts. (SW Poland)

2021 ◽  
Vol 80 (10) ◽  
Author(s):  
Anastasia Romanova ◽  
Adam Porowski ◽  
Tomasz Zielski ◽  
Andrzej Dancewicz
Keyword(s):  
Chemical Composition ◽  
Climatic Factors ◽  
Atmospheric Precipitation ◽  
Mineral Waters ◽  
Exchange Reactions ◽  
Origin And Evolution ◽  
Ionic Ratios ◽  
Concave Shape ◽  
Term Variation

AbstractThe archival records of chemical composition of mineral waters in Szczawno-Zdrój spa were analyzed in terms of variation of ionic ratios to explain the possible source and origin of the major compounds dissolved in water and evolution of groundwater chemical composition in time. The analyzed data contained the longest available series of chemical records, dating back to 1962, and related to waters discharged by five main springs: Dąbrówka, Marta, Młynarz, Mieszko and Mieszko 14. The research showed that mineral waters in Szczawno-Zdrój belong to shallow meteoric CO2-rich, Rn-containing groundwaters which form their chemical composition mainly through the interaction with aquifer rocks. Detailed analysis of long-term variation of ionic ratios revealed that (1) the carbonates weathering, mostly acid hydrolysis of limestones and dolomites, and (2) the ion exchange reactions with clay minerals, mainly the so-called natural softening, play a fundamental role in formation of the chemical composition of studied waters. Both processes are responsible for the occurrence of dominant ions in solution such as Ca2+, Mg2+, Na+, and HCO3−. The aluminosilicates hydrolysis occurs with variable extent, but plays rather secondary role in formation of chemical composition. The time distributions of major element concentrations in studied waters showed a characteristic “concave” shape, indicating the decrease in concentrations beginning in the 60s and ending around 2005–2010. Such “concave” shape trends are not reflected in time distribution of ionic ratios which strongly suggests the occurrence of a simple dilution of chemical composition of mineral waters by the influx of fresh water. The observed considerable fluctuations of chemical composition of mineral waters in Szczawno-Zdrój are most probably associated with climatic factors, namely: the increased amounts of atmospheric precipitation in particular periods of time and its seasonal distribution. Such influx of fresh waters reduces considerably mineralization of shallow groundwaters and directly increases springs discharge.

scholarly journals Marine monitoring along the eastern coastal area of the Island of Lesvos, Greece during 2004 in the Framework of MEDPOL III

2013 ◽  
Vol 9 (2) ◽  
pp. 83-97
Keyword(s):  
Marine Environment ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phase Iii ◽  
Eastern Coast ◽  
Marine Monitoring ◽  
The City ◽  
Term Monitoring

The present survey was carried out in the framework of MEDPOL Phase III (2004 – 2006), aiming to provide recent information for the long-term monitoring of pollution trends in selected susceptible marine environments along the Mediterranean coastline. Information was collected from a network of four stations spaced out along the eastern coast of the Island of Lesvos, Greece, including a high risk station near the harbour of the city of Mytilini. Pollutants in abiotic components of the marine environment (seawater, sediment) as well as in selected marine organisms (M. barbatus and B. boops) were measured. It was found that there is no evidence of substantial pollution of the marine environment (seawater, sediment and fish) with respect to the pollutants measured. However, it was shown that although the uncontrolled discharge of untreated effluents has been reduced since the beginning of the operation of the Mytilini sewage treatment plant in 2001, sediments near the harbour of the city still carry increased loads of metals of anthropogenic origin. Furthermore, the small quantity of untreated sewerage that still flows out in the harbour of the city seems to affect water quality, since a higher mesotrophic character with eutrophic trends was observed in the area.

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