scholarly journals Funkcjonowanie osadników i zbiorników przepływowych w warunkach zlewni miejskiej i podmiejskiej (Sokołówka i Dzierżązna)

2016 ◽  
Vol 70 (2) ◽  
pp. 83 ◽  
Author(s):  
Adam Bartnik
Keyword(s):  
Urban Space ◽  
River System ◽  
Fish Farming ◽  
Small Rivers ◽  
Water Runoff ◽  
Temperature Conductivity ◽  
Quality Of Water ◽  
Before And After ◽  
Hydrological System ◽  
The Impact

<p>The presence of small artificial water reservoirs is typical of the landscape of small agricultural catchments. The old mill dammings are used today mostly for recreation and fish farming. Moreover, they are a very important part of the hydrological system of small rivers, stabilizing and shaping the discharge and physico-chemical characteristics of water. Coupled with the landscape function of the ponds goes their functioning in conditions of strong human pressure in the urban space. A canalized rivers in the urban parts of its courses picks up rubbishes washed down from the surface and coming from a storm sewer system and sometimes from leachate from a sanitary sewage system.</p><p>An example of hydrological systems operating in such environments are Dzierżązna and Sokołówka catchments (Fig. 1). The first one is located north of Zgierz in the impact zone of the city of Łódź. Despite agro-forestry character, a significant impact on water quality is the chalets area and the A2 motorway crossing the catchment. The Sokołówka catchment is flowing through the urban area of the Łódź city. Both of the river flows are highly variable, and the water is heavily contaminated and has a high load of suspension (Tab. 1)</p><p>In both of the catchments the role of artificial reservoirs created to improve the quality of water is the important issue. In the Dzierżązna catchment the several retention and infiltration ponds are working for regulating the outflow from the A2 motorway. In the Sokołówka valley the biofilter has been recently built (Fig. 2). It was constructed in order to purify urban storm- and waste water (sequential biofiltration system of Sokołówka – SSBS). The main purpose of the constructed SSBS was to remove sediments, suspended solids, particulate pollutants, petroleum hydrocarbons, heavy metals, nutrients and bacterial contamination from storm-water runoff through sedimentation and filtration mechanisms.</p><p>The paper discusses the construction of both systems and technical solutions. To evaluate the effectiveness of their operation analyzed changes in the basic characteristics of physicochemical water parameters (water temperature, conductivity (SEC), pH, the concentration of dissolved oxygen, turbidity (NTU)) measured before and after both of cleansing systems in the year and multiyear (Fig. 3, Fig. 4).</p><p>Attention has been also paid to the distribution of the mineral sediment deposited on the bottom of the biofilter SSBS system (Fig. 5). It was found that lowering the temperature in the winter and the appearance of a compact ice cap adversely affect the ability of biofilm to absorb pollutants causing (relative to the hot half year) an increase of conductivity, a higher pH and reducing of oxygenation of water.</p><p>Identified mean changes of the selected physicochemical parameters of water discharged from the area of the A2 motorway to the Dzierżązna river system and as a result of the SSBS system operation to Sokołówka river (Fig. 6).</p><p>All the measured parameters are reduced after passing through both of systems. As a result of mechanical sedimentation the greatest reduction is suspended material transported by water – in the SSBS on average about 16% less than in untreated waters (in the Dzierżązna catchment this element was not measured). The pH of the water in both systems changes to the same extent – decreases by 10% in the Dzierżązna, and 7% in SSBS.</p>

scholarly journals Model-aided quantification of dissolved carbon and nitrogen release after windthrow disturbance in an Austrian karst system

2016 ◽  
Vol 13 (1) ◽  
pp. 159-174 ◽  
Author(s):  
A. Hartmann ◽  
J. Kobler ◽  
M. Kralik ◽  
T. Dirnböck ◽  
F. Humer ◽  
...  
Keyword(s):  
Forest Disturbance ◽  
Inorganic Nitrogen ◽  
Climate Projections ◽  
Dissolved Carbon ◽  
Quality Of Water ◽  
Before And After ◽  
Doc Production ◽  
Hydrological System ◽  
Karst Systems ◽  
The Impact

Abstract. Karst systems are important for drinking water supply. Future climate projections indicate increasing temperature and a higher frequency of strong weather events. Both will influence the availability and quality of water provided from karst regions. Forest disturbances such as windthrow can disrupt ecosystem cycles and cause pronounced nutrient losses from the ecosystems. In this study, we consider the time period before and after the wind disturbance period (2007/08) to identify impacts on DIN (dissolved inorganic nitrogen) and DOC (dissolved organic carbon) with a process-based flow and solute transport simulation model. When calibrated and validated before the disturbance, the model disregards the forest disturbance and its consequences on DIN and DOC production and leaching. It can therefore be used as a baseline for the undisturbed system and as a tool for the quantification of additional nutrient production. Our results indicate that the forest disturbance by windthrow results in a significant increase of DIN production lasting  ∼  3.7 years and exceeding the pre-disturbance average by 2.7 kg ha−1 a−1 corresponding to an increase of 53 %. There were no significant changes in DOC concentrations. With simulated transit time distributions we show that the impact on DIN travels through the hydrological system within some months. However, a small fraction of the system outflow (< 5 %) exceeds mean transit times of > 1 year.

scholarly journals Model aided quantification of dissolved carbon and nitrogen release after windthrow disturbance in an Austrian karst system

2015 ◽  
Vol 12 (14) ◽  
pp. 11987-12026 ◽  
Author(s):  
A. Hartmann ◽  
J. Kobler ◽  
M. Kralik ◽  
T. Dirnböck ◽  
F. Humer ◽  
...  
Keyword(s):  
Forest Disturbance ◽  
Inorganic Nitrogen ◽  
Climate Projections ◽  
Base Line ◽  
Dissolved Carbon ◽  
Quality Of Water ◽  
Before And After ◽  
Hydrological System ◽  
Karst Systems ◽  
The Impact

Abstract. Karst systems are important for drinking water supply. Future climate projections indicate increasing temperature and a higher frequency of strong weather events. Both will influence the availability and quality of water provided from karst regions. Forest disturbances such as windthrow can disrupt ecosystem cycles and cause pronounced nutrient losses from the ecosystems. In this study, we consider the time period before and after the wind disturbance period (2007/08) to identify impacts on DIN (dissolved inorganic nitrogen) and DOC (dissolved organic carbon) with a process-based flow and solute transport simulation model. Calibrated and validated before the disturbance the model disregards the forest disturbance and its consequences on DIN and DOC production and leaching. It can therefore be used as a base-line for the undisturbed system and as a tool for the quantification of additional nutrient production. Our results indicate that the forest disturbance by windthrow results in a significant increase of DIN production lasting ∼3.7 years and exceeding the pre-disturbance average by 2.7 kg ha−1 a−1 corresponding to an increase of 53 %. There were no significant changes of DOC concentrations. With simulated transit time distributions we show that the impact on DIN travels through the hydrological system within some months. But a small fraction of the system outflow (< 5 %) exceeds mean transit times of > 1 year.

scholarly journals Environmental impact of the Midia Port - Black Sea (Romania), on the coastal sediment quality

2016 ◽  
Vol 8 (1) ◽  
pp. 174-194 ◽  
Author(s):  
Irina Catianis ◽  
Constantin Ungureanu ◽  
Luca Magagnini ◽  
Elisa Ulazzi ◽  
Tiziana Campisi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Oil Spills ◽  
Environmental Concern ◽  
Sediment Quality ◽  
Industrial Wastes ◽  
Anthropogenic Sources ◽  
Water Runoff ◽  
Quality Of Water ◽  
Wide Range ◽  
The Impact

AbstractThe aim of the study was to evaluate the impact of potential pollution sources, mainly from the upstream anthropogenic sources and port-related activities. The in-vestigated area covered a wide range of anthropogenic im-pacts (e.g., industrial wastes, storm water runoff, acciden-tal oil spills, intentional discharges and shipping activities). The quality of water and Sediments was assessed us-ing Standard methods, as physical-chemical parameters, chemistry and biology (microbiology, ecotoxicology) aim-ing to figure the level of pollution and the effect of port-related activities. Seawater quality results agreed generally with environmental Standards. Though, in some samples the concentrations of sulphates (mg/1) and heavy metals (μg/1), as B, As and Se exceeded the recommended lim-its, without posing a serious environmental concern. Most of the surface sediment samples contain critical levels of hydrocarbons (C>12), (mg/kg), polycyclic aromatic hydrocarbons (ng/g) and polychlorobiphenyls (ng/g). For some heavy metals (mg/kg), exchangeable concentrations were found to be very close or above the regulations. The signifi-cance of this study is incontestable taking into account the lack of previous relevant historical data of this area. In this sense, it was possible to indicate, in general, good environmental conditions, despite the industrial and concentrated local port-related activities in the investigated area.

scholarly journals Mathematical model in assesment of saltwater intrusion in Saigon – Dong Nai river system (Southern Vietnam) due to sea level rise

2014 ◽  
Vol 17 (3) ◽  
pp. 94-102 ◽  
Author(s):  
Thong Chi Ho ◽  
Ngo Van Dau ◽  
Giang Song Le ◽  
Oanh Thi Phi Tran
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Saltwater Intrusion ◽  
River System ◽  
Vital Role ◽  
Ho Chi Minh City ◽  
Regulatory Regime ◽  
Water Regulation ◽  
Before And After ◽  
The Impact

SaiGon –DongNai (SG-DN) river system plays a vital role in developing the southern key economic triangle including Ho Chi Minh City, DongNai and BinhDuong provinces. Saltwater intrusion results from many factors and complex movements in SG–DN river system, in the midst of which are sea level rise and water regulation of upstream reservoirs. Theses causes have gradually changed the hydraulic regimes of the river system. As a result, saltwater intrusion has become seriously. In this article, the authors used mathematical models to investigate the change of saltwater boundary of the river system before and after the impact of sea level rise and the regulatory regime of the reservoirs. The findings contributed to the predicted scenarios where sea level rise and salinity boundary could be controlled through the regulation of upstream reservoirs.

scholarly journals Brief communication: The role of using precipitation or river discharge data when assessing global coastal compound flooding

2020 ◽  
Vol 20 (6) ◽  
pp. 1765-1782 ◽  
Author(s):  
Emanuele Bevacqua ◽  
Michalis I. Vousdoukas ◽  
Theodore G. Shepherd ◽  
Mathieu Vrac
Keyword(s):  
River Discharge ◽  
Large Scale ◽  
Storm Surges ◽  
High Water ◽  
Small Rivers ◽  
Water Runoff ◽  
Discharge Data ◽  
Physical Mechanisms ◽  
Catchment Size ◽  
The Impact

Abstract. Interacting storm surges and high water runoff can cause compound flooding (CF) in low-lying coasts and river estuaries. The large-scale CF hazard has been typically studied using proxies such as the concurrence of storm surge extremes either with precipitation or with river discharge extremes. Here the impact of the choice of such proxies is addressed employing state-of-the-art global datasets. Although they are proxies of diverse physical mechanisms, we find that the two approaches show similar CF spatial patterns. On average, deviations are smaller in regions where assessing the actual CF is more relevant, i.e. where the CF potential is high. Differences between the two assessments increase with the catchment size, and our findings indicate that CF in long rivers (catchment ≳5–10×103 km2) should be analysed using river discharge data. The precipitation-based assessment allows for considering local-rainfall-driven CF and CF in small rivers not resolved by large-scale datasets.

scholarly journals Evaluation method of allowable concentration of pollutants considering the state of bottom sediments

2021 ◽  
Vol 958 (1) ◽  
pp. 012017
Author(s):  
D Zhou ◽  
O G Savichev
Keyword(s):  
Chemical Composition ◽  
River Water ◽  
Bottom Sediments ◽  
Evaluation Method ◽  
Solid Particles ◽  
Small Rivers ◽  
Lake Basin ◽  
Water Runoff ◽  
Observation Data ◽  
The Impact

Abstract Considering the dilution of sewage and the interaction between river water and bottom sediments, a mathematical model for the conversion of pollutants in water bodies has been developed. Taking the small rivers in northern Vietnam (Ban Thi River and Dai River in the Red River Basin) as an example, it shows that more than 60% of the chemical composition of the river waters studied is determined by the interaction of the following factors: Co-precipitation of sediments and trace elements on solid particles, and sediments at the bottom of the river. The impact of water runoff is first manifested in the change of solid runoff, and to a lesser extent in the process of regulating the water, which takes longer to establish equilibrium in the solution. On the basis of the proposed model, a simplified version of the model and a standardized pollutant discharge method have been developed for whether there is an option of river water chemical composition observation data. In this case, the influence of interaction with bottom sediments is indirectly considered through the structure of the model and its parameter values. The simplified model was tested with the Jinjiang River in the Poyang Lake Basin as an example.

scholarly journals New Housing Trends in Istanbul

2016 ◽  
Vol 41 (4) ◽  
pp. 89-97 ◽  
Author(s):  
Serpil Özker ◽  
Umut Tuğlu Karsli
Keyword(s):  
Urban Space ◽  
Urban Transformation ◽  
Cultural Changes ◽  
Cultural Aspects ◽  
Cultural Life ◽  
The Social ◽  
New Meanings ◽  
Before And After ◽  
The Impact ◽  
The City

Externalization that became prominent in 1980s with the globalization brought along dramatic changes in social and spatial areas. The social, cultural and economic events that took place on an international level thanks to globalization made the impact of change felt which was reflected on the urban space and, therefore, on the house, resulting in an increase in the importance of the residential sector. Externalization and developed economic structure enabled more investments into houses which introduced a concept of housing populated in urban fringes starting from the city centers. The housing concept which was shaped by the impacts of the urban transformation after 1980 turned into a new emerging lifestyle in Istanbul in 2000s. Accordingly, the study aims to establish the position of housing in Istanbul and new meanings formed by the socio-cultural changes. In this sense, housing before and after 1980, globalization, gentrification, urban transformation, spatial segregation, socio-economic and cultural aspects were discussed based on the structural benchmarks, and 4 different housing forms, namely the “Loft”, “Residence”, “Terraced House”, and “Gated Communities”, with individual structural examples. This study, thus, aims to question the form of tenancy of these houses created through varying concepts and concerns today. The results obtained showed that the housing as an indicator of cultural life in Istanbul has turned into a lifestyle that is shaped by similar aspects and commercial concern, despite different approaches or production forms, eliminating the traces of the cultural life of the society.

scholarly journals Biostability of Tap Water—A Qualitative Analysis of Health Risk in the Example of Groundwater Treatment (Semi-Technical Scale)

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1764 ◽  
Author(s):  
Andżelika Domoń ◽  
Dorota Papciak ◽  
Barbara Tchórzewska-Cieślak ◽  
Katarzyna Pietrucha-Urbanik
Keyword(s):  
Distribution System ◽  
High Efficiency ◽  
Tap Water ◽  
Underground Water ◽  
Biologically Active ◽  
Quality Of Water ◽  
Before And After ◽  
Stability Of Water ◽  
Filter Bed ◽  
The Impact

This article presents results of research which aimed to assess the impact of biofiltration processing on the biological stability of water. Effectiveness of biogenic substances removal (C, N, P) and bacteriological quality of water after the biofiltration process were discussed. The research was carried out on a semi-technical scale on natural underground water rich in organic compounds. A filter with a biologically active carbon (BAC) bed was used for the research. Despite the low water temperature of between 9–12 °C, there was a high efficiency of organic matter removal—33–70%. The number of mesophilic and psychrophilic bacteria in the water before and after the biofiltration process was comparable (0–23 CFU/mL) and met the requirements for drinking water. No E. coli was detected in the water samples. The biological material washed out of the filter bed did not cause deterioration of water quality which proved that the operating parameters of the biofilters were properly chosen, i.e., contact time of 30 min, filtration speed up to 3 m/h. Reduction of the content of nutrients in the treated water limits the risk of microbial growth and thus the emergence of biological growth in the distribution system.

scholarly journals Brief communication: The role of using precipitation or river discharge data when assessing global coastal compound flooding

2020 ◽  
Author(s):  
Emanuele Bevacqua ◽  
Michalis I. Vousdoukas ◽  
Theodore G. Shepherd ◽  
Mathieu Vrac
Keyword(s):  
River Discharge ◽  
Large Scale ◽  
Storm Surges ◽  
High Water ◽  
Small Rivers ◽  
Water Runoff ◽  
Discharge Data ◽  
Physical Mechanisms ◽  
Catchment Size ◽  
The Impact

Abstract. Interacting storm surges and high water-runoff can cause compound flooding (CF) in low-lying coasts and river estuaries. The large-scale CF hazard has been typically studied using proxies such as the concurrence of storm surge extremes either with precipitation or with river discharge extremes. Here the impact of the choice of such proxies is addressed employing state-of-the-art global datasets. Although being proxies of diverse physical mechanisms, we find that the two approaches show similar CF spatial patterns. However, deviations increase with the catchment size and our findings indicate that CF in long rivers (catchment &amp;gtrsim; 5–10 000 Km2) is more accurately analysed using river discharge data. The precipitation-based assessment allows for considering local rainfall-driven CF, and CF in small rivers not resolved by large-scale datasets.

Strategic Role of Zakat in Multidimensional Quality of Life in Sijunjung, Indonesia

2018 ◽  
Vol 15 (1) ◽  
pp. 55-72
Author(s):  
Herlin Hamimi ◽  
Abdul Ghafar Ismail ◽  
Muhammad Hasbi Zaenal
Keyword(s):  
Quality Of Life ◽  
Positive Impact ◽  
Wealth Distribution ◽  
Absolute Poverty ◽  
Before And After ◽  
The Status ◽  
Being There ◽  
The Impact

Zakat is one of the five pillars of Islam which has a function of faith, social and economic functions. Muslims who can pay zakat are required to give at least 2.5 per cent of their wealth. The problem of poverty prevalent in disadvantaged regions because of the difficulty of access to information and communication led to a gap that is so high in wealth and resources. The instrument of zakat provides a paradigm in the achievement of equitable wealth distribution and healthy circulation. Zakat potentially offers a better life and improves the quality of human being. There is a human quality improvement not only in economic terms but also in spiritual terms such as improving religiousity. This study aims to examine the role of zakat to alleviate humanitarian issues in disadvantaged regions such as Sijunjung, one of zakat beneficiaries and impoverished areas in Indonesia. The researcher attempted a Cibest method to capture the impact of zakat beneficiaries before and after becoming a member of Zakat Community Development (ZCD) Program in material and spiritual value. The overall analysis shows that zakat has a positive impact on disadvantaged regions development and enhance the quality of life of the community. There is an improvement in the average of mustahik household incomes after becoming a member of ZCD Program. Cibest model demonstrates that material, spiritual, and absolute poverty index decreased by 10, 5, and 6 per cent. Meanwhile, the welfare index is increased by 21 per cent. These findings have significant implications for developing the quality of life in disadvantaged regions in Sijunjung. Therefore, zakat is one of the instruments to change the status of disadvantaged areas to be equivalent to other areas.

Sign in / Sign up

Export Citation Format

Share Document