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Abstract

Poland is among the countries that are facing water stress, although we largely remain accustomed to having water always there when we need it. Should we take this unrestricted access for granted?

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Authors and Affiliations

Zbigniew M. Karaczun
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Abstract

The results of investigations into suspended matter sedimentation from mine waters in the settling tank at the Ziemowit coal mine as well as in the relevant model of the settling tank were presented. It was shown that variations in the performance of the tank are caused by improperly accumulated sediment, which generates privileged water flow in superficial layers. Additionally, impetuous periodical water discharges seem to be important. The investigations performed on the settling tank model were focused on estimating the influence of temperature, flow rate and the aeration of mine water on the suspended matter sedimentation. Reasons for inefficiency of the settling tank were determined, and technological changes enhancing the process of suspensions removal were suggested.
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Authors and Affiliations

Beata Jabłońska
ORCID: ORCID
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Abstract

The European Water Framework Directive can have enormous consequences for agricul-ture in the Netherlands. In parts of the country agriculture should be taken out of production because the nutrient loads to the surface water system are far too high. This doom scenario is of course unde-sired and a number of source-specific and effect-specific measures are necessary. The fate of nutri-ents in the soil is strongly interrelated with its hydrology. Directly, because nutrients are transported by water and the distribution of the residence time of drainage water is a good measure for the time behaviour of the nutrient loads to the surface water system. Longer residence time in the soil means more of nutrients applied by farmers but also a longer recovery period, after applying source-specific measures. In this paper three promising effect-specific hydrological measures are described buffer strips, retention strips, and controlled drainage.

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Authors and Affiliations

Jan van Bakel
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Abstract

Views on the objectives and role of water management have remarkably changed in the last years. The need of a complex water management that would consider all water users including agriculture and natural environment is often underlined. It is pointed out that agriculture and natural environment (including commercial forests) are basic consumers of precipitation water which is not considered in water and economic balances. More and more importance is attributed to the utilisation of waters from catchment basin and to application of non-technical measures of controlling water cycles. A large impact of agro-ecosystems and natural or semi-natural (forests, wetlands) ecosystems on water balance is underlined. This different approach to the problems of water management is expressed e.g. in Water Framework Directive of European Union devoted to surface and ground water protection. The directive attributes a great role to the protection of aquatic and water related ecosystems. More and more often it is realised that the total water resources are equal to the volume of atmospheric precipitation. Water management should involve not only the water in geological aquifers or river channels but also that which is retained in soil profile. Such elements of water balance as spatial distribution, interception, infiltration and recharge of ground water reservoirs, soil retention capacity, surface runoff and evapotranspiration depend largely on land use in a catchment. Through appropriate land use and catchment management, application of rational agro-technical methods, development of small retention, wetland restoration, and hampering water outflow from draining systems one may significantly affect water cycling in a catchment.

Small water resources of Poland, increasing water consumption, climate changes and requirements of environmental protection enforce the implementation of complex methods of water management and search for environmental-friendly methods of limiting economic losses caused by water deficit or excess. Saving water used for economic purposes and agriculture would permit better fulfilment of the needs of natural environment.

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Authors and Affiliations

Waldemar Mioduszewski
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Abstract

Mine drainage and discharge of salt waters into water bodies belong to main environmental issues, which must be appropriately addressed by the underground coal mining industry. The large area of exploited and abandoned mine fields in the Upper Silesia Coal Basin, as well as the geological structure of the rock mass and its hydrogeological conditions require the draining and discharge of about 119 million m3/yr of mine waters. Increasing the depth of mining and the necessity of protection of mines against water hazard result in increased amounts of chlorides and sulphates in the mine waters, even by decreasing the total coal output and the number of mines. The majority of the salts are being discharged directly into rivers, partly under control of salt concentration, however from the point of the view of environment protection, the most favorable way of their utilization would be technologies allowing the bulk use of saline waters. Filling of underground voids represents a group of such methods, from which the filling of goaves (cavings) is the most effective. Due to large volume of voids resulting from the extraction of coal and taking the numerous limitations of this method into account, the potential capacity for filling reaches about 17.7 million m3/yr of cavings and unnecessary workings. Considering the limited availability of fly ash, which is the main component of slurries being in use for the filling of voids, the total volume of saline water and brines, which could be utilized, has been assessed as 3,5–6,5 million m3/yr

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Authors and Affiliations

Grzegorz Strozik
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Abstract

The Netherlands has a long tradition in water management, mainly stemming from the geography of the country. The ‘struggle with water’ has been organised from medieval times by the water boards (waterschappen), which are the oldest democratic institutions in the Netherlands. Nowa-days the water boards, 27 in the whole of the Netherlands, are not only responsible for flood protec-tion and regulation of water levels, but for water quality management and waste water treatment as well. In the years in which the WFD implementation has been underway in the Netherlands, several issues have arisen. Cooperation between all levels of government is key. This requires as clear as possible divisions of competences between the various parties involved. It also takes much time, es-pecially in a process in which many matters have to be invented ‘on the fly’, such as criteria for des-ignating water bodies, ecological standards, and the formulation of MEP and GEP.

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Authors and Affiliations

Thomas Ietswaart
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Abstract

Analysis of the national and regional plans shows that the current year, 2006, shall deter-mine the key lines of national and regional development practically till 2015, that means till the time when, under the Water Framework Directive, Poland should have achieved its major objectives. This year shall witness decision making not only on the key objectives, priority strategies and measures undertaken for social and economic development of the country and regions, but also allocation of the main streams of funds from the EU and public funds from national sources. This is a sort of chal-lenge for administration bodies responsible for water management, particularly in respect of pro-gramming water management tasks and their incorporation into documents which are strategic for development on national and regional level. Over 2006–2008 efforts of water management admini-stration bodies should be focused on incorporation of water management issues into the consecutive edition of the National Ecological Policy and environmental protection programmes – at regional level, to be followed by county and community levels. This paper is a part of the broad stream of methodology and pilot work on the implementation of provisions of the Water Framework Directive in Poland. The main body of the paper consists of the summary of work done for the pilot river basin of Upper Narew.

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Authors and Affiliations

Dorota Pusłowska-Tyszewska
Janusz Kindler
Sylwester Tyszewski
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Abstract

Polish water resources depend on precipitations, which are variable in time and space. In dry years the water balance is negative in central parts of Poland but sudden thaws and downfalls may result in periodical water excess and dangerous floods almost in the entire country. The retention capacity of artificial reservoirs in Poland permits to store only 6% of the average annual runoff, which is commonly considered insufficient. Another method to increase retention is soil water con-trol. About fifty percent of soils in Poland consist of light and very light sandy soils with low water capacity. Loams and organogenic soils cover approximately 25% and 8.5% area of the country, re-spectively. Almost half of agricultural lands (48%) have relatively good water conditions, but the rest requires soil water control measures. An increase of the soil water content could be achieved by changes of soil properties, water table control and soil water management. Modernization and recon-struction of drainage and irrigation systems, which were built mainly in the period 1960–1980, is needed.

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Authors and Affiliations

Edward Pierzgalski
Jerzy Jeznach
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Abstract

Irrigation in Croatia was until recently a neglected measure in food production, especially in continental part of the country. Development of drainage system in the last fifty years was more important due to the problems caused by floods and excess water in the fields. In the last decade the hydrological regime has been changed and drought events became as frequent as flood events, causing even more damage. Future development of agriculture in the northern counties of Croatia depends on the introduction of new, profitable crops which imply irrigation as an essential factor of future social and economic growth.

The first step in the implementation of irrigation was the development of National Irrigation Master

Plan as a framework for future activities.

According to the recommendations of the National Master Plan all counties have created County Irrigation Plans considering local natural conditions, social and economic background.

This paper is going to present how is that process of integrated water resources management developing in the continental part of Croatia on the example of Osijek County Irrigation Plan located in the Danube river basin.

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Authors and Affiliations

Lidija Tadić
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Abstract

Iraq has been suffering from decreasing Euphrates discharge due to the construction of dams within upstream countries and the use of surface irrigation systems. The country is facing a problem with meeting the increasing demand for water as a result of population growth and development in the industrial and agricultural sectors. Therefore, a simulation modelling was applied for western Iraq (Ramadi city as a case study) using the Water Evaluation and Planning System (WEAP) for the period 2018–2035. This research follows a four-step approach that involves: (i) evaluating the available water of the Euphrates River under declined water imports caused by the construction of dams in Turkey and Syria, (ii) assessing present and future water demands of the domestic, industrial, and agricultural sectors, (iii) improving water productivity (WP) by means of saving more water, (iv) estimating the economic returns under improved water use. The results showed that Iraq would face a serious problem in the coming years, represented by the limited storage of Haditha Dam, which is considered the strategic water storage site for the central and southern regions of Iraq. The study indicated the necessity of finding alternative sources of water supply by adopting new water management strategies to reduce the water deficit.
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Authors and Affiliations

Isam Mohammed Abdulhameed
1
ORCID: ORCID
Sadeq Oleiwi Sulaiman
2
ORCID: ORCID
Abu Baker Ahmed Najm
2
ORCID: ORCID
Nadhir Al-Ansari
3
ORCID: ORCID

  1. University of Anbar, College of Engineering, Upper Euphrates Basin Developing Centre, Ramadi, Iraq
  2. University of Anbar, College of Engineering, Dams and Water Resources Department, Ramadi, Iraq
  3. Lulea University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Porsön, 97187 Lulea, Sweden
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Abstract

This study aimed to indicate the variability range of parameter values describing the geomechanical properties of Carboniferous rocks depending on the moisture content of the laboratory sample. We assumed that the moisture content in the tested rock samples corresponds to various water saturation states in the rock mass. The states could be caused by complete and long-term drainage, water inflow, or the position of the rock sample to the ventilation ducts or the water table in flooded mine workings. In line with this assumption, measurements were made on samples of accompanying rock using two water saturation states of rock pores – moisture of samples, i.e., air-dried and capillary saturation states. Laboratory surveys were also made for the state of moisture of the coals obtained in the process of immersion of the sample in water. The air-dried state of rocks as standard in geomechanical tests in laboratories was compared with the surroundings of mining excavations, mostly ventilated ones, located within a long-term preserved depression cone, especially in hydrogeological covered areas. We used the capillary saturation state to demonstrate significant changes in the values of basic geomechanical parameters under the influence of the water from the surface and higher aquifers, circulating in the rock mass near groundwater reservoirs. Capillary saturation was the closest to natural moisture in the rock mass drained from free water. The coefficient of changes in the geomechanical properties of rocks associated with the change in moisture content and the transition of rocks from the air-dried state to the capillary saturation state was determined. The parameter was suitable for simulating probable changes in the values of geomechanical parameters of rocks and approximating the laboratory moisture content to the conditions occurring in the rock mass. Linear relationships were also developed with very good or good, and sometimes satisfactory coefficient determinations.
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Authors and Affiliations

Mirosława Bukowska
1
ORCID: ORCID
Przemysław Bukowski
1
ORCID: ORCID

  1. GIG Research Institute, 1 Gwarków Sq., 40-166 Katowice, Poland
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Abstract

In this article we pay attention to some theoretical backgrounds for the redesign of nineteenth-century public parks in Central and Eastern Europe. The research is part of a larger project ‘The design history of nineteenth-century public parks in Central and Eastern Europe; contemporary use and future development’ (HYPPE), initiated by the Faculty of Landscape Architecture and Urbanism in Budapest, in which nine schools of landscape architecture in nine different countries in Central and Eastern Europe participate and collaborate.

We will focus here on some theoretical backgrounds, that form the foundation for a research and design approach, in which the diversity and similarity of the sites, contexts and design problems can be assured. Product (plan and realisation) and process (design) play a role in the parks as object of planning and design; on the one hand we distinguish between land, landscape and landscape architecture, on the other one — at the same time the difference in approaches between science and design play a role in the relation between research and design.

In the second part backgrounds and principles, that underpin the relation between conservation and development in historical settings of parks are dealt with. Different design approaches — from restoration to complete reconstruction are highlighted. Applying these principles to nineteenth-century public parks in Central and Eastern Europe shows, where generic backgrounds and specifics of site, history and culture meet.

In the third part the new challenges for landscape architecture, that society requires from contemporary planning and design is elaborated. Energy transition, water management and the creation of healthy environments for people are as such not new for landscape architecture, but in this stage new steps have to be taken, that reach beyond, what is already practised. Here the explorative and experimental character of the design approach comes to the surface because for these aspects there are no precedents yet, they have to be developed by practice, research on evidence and imagining solutions, that are beyond the usual practice of energy transition, water management and the creation of healthy environments for people. For landscape architecture a synthetical and coherent design concept forms the core of the contribution; the search for a meaningful new order.

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Authors and Affiliations

Albert Fekete
ORCID: ORCID
Martin Van Den Toorn
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Abstract

Artificial water reservoirs pose impact on the natural environment. Impact of the artificial Czorsztyn Lake on groundwater and land management is assessed. The study is based on long-term observations of chemistry, groundwater levels and spring discharges during reservoir construction, filling, and 25-year-long exploitation. Land management changes caused by reservoir construction were recognized using remote sensing. Reservoir construction resulted in land management change in the study area. Built-up and forest areas gained prevalence over farmland areas. Two types of groundwater dominate: HCO3–Ca and HCO3–Ca–Mg, both before reservoir filling (68% analyses) and afterwards (95% analyses), and in control analyses from September 2020 (100% analyses). Gradual decrease in the occurrence of water types with the sulphate ion exceeding 20% mvals is documented, which points to water quality improvement trends. Moreover, changes of water saturation index values with regard to aquifer-forming mineral phases during reservoir construction and early exploitation phasei ndicate hydrochemical modifications. Decrease of groundwater level was related with transformation of the Dunajec river valley during reservoir construction and, accordingly, decrease of regional drainage base level. Groundwater level increased after reservoir filling, which points to coupled impact of the reservoir and increased precipitation recharge. Construction of the Czorsztyn Lake resulted in gradual land management transformation from farmlands into tourist-recreational areas. This change and river valley flooding by surface waters did not cause significant modifications in groundwater quantity and quality. Organization of water-sewage management related with reservoir construction resulted in noticeably improved quality trends.
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Authors and Affiliations

Włodzimierz Humnicki
1
ORCID: ORCID
Ewa Krogulec
1
Jerzy Małecki
1
ORCID: ORCID
Marzena Szostakiewicz-Hołownia
1
ORCID: ORCID
Anna Wojdalska
1
Daniel Zaszewski
1
ORCID: ORCID

  1. Faculty of Geology, University of Warsaw, Poland
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Abstract

Two-third of the area of the Netherlands is flood prone. Storm surges at the North Sea, floods in the rivers, failure of secondary dikes, as well as heavy rainfall may cause flooding. Most of the flood prone areas rely for their existence on drainage by pumping, because their surface level may be permanently or during floods up to several metres below the surrounding water levels. During the past decades climate change is generally felt as a reason for major concern. However, the impacts of climate change on increase in extreme conditions may be up to 45% per century. If we look at the man-induced changes in land use, due to increase in population and rapid increase in the value of public and private property, then one may observe an increase of 100–1,000% per century. One should therefore wonder what would have to be our major concern.

In the paper the relevant processes are described, based on some characteristic data on water management and flood protection in the Netherlands. It is shown that impacts of climate change on water management and flood protection may be expected, but that such impacts can easily be accommodated during improvement works on water management systems and flood protection provisions that from time to time will be required. It will be much more important to take carefully into account the risk of flooding in the planning of land use development, especially for valuable types of land use like urban and industrial areas, green houses and recreation areas.

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Authors and Affiliations

Bart Schultz
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Abstract

In order to maintain and improve water quality, man has an increasing need to understand the relations among basin land use and in stream water quality. Being concerned about quality and quantity status of European waters European Union has adopted Water Framework Directive (2000/60/EU). The process of pressure and impact analyses and water status assessment is termed, in short, as “first characterisation” of water bodies. In accordance to WFD programmes of measures have to be developed by 2009. In WFD programmes existing measures for water protection directed by other EU directives such are Nitrate, Urban Waste Water, Dangerous Substances and IPPC will be further developed and new added. In the paper, we describe the first characterisation of the Slovene waters and show cross compliance of the Nitrate and Water Framework Directives in Slovenia

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Authors and Affiliations

Marina Pintar
Lidija Globevnik
Urška Bremec
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Abstract

The article is devoted to the actual scientific and practical problem of improving methodological and methodical ap-proaches to the evaluation of design solutions in the water management and land reclamation industry based on the ecolog-ical and economic principles in conditions of uncertainty. The current stage of the development of the water management sector in Ukraine is characterized by a combination of past negligence and the present energy, food and water crises, as well as global climate change. To solve these problems, it is necessary to reform organizational-economic relations in the industry, including new sources and forms of financing for water management and land reclamation projects, introduction of new environmentally advanced technologies, and the im-provement of the existing ecological and economic evaluation of investments. Based on scientific and methodological recommendations used for evaluating the effectiveness of investment in vari-ous spheres of economic activity, the authors developed and implemented an improved methodology for the evaluation of water management and land reclamation projects. It is based on methodological approaches that cover such elements as the variety of options, changes in the value of money over time, specific project implementation environment, including the impact of weather, climate and environmental factors on project performance, multilevel and gradual evaluation of a pro-ject against specific criteria and according to stages of the project cycle. The method was tested during the reconstruction of a rice irrigation system in the steppe zone of about 3000 ha in Ukraine. Economic results, namely the deterministic payback period and investment return index confirm that the proposed mechanism, unlike the traditional one, increases the economic and environmental feasibility of water management and land reclamation projects. Therefore, it stimulates investment in the land reclamation sector.
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Authors and Affiliations

Pyotr Kovalenko
1
ORCID: ORCID
Anatoliy Rokochinskiy
2
ORCID: ORCID
Pavlo Volk
2
ORCID: ORCID
Vasyl Turcheniuk
2
ORCID: ORCID
Nadia Frolenkova
2
ORCID: ORCID
Ruslan Tykhenko
3
ORCID: ORCID

  1. Institute of Water Problems and Land Reclamation of NAAS of Ukraine, Chapaeva Str., 14, fl. 6, 01030, Kyiv, Ukraine
  2. National University of Water and Environmental Engineering, Rivne, Ukraine
  3. National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine
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Abstract

Baseflow is the primary source of water for irrigation and other water needs during prolonged dry periods; accurate and rapid estimation of baseflow is therefore crucial for water resource allocation. This research aims to estimate baseflow contribution during dry periods in three small watersheds in East Java: Surabaya-Perning (114 km2), Lamong-Simoanggrok (235 km2), and Bangsal-Kedunguneng (26 km2). Six recursive digital filters (RDFs) algorithms are explored using a procedure consisting of calibration, validation, evaluation and interpretation. In this study, the period of July to September is considered as the peak of the dry season. Moreover, data for the period 1996 to 2005 is used to calibrate the algorithms. By yearly averaging, values are obtained for the parameters and then used to test performance during the validation period from 2006 to 2015. Statistical analysis, flow duration curves and hydrographs are used to evaluate and compare the performance of each algorithm. The results show that all the filters explored can be applied to estimate baseflow in the region. However, the Lyne–Hollick (with RMSE = 0.022, 0.125, 0.010 and R2 = 0.951, 0.968, 0.712) and exponentially weighted moving average or EWMA (with RMSE = 0.022, 0.124, 0.009 and R2 = 0.957, 0.968, 0.891) for the three sub-watersheds versions give the best performance.
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Authors and Affiliations

Indarto Indarto
1
ORCID: ORCID
Mujiono Hardiansyah
1
Mohamad Wawan Sujarwo
1
ORCID: ORCID

  1. University of Jember, Faculty of Agricultural Technology, Jl kalimantan No. 37 Kampus Tegalboto, 68121, Jember, Jawa Timur, Indonesia
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Abstract

Changes in river channel morphological parameters are influenced by anthropogenic factors, such as climatic changes, river catchment management changes, and hydrotechnical development of rivers. To assess the intensity of individual pressures and the resulting changes in abiotic and biotic factors in the riverbed, water quality monitoring is conducted, including the assessment of the hydromorphological status. The assessment can be based on the River Habitat Survey (RHS) which is a synthetic method that includes the evaluation of habitat character and river quality based on their morphological structure.
The input data, which characterise any river include physical features of hydrotechnical structures, bed granulation, occurrence of bedforms, visible morphodynamic phenomena, and a sediment transport pattern. The RHS method allows to determine two quantitative indices used to evaluate the hydromorphological status: Habitat Modification Score ( HMS), which determines the extent of transformation in the morphology of a watercourse, and Habitat Quality Assessment ( HQA), which is based on the presence and diversity of natural elements in a watercourse and river valley.
The proposed method can be divided into three stages. The first assesses the river section hydromorphological indices, describing the degree of technical modification ( HMS) and the ecological quality of the reach ( HQA), using the RHS method. The second stage describes morphological changes resulting from the technical regulation and estimates indices for the regulated reach. Finally, we compare HQA and HMS indices before and after the regulation. This comparison is described by numerical indicators and related to reference values.
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Authors and Affiliations

Marta J. Kiraga
1
ORCID: ORCID
Anna Markiewicz
1
ORCID: ORCID

  1. Warsaw University of Life Sciences, Institute of Civil Engineering, Faculty of Civil and Environmental Engineering, Department of Hydrotechnics, Technology and Management, Nowoursynowska St 159, 02-776 Warsaw, Poland
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Abstract

Access to clean and sufficient drinking water is difficult in much of Ethiopia’s Afar Region. It is observed that many schemes in the region are non-functional. The study was conducted to overcome the observed problem in seven selected districts of the region. The study regarded hand-dug wells and roof water collection systems, which are the two most common features in the research areas. Eight hand-dug wells and sixteen roof water harvestings are purposively included in the study. All the water points are constructed by Kelem Ethiopia which is a non-governmental organisation and the foremost local organisation for the communities. As per the research survey, the average functional status of the hand-dug well schemes is 65.75% and the roof water harvesting schemes is 22.94%. The research was based on the qualitative data collected on site. The hand-dug well sites were evaluated using 10 parameters, and the roof water harvesting schemes were analysed using 12 parameters. The main non-functional aspects of the scheme are lack of community ownership, drying up of water sources, lack of maintenance and rehabilitation, poor coordination of beneficiaries and school roofs blowing off. Most schemes still require minor to major maintenance and rehabilitation. According to the research, the solutions for water supply are identified in relation to the desired objective.
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Authors and Affiliations

Melese C. Shumie
1

  1. Debre Berhan University, Department of Civil Engineering, Debre Berhan, PO Box 445, Ethiopia
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Abstract

Ballast water is a significant vector for the transport and introduction of aquatic organisms, microorganisms and chemical pollutants which impacts on ecosystems worldwide. In the study, ballast water from short- and long- range vessels with treatment systems was microbiologically evaluated in spring (April 20th) and summer (July 19th) and compared with waters of the main Police Seaport in the Odra River Estuary, southern Baltic Sea. All collected samples were evaluated for their physicochemical properties by standard methods. The number of individual groups of microorganisms was determined using the indirect culture method, according to the technique of inoculation of serial dilutions of samples of the examined waters. The results showed differences in the microorganisms in analysed samples. The phylogenetic analysis of bacteria recorded from the ballast water of short-range ships in spring showed the presence of six species of the genus Bordetella, while in summer four species of the genus Clostridium. In the ballast water of long-range ships, proteolytic bacteria pre-dominated in spring and halophilic bacteria in summer. In the summer period, eight species of bacteria were recorded, of which six belonged to the genus Clostridium. The ballast water treatment processes used on ships influence the composition of bacterial communities through selective recolonisation of water, which may transform bacterial functions as an important element of the marine food web. On the other hand, the presence of pathogenic bacterial species in the tested samples indicates improvement necessity of ballast water treatment systems used on vessels.
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Authors and Affiliations

Kinga Zatoń-Sieczka
1 2
ORCID: ORCID
Magdalena Błaszak
2
ORCID: ORCID
Marta Buśko
3
ORCID: ORCID
Przemysław Czerniejewski
1
ORCID: ORCID

  1. Westpomeranian University of Technology in Szczecin, Department of Commodity, Quality Assessment, Process Engineering and Human Nutrition, Kazimierza Królewicza 4 St., 71-550 Szczecin, Poland
  2. Westpomeranian University of Technology in Szczecin, Department of Bioengineering, Laboratory of Microbiology and Environmental Biochemistry, Słowackiego 17 St., 71-434 Szczecin, Poland
  3. Westpomeranian University of Technology in Szczecin, Department of Bioengineering, Laboratory of General Chemistry and Environmental Analysis, Szczecin, Poland
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Abstract

Several conjunctive use approaches can be distinguished. Drought cycling of groundwater (GW) usage and storage relies on more surface water (SW) during wetter years and delivers more water from GW during drought years. This method has the benefit of temporal changes in water availability. Additionally, it is usually desirable in areas with internal variability of SW where surface storage of wet-year surpluses is uneconomical, suffer excessive evaporative losses, or cause unacceptable environmental disruption. In previous studies, the purpose of operating the drought cycling was to reduce operating costs. In these studies, the objective function of the proposed model was to minimise the present value cost derived from the system design and operation to satisfy a predefined demand during a finite planning and operation horizon. However, it is important to consider other objectives in operating water resources systems, including minimising water shortages accurately. Hence, in this study, two scenarios were focused on: 1) mi-nimising water shortagages, 2) minimising operational costs. Pareto solutions are then presented with the objectives of minimising costs and water deficit. In this study, the weighting method has been used to extract Pareto options. The results show that reducing costs from 234 to 100 mln USD will increase water shortage from 9.3 to 11.3 mln m3.
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Authors and Affiliations

Tzu-Chia Chen
1
ORCID: ORCID
Tsung-Shun Hsieh
2
Rustem A. Shichiyakh
3
ORCID: ORCID

  1. Dhurakij Pundit University, Bangkok, Thailand
  2. Krirk University, Thanon Ram Intra, Khwaeng Anusawari, Khet Bang Khen, Krung Thep Maha Nakhon 10220, Thailand
  3. Kuban State Agrarian University named after I.T. Trubilin, Department of Management, Krasnodar, Russian Federation

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