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Publications (10 of 109) Show all publications
Alzeyadi, A., Al-Ansari, N., Al-Rawabdeh, A. M. & Laue, J. (2019). A Novel Coating Method for Create Filter Media Capable to Remove Phosphate from Wastewater Effectively. Engineering, 11(8), 443-463
Open this publication in new window or tab >>A Novel Coating Method for Create Filter Media Capable to Remove Phosphate from Wastewater Effectively
2019 (English)In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 11, no 8, p. 443-463Article in journal (Refereed) Published
Abstract [en]

Filtration materials coating with metallic oxides represented a good method for phosphate sorption. However, most of the researchers utilize chemicals as a source of metallic oxides and heating process to set the chemicals over the filtration materials. This study is aimed to introduce the furnace bottom ash FBA as a source of metallic oxides; it is available free because it is dumped as a waste material from power generation plants. The method of creating new filter media involves coating the limestone and sand by FBA, and the ordinary Portland cement OPC utilized as binder to binding the mixture materials. The water is the factor which is responsible for activating the OPC. All factors such as mixed materials ratio, water content and age of reaction have subjected to optimization process. The results revealed that the optimal mixture for phosphate removal consists of 40% FBA, 5% OPC from dry weight of supporting material, 35% water ratio from the total weight of FBA and OPC, and 14 days are enough to complete the materials reaction. Limestone-furnace bottom ash LFBA indicated high capacity for phosphate sorption and possibility  of  efficiency  regenerate.  This  study  demonstrates  a  new  method  for coating the filtration materials more convenient with sustainability approach.

Place, publisher, year, edition, pages
Scientific Research Publishing, 2019
Keywords
Calcium-Silicate Hydrates, FBA, Metal Oxides, Sorption, Upflow Filter, Wastewater Treatment
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-75647 (URN)10.4236/eng.2019.118032 (DOI)
Available from: 2019-08-21 Created: 2019-08-21 Last updated: 2019-08-27Bibliographically approved
Meng, J., Huang, J., Lin, H., Laue, J. & Li, K. (2019). A static discrete element method with discontinuous deformation analysis. International Journal for Numerical Methods in Engineering
Open this publication in new window or tab >>A static discrete element method with discontinuous deformation analysis
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2019 (English)In: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207Article in journal (Refereed) Epub ahead of print
Abstract [en]

For discrete element methods (DEMs), integrating the equation of motion based on Newton's second law is an integral part of the computation. Accelerations and velocities are involved even for modeling static mechanics problems. As a consequence, the accuracy can be ruined and numerous calculation steps are required to converge. In this study, we propose a static DEM based on discontinuous deformation analysis (DDA). The force of inertia is removed to develop a set of static equilibrium equations for distinct blocks. It inherits the advantages of DDA in dealing with distinct block system such as jointed rock structures. Furthermore, the critical numerical artifact in DDA, ie, artificial springs between contact blocks, is avoided. Accurate numerical solution can be achieved in mere one calculation step. Last but not the least, since the method is formulated in the framework of mathematical programming, the implementation can be easily conducted with standard and readily available solvers. Its accuracy and efficiency are verified against a series of benchmarks found in the literature.

Place, publisher, year, edition, pages
John Wiley & Sons, 2019
Keywords
contact problems, discontinuous deformation analysis, discrete element method, mathematical programming, static DEM
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-75594 (URN)10.1002/nme.6164 (DOI)000478945800001 ()
Available from: 2019-08-20 Created: 2019-08-20 Last updated: 2019-08-20
Adamo, N., Al-Ansari, N., Sissakian, V., Laue, J. & Knutsson, S. (2019). Badush Dam: A Unique Case of Flood WaveRetention Dams Uncertain Future and Problematic Geology. Engineering, 11(4), 189-205
Open this publication in new window or tab >>Badush Dam: A Unique Case of Flood WaveRetention Dams Uncertain Future and Problematic Geology
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2019 (English)In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 11, no 4, p. 189-205Article in journal (Refereed) Published
Abstract [en]

Badush Dam is a partially completed dam and a unique case of flood reten- tion dams. Its intended main function is to perform flood protection once in its lifetime; that is if Mosul Dam would collapse. In such a case, the Badush dam would temporarily store the whole flood wave and route it safely to the downstream. For this end, the bulk of the reservoir is left dry, while the re- maining  volume  at  the  lower  part  which  is  intended  for  power  eneration does  not  give  an  economic  justification  for  building  the  full  height  of  the dam. The short duration of the intended use as a protection dam has led to relaxing many design assumptions which have raised concerns over the dam integrity.  The  current  controversy  rages  now  over  whether  to  continue  the construction of the dam as it was first designed or to change all that in view of the similar site geology of Mosul Dam. Mosul dam foundations suffer at the moment from the severe continuous dissolution of the soluble materials in its foundation  leading  to  continued  maintenance  grouting  of  that  foundation. This paper gives an overview of the history of Badush dam, its current design and what new equirements which are needed if it is to replace Mosul Damitself.

Place, publisher, year, edition, pages
USA: Scientific Research Publishing, 2019
Keywords
Badush Dam, Mosul Dam, Flood Retention Dam Dry Dam, Foundation
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-73608 (URN)10.4236/eng.2019.114014 (DOI)
Available from: 2019-04-12 Created: 2019-04-12 Last updated: 2019-04-15Bibliographically approved
Alkaradaghi, K., Ali, S. S., Al-Ansari, N., Laue, J. & Chabuk, A. (2019). Landfill Site Selection Using MCDM Methods and GIS in the Sulaimaniyah Governorate, Iraq. Sustainability, 11(17), Article ID 4530.
Open this publication in new window or tab >>Landfill Site Selection Using MCDM Methods and GIS in the Sulaimaniyah Governorate, Iraq
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2019 (English)In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 11, no 17, article id 4530Article in journal (Refereed) Published
Abstract [en]

A shortage of land for waste disposal is one of the serious problems that faces urban areas in developing countries. The Sulaimaniyah Governorate, located in the north of Iraq, is one of the major cities in the Kurdistan Region of the country, covering an area of 2400 km2 with a population of 856,990 in 2016. Currently, there is no landfill site in the study area that meets scientific and environmental criteria, and inappropriate solid waste dumping is causing negative environmental impacts. The process of landfill site selection is considered a complex process and is restricted by numerous factors and regulations. This paper proposes multi-criteria decision-making (MCDM) methods in a model for landfill site decision. The model assumes the input of two groups of factors that need to satisfy the optimal values of weight coefficients. These groups of constants are natural factors and artificial factors, and they included thirteen selected criteria: slope, geology, land use, urban area, villages, rivers, groundwater, slope, elevation, soil, geology, road, oil and gas, land use, archaeology and power lines. The criteria were used in the geographic information system (GIS), which has a high capacity to process and analyze various data. In addition, multi-criteria decision-making (MCDM) methods followed by the weighted linear combination (WLC) method were used to derive criteria weightings using a matrix of pair-wise comparison. Finally, all the multi criteria decision methods were combined to obtain an intersection of the suitability index map for candidate landfill sites. Seven appropriate sites for landfill were suggested, all of which satisfied the scientific and environmental criteria which were adopted in this study.

Place, publisher, year, edition, pages
MDPI, 2019
Keywords
landfill site, GIS software, MCDM methods, criteria weights, suitability index
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-75666 (URN)10.3390/su11174530 (DOI)2-s2.0-85071983992 (Scopus ID)
Note

Validerad;2019;Nivå 2;2019-08-27 (johcin)

Available from: 2019-08-22 Created: 2019-08-22 Last updated: 2019-09-18Bibliographically approved
Chabuk, A., Al-Ansari, N., Hussain, H. M., Laue, J., Hazim, A., Knutsson, S. & Pusch, R. (2019). Landfill Sites Selection Using MCDM and Comparing Method of Change Detection for Babylon Governorate, Iraq. Environmental science and pollution research international
Open this publication in new window or tab >>Landfill Sites Selection Using MCDM and Comparing Method of Change Detection for Babylon Governorate, Iraq
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2019 (English)In: Environmental science and pollution research international, ISSN 0944-1344, E-ISSN 1614-7499Article in journal (Refereed) Epub ahead of print
Abstract [en]

Landfill site`s selection represents a complicated process due to the large number of variables to be adopted. In this study, an arid area (Babylon Governorate as a case study) was selected. It is located in the middle region of Iraq. In this area, the  landfills do not satisfy the required  international criteria.  Fifteen  of the  most significant criterion were selected for this purpose. For suitable weight for each criterion, the multi criteria decision making (MCDM) methods were applied. These methods are AHP and RSW. In the GIS software 10.5, the raster maps of the chosen criterion were arranged and analysed. The method of change detection was implemented to determine the matching pixels and non-matching pixels. The final results showed that there are two candidate locations for landfills for each district in the governorate (ten sites). The areas of the selected sites were sufficient to contain the cumulative quantity of solid waste from 2020 until 2030.

Place, publisher, year, edition, pages
Springer Publishing Company, 2019
Keywords
MCDM, Change Detection, RSW, AHP, Landfill siting
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-73400 (URN)10.1007/s11356-019-05064-7 (DOI)31044377 (PubMedID)2-s2.0-85065255296 (Scopus ID)
Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-06-25Bibliographically approved
Adamo, N., Al-Ansari, N., Sissakian, V., Laue, J. & Knutsson, S. (2019). Mosul Dam: Geology and Safety Concerns. Journal of Civil Engineering and Architecture, 13(3), 151-177
Open this publication in new window or tab >>Mosul Dam: Geology and Safety Concerns
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2019 (English)In: Journal of Civil Engineering and Architecture, ISSN 1934-7359, E-ISSN 1934-7367, Vol. 13, no 3, p. 151-177Article in journal (Refereed) Published
Abstract [en]

Mosul Dam is an earth fill dam located on the River Tigris northern part of Iraq. The capacity of its reservoir is 11.11 billion cubic meters which makes it the fourth biggest dam in the Middle East. From geological perspective, the dam is located on double plunging anticlines. The rocks of the site are mainly composed of highly jointed and karistified alternating beds of limestones, gysum and marls, since the impoundment of the reservoir seepage of water was recognized under the foundation of the dam. To stop or minimize the seepage, intensive grouting operations were conducted. Recent investigations and evaluation of the conditions of the dam indicate that it is in a critical situation. In this paper, consequences of the dam failure are discussed and possible solutions are given.

Place, publisher, year, edition, pages
USA: David Publishing Company, 2019
Keywords
Mosul Dam, karst, infiltration, dam foundation, dam failure.
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-73526 (URN)10.17265/1934-7359/2019.03.001 (DOI)
Note

Validerad;2019;Nivå 2;2019-04-15 (oliekm)

Available from: 2019-04-09 Created: 2019-04-09 Last updated: 2019-04-15Bibliographically approved
Taeseri, D., Laue, J. & Anastasopoulos, I. (2019). Non-linear rocking stiffness of embedded foundations in sand. Geotechnique, 69(9), 767-782
Open this publication in new window or tab >>Non-linear rocking stiffness of embedded foundations in sand
2019 (English)In: Geotechnique, ISSN 0016-8505, E-ISSN 1751-7656, Vol. 69, no 9, p. 767-782Article in journal (Refereed) Published
Abstract [en]

The rocking response of embedded foundations in sand is studied, combining centrifuge modelling and numerical analysis. In total, 51 centrifuge model tests are conducted at ETH Zurich, varying the embedment ratio D/B and the factor of safety against vertical loading (bearing capacity), Fs. The experimental results are used to validate three-dimensional finite-element models, which are subsequently employed for a parametric study. The initial two phases of non-linear response are studied, namely quasi-elastic and non-linear response, while the third phase (plastic response) will be examined in a forthcoming publication. Regarding small-strain rocking stiffness, Kr (first phase), an extended formula is proposed, accounting for soil inhomogeneity along the embedded sidewalls. Kr is shown to decrease with Fs, due to initial soil yielding from vertical loading. The formula is further extended to account for the role of Fs, offering improved estimation of small-strain rocking stiffness. With respect to the non-linear response (second phase), it is shown that the degradation curves of rocking stiffness with rotation can become approximately dimensionless, if the rotation θ is normalised to a characteristic rotation, θs. The increase of D/B leads to a reduction of the normalised rotation θ/θs at which the non-linear response is initiated, due to the increasing participation of sidewall friction.

Place, publisher, year, edition, pages
ICE Publishing, 2019
Keywords
centrifuge modelling, dynamics, earthquakes, numerical modelling, soil/structure interaction, stiffness
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-75766 (URN)10.1680/jgeot.17.P.201 (DOI)000480675700002 ()2-s2.0-85070779815 (Scopus ID)
Note

Validerad;2019;Nivå 2;2019-08-29 (johcin)

Available from: 2019-08-29 Created: 2019-08-29 Last updated: 2019-08-29Bibliographically approved
Al-Madhlom, Q., Nordell, B., Chabuk, A., Al-Ansari, N., Lindblom, J., Laue, J. & Hussain, H. M. (2019). Potential use of UTES in Babylon Governorate, Iraq. Groundwater for Sustainable Development
Open this publication in new window or tab >>Potential use of UTES in Babylon Governorate, Iraq
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2019 (English)In: Groundwater for Sustainable Development, ISSN 2352-801XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

There is a global attention that the future energy systems will be based on renewable energy like solar and wind. The large-scale utilization of renewables in space heating and cooling requires large Thermal Energy Storage TES to overcome the varying supply and demand. The process of producing the best Underground Thermal Energy Storage UTES system pass through two steps: first, finding the best type of UTES system, second, finding the best locations to install UTES system. Both of these two steps depend extremely on the site specific parameters such that the depth to the groundwater, transmissivity, type of soil, the depth to the bedrock, and seepage velocity. The purpose of this paper is to explain some of the site specific parameters that the type of UTES-system depends on and explain the suitable type of UTES systems. This study considers Babylon province (Iraq) as study area. This province has electricity deficiency due to Heating Ventilating and Air Conditioning HVAC applications. The methodology of this study includes reviewing the literature that consider the study area, and using Arc Map/GIS to visualize some of the in-site parameters. The results indicate that the best type of UTES system for the considered region is either aquifer or pit type, due to the type of the soil and the depth to the crystalline bedrock. The hydraulic conductivity and the seepage velocity in the considered region are (0.0023–2.5) m/d and (1.3 × 10−6 – 3.45 × 10−3) m/d respectively. These conditions satisfy the standards which regard aquifer type.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Renewable energy, Groundwater, Aquifer thermal energy storage, Pit thermal energy storage
National Category
Geotechnical Engineering Water Engineering
Research subject
Soil Mechanics; Soil Mechanics; Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-76206 (URN)10.1016/j.gsd.2019.100283 (DOI)
Available from: 2019-10-02 Created: 2019-10-02 Last updated: 2019-10-02
Al-Madhlom, Q., Hamza, B., Al-Ansari, N., Laue, J., Nordell, B. & Hussain, H. M. (2019). Site Selection Criteria of UTES Systems in Hot Climate. In: Proceedings of the XVII ECSMGE-2019: Geotechnical Engineering foundation of the future. Paper presented at XVII European Conference on Soil Mechanics and Geotechnical Engineering,(ECSMGE), 2019, 1 - 6 September 2019, Reykjavik, Iceland (pp. 1-8). Iceland: The Icelandic Geotechnical Society (IGS), 1
Open this publication in new window or tab >>Site Selection Criteria of UTES Systems in Hot Climate
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2019 (English)In: Proceedings of the XVII ECSMGE-2019: Geotechnical Engineering foundation of the future, Iceland: The Icelandic Geotechnical Society (IGS) , 2019, Vol. 1, p. 1-8Conference paper, Published paper (Refereed)
Abstract [en]

Underground Thermal Energy Storage UTES systems are widely used around the world. The reason is that UTES is essential in utilizing Renewable Energy sources (RE). The efficiency of the energy system relies strongly on the efficiency of the storage system. Therefore, in the installation of a hyper-energy system, a lot of attention is to be paid in improving the storage system. In order to design an efficient storage system, firstly, standard criteria are to be investigated. These explain the process of making high efficiency storage system that must be specified. The criteria, mainly, depends on: best type and best location. These two variables are in high interference with each other. The bond between the two variables is represented by the geological, hydrological, meteorological, soil, hydrogeological properties/factors of the site. These factors are specified by geo-energy mapping. Despite the importance of this type of mapping, there is no specific criteria/formula that defines the choice. This paper aims to: give a brief literature review for UTES systems (types, classification, advantages/disadvantages for each type, and examples of an installed system). In addition, some factors within geo-energy mapping are highlighted and standard criteria to achieve good storage system are suggested. The suggested criterion comprises a process to transfer the quantity values to quality values according to the expert opinion. The suggested criteria are defined through the following stages: selecting the best type of UTES systems according to hydro-geological in site conditions; using the analytical hierarchy process to rank the best location to install the storage system and then using ArcMap (GIS-Software) to provide representative results as maps. Karbala Province (Iraq) is the study area used here

Place, publisher, year, edition, pages
Iceland: The Icelandic Geotechnical Society (IGS), 2019
Keywords
undeground thermal energy storage, site selection, geo-energy mapping, analytical heirarchy process, DRASTIC index
National Category
Engineering and Technology Geotechnical Engineering Water Engineering
Research subject
Soil Mechanics; Soil Mechanics; Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-76168 (URN)10.32075/17ECSMGE-2019-0983 (DOI)
Conference
XVII European Conference on Soil Mechanics and Geotechnical Engineering,(ECSMGE), 2019, 1 - 6 September 2019, Reykjavik, Iceland
Available from: 2019-09-30 Created: 2019-09-30 Last updated: 2019-10-01Bibliographically approved
Al-Madhlom, Q., Al-Ansari, N., Laue, J., Nordell, B. & Hussain, H. M. (2019). Site Selection of Aquifer Thermal Energy Storage Systems in Shallow Groundwater Conditions. Water, 11(7), Article ID 1393.
Open this publication in new window or tab >>Site Selection of Aquifer Thermal Energy Storage Systems in Shallow Groundwater Conditions
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2019 (English)In: Water, ISSN 2073-4441, E-ISSN 2073-4441, Vol. 11, no 7, article id 1393Article in journal (Refereed) Published
Abstract [en]

Underground thermal energy storage (UTES) systems are widely used around the world, due to their relations to heating ventilating and air conditioning (HVAC) applications [1]. To achieve the required objectives of these systems, the best design of these systems should be accessed first. The process of determining the best design for any UTES system has two stages, the type selection stage and the site selection stage. In the type selection stage, the best sort of UTES system is determined. There are six kinds of UTES systems, they are: boreholes, aquifer, bit, tank, tubes in clay, and cavern [2–5]. The selection of a particular type depends on three groups of parameters. They are: Site specific, design, and operation parameters (Figure 1). Apart from site specific parameters, the other two types can be changed through the life time of the system. The site specific parameters, e.g., geological, hydrogeological, and metrological, cannot be changed during the service period of the  ystem. Therefore, the design of the best type should depend, at first consideration, on site specific parameters.

Place, publisher, year, edition, pages
Switzerland: MDPI, 2019
Keywords
site selection, underground thermal energy storage systems, analytical hierarchy
National Category
Engineering and Technology Water Engineering Geotechnical Engineering
Research subject
Soil Mechanics; Urban Water Engineering
Identifiers
urn:nbn:se:ltu:diva-75229 (URN)10.3390/w11071393 (DOI)000480632300078 ()2-s2.0-85068541786 (Scopus ID)
Note

Validerad;2019;Nivå 2;2019-07-12 (johcin)

Available from: 2019-07-06 Created: 2019-07-06 Last updated: 2019-09-13Bibliographically approved
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