Change search
Link to record
Permanent link

Direct link
Alternative names
Publications (10 of 250) Show all publications
Tommik, K., Knutsson, S., Laue, J. & Lintzén, N. (2023). Air velocity and temperature distribution in culverts. Cold Regions Science and Technology, 212, Article ID 103888.
Open this publication in new window or tab >>Air velocity and temperature distribution in culverts
2023 (English)In: Cold Regions Science and Technology, ISSN 0165-232X, E-ISSN 1872-7441, Vol. 212, article id 103888Article in journal (Refereed) Published
Abstract [en]

Uneven frost heave in roads and railways is a frequent problem in cold regions leading to degradation of structures. To improve drainage, culverts are frequently integrated into road and railway embankments. The presence of culverts changes the temperature distribution in the surrounding soil as cold air passes through the culvert. Consequently, frost depth and corresponding frost heave are increased in the vicinity of the culvert compared to the rest of the structure if frost susceptible soil is present. For an accurate frost related design, information of heat balance between the culvert and the surrounding soil is needed. A field study focusing on convective heat transfer in culverts was conducted in northern Sweden by the authors. Temperatures and air velocities in culverts of three sizes (0.6, 0.8 and 3.4 m) were recorded. Analysis of obtained data is presented in this paper with emphasis on the influence of air velocity on the temperature distribution. Influence of wind on development of airflow in culverts is also addressed. Accuracy of trained gaussian process regression (GPR) models is estimated in predicting temperature distribution inside of culverts. It is concluded, based on the field measurement data, that airflow can significantly affect temperature distribution inside culverts and development of airflow in culverts is largely influenced by the orientation of the culvert in relation to the predominant wind direction.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Air flow, Cold climate, Culvert, Seasonally frozen ground
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-97692 (URN)10.1016/j.coldregions.2023.103888 (DOI)2-s2.0-85159163586 (Scopus ID)
Funder
Swedish Transport Administration
Note

Validerad;2023;Nivå 2;2023-06-02 (hanlid)

Available from: 2023-06-02 Created: 2023-06-02 Last updated: 2023-09-05Bibliographically approved
Dibs, H., Al-Ansari, N. & Laue, J. (2023). Analysis of Remotely Sensed Imagery and Architecture Environment for Modelling 3D Detailed Buildings Using Geospatial Techniques. Engineering, 15(05), 328-341
Open this publication in new window or tab >>Analysis of Remotely Sensed Imagery and Architecture Environment for Modelling 3D Detailed Buildings Using Geospatial Techniques
2023 (English)In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 15, no 05, p. 328-341Article in journal (Refereed) Published
Abstract [en]

The use of three-dimensional maps is more effective than two-dimensional maps in representing the Earth’s surface. However, the traditional methods used to create digital surface models are not efficient for capturing the details of Earth’s features. This is because they represent only three-dimensional objects in a single texture and do not provide a realistic representation of the real world. Additionally, there is a growing demand for up-to-date and accurate geo-information, particularly in urban areas. To address this challenge, a new technique is proposed in this study that involves integrating remote sensing, Geographic Information System, and Architecture Environment software to generate a highly-detailed three-dimensional model. The method described in this study includes several steps such as acquiring high-resolution satellite imagery, gathering ground truth data, performing radiometric and geometric corrections during image preprocessing, producing a 2D map of the region of interest, constructing a digital surface model by extending the building outlines, and transforming the model into multi-patch layers to create a 3D model for each object individually. The research findings indicate that the digital surface model obtained with comprehensive information is suitable for different purposes, such as environmental research, urban development and expansion planning, and shape recognition tasks.

Place, publisher, year, edition, pages
Scientific Research Publishing, 2023
Keywords
Satellite Image, SketchUp Environment, Digital Surface Model, 3D Detailed Buildings
National Category
Remote Sensing Other Computer and Information Science
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-97880 (URN)10.4236/eng.2023.155026 (DOI)
Note

Godkänd;2023;Nivå 0;2023-06-05 (joosat);

Licens fulltext: CC BY License

Available from: 2023-06-05 Created: 2023-06-05 Last updated: 2023-09-05Bibliographically approved
Al Mousawi, E., Jahad, U. A., Chabuk, A., Al-Ansari, N., Majdi, A. & Laue, J. (2023). Applying Different Water Quality Indices and GIS to Assess the Water Quality, Case Study: Euphrates River in Qadisiyah Province. Polish Journal of Environmental Studies, 32(5), 4201-4217
Open this publication in new window or tab >>Applying Different Water Quality Indices and GIS to Assess the Water Quality, Case Study: Euphrates River in Qadisiyah Province
Show others...
2023 (English)In: Polish Journal of Environmental Studies, ISSN 1230-1485, E-ISSN 2083-5906, Vol. 32, no 5, p. 4201-4217Article in journal (Refereed) Published
Abstract [en]

A well-known tool for assessing the quality of surface water is the water quality index (WQI) model. In this study, the WQI was generated to classify the water flowing in the Euphrates River in Qadisiyah Province. To develop analytical models, a connection between the findings and satellite images was developed. It is possible to determine what category a river’s water quality for domestic use will fall into. The Weighted Arithmetic Water Quality Index (WWQI), Canadian Water Quality Index (CWQI),and Bascarón Water Quality Index (BWQI) were used to evaluate and examine the suitability of the Euphrates River in the city by analysing the water quality of samples taken from the five locations (Muhanawia (L1), Salahia (L2), Shamiyah (L3), Shamiyah (L4), Gammas (L5)). The hydrogen ionspH, temperature T, dissolved oxygen DO, nitrate NO3, calcium Ca, magnesium Mg, total hardness TH, potassium K, sodium Na, sulfate SO4, chlorine Cl, total dissolved solids TDS, and electrical conductivity ECvalues are provided for 2020 and 2021. Results showed the Euphrates River was deemed severely contaminated at location Gammas (L5) but acceptable at location Muhanawia (L1). During the research phase, the water quality for the Euphrates achieved a maximum of 87.43 using the CWQI for Muhanawia (L1) in 2021 and a minimum of 15.6 using the BWQI for Gammas (L5) in 2021. The excessive sulphate, total dissolved solids, calcium, and total hardness concentrations led to the low WQI. The results are analysed using a GIS, and a network database connected to the GIS is required to utilize its analytical capabilities and the geographically scattered data throughout the study region. The Water Quality Index (WQI) is not suitable for drinking, as it is below the average of the World Health Organization (WHO) suggestions.

Place, publisher, year, edition, pages
HARD, 2023
Keywords
water quality, index, Euphrates River, Qadisiyah Province, GIS
National Category
Geotechnical Engineering Oceanography, Hydrology and Water Resources
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-99202 (URN)10.15244/pjoes/163505 (DOI)2-s2.0-85167724129 (Scopus ID)
Funder
Luleå University of Technology
Note

Validerad;2023;Nivå 2;2023-08-16 (joosat);

Funder: Al-Mustaqbal University College, Iraq

Available from: 2023-07-14 Created: 2023-07-14 Last updated: 2023-10-11Bibliographically approved
Amli, A. S., Al-Ansari, N. & Laue, J. (2023). Behavior of Reinforcement Bars in Foundation with Soil to Satisfy Sustainability. Journal of Engineering and Sustainable Development, 27(5), 558-564
Open this publication in new window or tab >>Behavior of Reinforcement Bars in Foundation with Soil to Satisfy Sustainability
2023 (English)In: Journal of Engineering and Sustainable Development, ISSN 2520-0917, Vol. 27, no 5, p. 558-564Article in journal (Refereed) Published
Abstract [en]

This study presents the behavior of using many types of reinforcement with slab foundations to satisfy sustainability. This foundation with soil effect and two types of bar reinforcement (steel bars and geogrid) are taken. Nonlinear analysis is used with the theoretical model by finite element program software ABAQUS to represent the many types of reinforced concrete foundations with both unsaturated and saturated soil with the effect of loading. Effect of load-displacementrelationships with many cases which were taken for this study such as the geogrid and steel bar ratio in reinforcement of foundation with unsaturated and saturated soil. From this study, it is shown that reinforcement by geogrid increased the strength of the member or the foundation when taken with different ratios of reinforcement by steel bars and get the best sustainable way or solution by decreasing the reinforcement by steel. The ratio of geogrid is 40% to 20 % from total reinforcement, while the required member or foundation in the case of soil, which is unsaturated, is more strength than it is in the case of saturated soil.

Place, publisher, year, edition, pages
Mustansiriyah University College of Engineering, 2023
Keywords
Geogrid, load-displacement, nonlinear analysis, saturated and unsaturated soil
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-101334 (URN)10.31272/jeasd.27.5.1 (DOI)2-s2.0-85169677688 (Scopus ID)
Note

Godkänd;2023;Nivå 0;2023-09-13 (joosat);

CC BY 4.0 License

Available from: 2023-09-13 Created: 2023-09-13 Last updated: 2023-09-13Bibliographically approved
Al-Ansari, N., Adamo, N., Hachem, A. H., Sissakian, V., Laue, J. & Abed, S. A. (2023). Causes of Water Resources Scarcity in Iraq and Possible Solutions. Engineering, 15(9), 467-496
Open this publication in new window or tab >>Causes of Water Resources Scarcity in Iraq and Possible Solutions
Show others...
2023 (English)In: Engineering, ISSN 1947-3931, E-ISSN 1947-394X, Vol. 15, no 9, p. 467-496Article in journal (Refereed) Published
Abstract [en]

Iraq relies in its water resources on the waters of the Tigris and Euphrates and their tributaries. The country is located in the lower part of the catchment area of these rivers. The long-term average annual flow that enters Iraq from these rivers is about 30 BCM from the Euphrates, 21.2 BCM from the Tigris, 24.78 BCM from tributaries and 7 BCM from side valleys between Iraq and Iran. Now, the flow of these rivers is decreasing due to climate change and hydrological projects established in the upper parts of the catchment. It is indicated that precipitation will decrease by 15% - 25% during this century and that means that the flow of the Tigris and Euphrates rivers will be reduced by 29% - 73%. This will cause a grave depletion of groundwater resources. Türkiye is trying to finish building 22 dams and 19 hydropower stations. Iran built 12 dams and diverted the flow of some tributaries inside Iran and blocked all the valleys that contribute water from its land to Iraq. For these reasons, Iraq is experiencing shortages in its water resources and there is some sort of friction and conflict between riparian countries within the Tigris and Euphrates basins because each country tries to secure its water resources. In this research, the factors affecting the hydro politics within these basins are water scarcity, climate change and hydrological projects, population growth rate, energy issues, water mismanagement, economic changes, expansions of projects and technology, political issues, international water laws and public awareness. In case the situation remains as it is, Iraq will experience many problems in health, environment, economy, and security. To solve the problem of water scarcity in Iraq, two parallel lines of action are to be considered. These are: 1) Reach agreements with Riparian Parties; 2) Develop a long-term strategy that should take the following: a) Rehabilitating of existing dams, barrages & pump stations, b) Improving the efficiency of diversion and supply, c) Using of nonconventional water resources, d) Irrigation modernization using suitable techniques, e) Developing a public awareness program, f) Developing human resources program and establishing an agenda for training, g) Developing an agricultural plan that takes into consideration the possibility of reducing crops that consume a lot of water.

Place, publisher, year, edition, pages
Scientific Research Publishing, 2023
Keywords
Tigris River, Euphrates River, Iraq
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-101303 (URN)10.4236/eng.2023.159036 (DOI)
Note

Godkänd;2023;Nivå 0;2023-09-11 (joosat);

CC BY 4.0 License

Available from: 2023-09-11 Created: 2023-09-11 Last updated: 2023-09-11Bibliographically approved
Jahad, U. A., Chabuk, A., Alabas, M. A., Mahmoud, A. S., Al-Ansari, N. & Laue, J. (2023). CFD Analysis of the Effects of Compound Downstream Slope on Flow Over the Spillway. Journal of Ecological Engineering, 24(11), 274-286
Open this publication in new window or tab >>CFD Analysis of the Effects of Compound Downstream Slope on Flow Over the Spillway
Show others...
2023 (English)In: Journal of Ecological Engineering, E-ISSN 2299-8993, Vol. 24, no 11, p. 274-286Article in journal (Refereed) Published
Abstract [en]

The volume of the stilling basin can be reduced, energy can be dissipated, and floods can be contained with the help of spillways. The aim of this Computational Fluid Dynamics (CFD) study is to investigate how compound slopes change water flows through spillways. To measure turbulence, the Realizable k-ε model was used, and the multiphase volume of fluid (VOF) method was utilized to determine where air and water meet. Five models of spillways with different slopes (normal slope (MS1) = 30°, compound slope(MS2 and MS3) = 20°/39°, and compound slope (MS4 and MS5) = 39°/20°) were modelled and simulated using the ANSYS Fluent software to determine their flow characteristics. Numerical simulation results were compared to experimental results, and it was found that the CFD model captured the key flow aspects accurately. The numerical model carefully observes the several flow patterns (nappe, transition, and skimming) that emerged owing to variations in slope and geometry. When it comes to dissipating energy, models with a compound slope (39°/20°) do the best. When compared to the normal slope model (30°) with a step size of 10, the increase in energy dissipation is 14%. According to the findings, the TKE (turbulent kinetic energy) was elevated by the compound slope. The results of this research show that the spillway can be operated effectively and reliably under a wide range of flow conditions, fulfilling an important goal of the project.

Place, publisher, year, edition, pages
Polish Society of Ecological Engineering (PTIE), 2023
Keywords
compound slope, volume of fuid, spillway, CFD, energy dissipation
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-101412 (URN)10.12911/22998993/171704 (DOI)2-s2.0-85172292622 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-09-22 (joosat);

CC BY 4.0 License

Available from: 2023-09-22 Created: 2023-09-22 Last updated: 2023-11-06Bibliographically approved
Chabuk, A., Jahad, U. A., Majdi, A., Majdi, H. S. H., Isam, M., Al-Ansari, N. & Laue, J. (2023). Estimating of gases emission from waste sites to generate electrical energy as a case study at Al-Hillah City in Iraq. Scientific Reports, 13, Article ID 15193.
Open this publication in new window or tab >>Estimating of gases emission from waste sites to generate electrical energy as a case study at Al-Hillah City in Iraq
Show others...
2023 (English)In: Scientific Reports, E-ISSN 2045-2322, Vol. 13, article id 15193Article in journal (Refereed) Published
Abstract [en]

Methane (CH4) is a greenhouse gas resulting from human activities, especially landflls, and it hasmany potential environmental issues, such as its major role in global warming. On the other hand,methane can be converted to liquid fuel or electricity using chemical conversion or gas turbinegenerators. Therefore, reusing such gases could be of great environmental and economic beneft. Inthis context, this study aims to estimate the emissions of methane gas from the landflls in Al-HillahCity, Iraq, from 2023 to 2070 and the producible electric energy from this amount. The estimatingprocess was carried out using the Land GEM model and compared with traditional models. Theobtained results demonstrated that the total estimated landfll methane emissions for 48 years are875,217 tons, and the average annual methane emission is 18,234 tons based on a yearly wasteaccumulation rate of 1,046,413 tons and a total waste amount of 50,227,808 tons. The anticipatedloads of methane gas can be utilized to generate about 287,442 MW/year of electricity from 2023to 2070. In conclusion, the results obtained from this study could be evidence of the potentialenvironmental and economic benefts of harvesting and reusing methane gas from landflls.

Place, publisher, year, edition, pages
Springer Nature, 2023
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-101350 (URN)10.1038/s41598-023-42335-3 (DOI)001068217200010 ()37709862 (PubMedID)2-s2.0-85171332369 (Scopus ID)
Funder
Luleå University of Technology
Note

Validerad;2023;Nivå 2;2023-09-15 (joosat);

Funder: Al-Mustaqbal University College, Iraq;

CC BY 4.0 License

Available from: 2023-09-14 Created: 2023-09-14 Last updated: 2023-10-11Bibliographically approved
Do, T. M., Laue, J., Mattsson, H. & Jia, Q. (2023). Excess pore water pressure generation in fine granular materials under undrained cyclic triaxial loading. International Journal of Geo-Engineering, 14(1), Article ID 8.
Open this publication in new window or tab >>Excess pore water pressure generation in fine granular materials under undrained cyclic triaxial loading
2023 (English)In: International Journal of Geo-Engineering, E-ISSN 2198-2783, Vol. 14, no 1, article id 8Article in journal (Refereed) Published
Abstract [en]

Understanding the mechanism of excess pore water pressure generation in subgrades is essential for not only designing but also further maintenance purposes. The primary goal of this research was to investigate excess pore water pressure generation in fine granular materials under cyclic loading. A series of undrained cyclic triaxial tests were performed to study the excess pore water pressure generation in two selected fine granular materials: (1) railway sand and (2) tailings. The excess pore water pressure response of these materials was evaluated in terms of density conditions, number of cycles, and applied cyclic stress ratios (CSR). As a result, excess pore water pressure accumulated over time due to cyclic loading. However, its accumulation was significantly dependent on the governing factors, i.e., densities, CSR values, and material types. The excess pore water pressure exhibited a slight increase at low CSR values, but a sharp increase was observed at higher CSR values, which ultimately led to a failure state after a certain number of cycles. In addition, under the same loading conditions, the samples that had higher relative compaction showed better resistance to cyclic loads as compared to those with lower relative compaction. Finally, a relationship between excess pore water pressure and cyclic axial strain of the fine granular materials was discovered.

Place, publisher, year, edition, pages
Springer Nature, 2023
Keywords
Excess pore water pressure, Railway sand, Tailings, Undrained cyclic triaxial loading
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-96255 (URN)10.1186/s40703-023-00185-y (DOI)2-s2.0-85150975017 (Scopus ID)
Funder
Swedish Transport AdministrationLuleå University of Technology
Note

Validerad;2023;Nivå 2;2023-03-27 (hanlid);

Funder: Swedish joint research program for road and railway geotechnology Bransch-samverkan i grunden (BIG); Swedish Hydropower Centre (SVC)

Available from: 2023-03-27 Created: 2023-03-27 Last updated: 2023-10-11Bibliographically approved
Al Mousawi, E., Jahad, U. A., Mahmoud, A. S., Chabuk, A., Naje, A. S., Al-Ansari, N. & Laue, J. (2023). Implementation of the Quality and Creating GIS Maps for Groundwater in Babylon, Iraq. Journal of Ecological Engineering, 24(8), 310-321
Open this publication in new window or tab >>Implementation of the Quality and Creating GIS Maps for Groundwater in Babylon, Iraq
Show others...
2023 (English)In: Journal of Ecological Engineering, E-ISSN 2299-8993, Vol. 24, no 8, p. 310-321Article in journal (Refereed) Published
Abstract [en]

In times of water scarcity, groundwater is a vital resource that provides an alternate source of water for human consumption. In Iraq, the quality of rivers has been greatly affected by climate change and the dwindling availability of surface water. Examining and classifying the groundwater in this region is now vital. The present study sought to incorporate the groundwater property data (drinking purpose) with a geographic information system (GIS). Eleven variables were measured in 25 wells to investigate the physio-chemical properties around the Babylon province of Iraq. Based on the acceptability of groundwater for drinking, the GWQI was categorized into four primary groups in the results. Approximately 28% of the twenty-five wells (1811.04 km2) are of excellent quality, 24% are of good quality (1552.3 km2), 44% are of low quality (2845.9 km2), and 4% are extremely contaminated. (2587.2 km2). The average GWQI for the entire study region was 110.7, making it inappropriate for human consumption. It has been determined that approximately 52% of the groundwater from the examined wells can be deemed safe for consumption, although certain measurements surpass the permissible limits. To guarantee residents in these areas are supplied with water of superior quality and safety, treatment of the tested groundwater is recommended before use.

Place, publisher, year, edition, pages
Polish Society of Ecological Engineering (PTIE), 2023
Keywords
GIS, Groundwater Quality, Wells, Quality Index, IDW Interplation
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-99043 (URN)10.12911/22998993/166392 (DOI)2-s2.0-85164568059 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-06-29 (joosat);

Licens fulltext: CC BY License

Available from: 2023-06-29 Created: 2023-06-29 Last updated: 2023-10-11Bibliographically approved
Lagerlund, J., Viklander, P., Laue, J. & Toromanovic, J. (2023). Methodology for remediation grouting in embankment dams -grouting with a new type of non-hardening grout. In: : . Paper presented at 91st Annual ICOLD Meeting, June 13-14, 2023, Gothenburg, Sweden. , Article ID 30.
Open this publication in new window or tab >>Methodology for remediation grouting in embankment dams -grouting with a new type of non-hardening grout
2023 (English)Conference paper, Published paper (Other academic)
Abstract [en]

The core soil of an embankment dam can be exposed to deteriorating processes, i.e., different kinds of internal erosion due to high hydraulic gradients, disadvantageous particle size distribu-tion, too coarse-grained filters or built-in defects. During internal erosion, fines from the core soil are washed out by the seepage, decreasing the impervious properties of the core. If the internal erosion process is discovered in time, drilling and grouting can be performed to stop the erosion. During drilling and grouting, eroded material from the core soil is replaced.

In this paper, the methodology: “Identification – Localization – Characterization – Remediation” has been proposed. The methodology was tested on a large-scale embankment dam in a laboratory environment. The dam had a central core of moraine and was built inside a watertight concrete structure so a reservoir of water could be created upstream the dam. The left abutment of the dam had higher seepage rates than the rest of the dam and therefore had to be remediated.

During the identification and localization phase, a 10 x 10 cm horizontal, high hydraulic conduc-tivity zone through the core soil was identified and localized at the left abutment at 1 m depth. During drilling at the abutment, it was found that the core soil beneath the damage had become more wet compared to when built. The remedial method used was compaction grouting with a new developed type of non-hardening grout material. The grouting pressures equaled the height of the vertical grout material column with an additional pressure of ~50 kPa to compensate for frictional losses during injection. The grout material was delivered via a novel pipe system where water and air were allowed to be drained. The seepage was lowered by 44 % directly after grout-ing and 60% four months after grouting.

National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-95227 (URN)
Conference
91st Annual ICOLD Meeting, June 13-14, 2023, Gothenburg, Sweden
Available from: 2023-01-11 Created: 2023-01-11 Last updated: 2024-01-29Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-1935-1743

Search in DiVA

Show all publications