Nadhir Al-Ansari

Nadhir Al-Ansari
Luleå University of Technology | LTU · Department of Civil, Environmental and Natural resources engineering

Professor, PhD
Professor at Lulea Technical University Sweden

About

902
Publications
689,396
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Introduction
Professor at the department of Civil, Environmental and Natural Resources Engineering at Lulea Technical University Sweden. Research interests are mainly in Water Resources and Environment. Served several academic administrative post (Dean, Head of Department). Publications include more than 800 articles in international/national journals, chapters in books and 22 books. He supervised more than 70 postgraduate students. He executed more than 60 major research projects in Iraq, , Jordan, Sweden
Additional affiliations
December 2007 - present
Luleå University of Technology
Position
  • Professor (Full)
December 2007 - present
Luleå University of Technology
Position
  • Professor (Full)
September 1995 - June 2007
Al al-Bayt University
Position
  • Professor (Full)
Education
July 1973 - April 1976
University of Dundee
Field of study
  • Water Resources

Publications

Publications (902)
Article
Full-text available
The twelve wells were selected to carry out the various test, duration of pumping (min), maximum draw drown (m), duration of recovery (min), residual drawdown, and aquifer type in the basaltic rock aquifer parameters of Buchakewadi watershed. The source and flow of groundwater are essential concerns in hydrological systems that concern both spatial...
Article
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The study aimed to determine Aluminum sludge composition and structure for its valorisation as an alternative natural material for heavy metals removal from wastewater for further reuse as treated water in different applications. The study was conducted to investigate the introduction of Al-bearing sludge composition. The physical and chemical prop...
Article
Full-text available
Dissolved oxygen (DO) is one of the main prerequisites to protect amphibian biological systems and to support powerful administration choices. This research investigated the applicability of Shannon's entropy theory and correlation in obtaining the combination of the optimum inputs, and then the abstracted input variables were used to develop three...
Article
Full-text available
Dissolved oxygen (DO) is one of the main prerequisites to protect amphibian biological systems and to support powerful administration choices. This research investigated the applicability of Shannon’s entropy theory and correlation in obtaining the combination of the optimum inputs, and then the abstracted input variables were used to develop three...
Article
Full-text available
This study aims to evaluate the hydro-chemical characteristics of Ouargla, Algeria basin groundwaters harvested from the Mio Pliocene aquifer. The study covered 70 samples; the physical parameters, potential of hydrogen (pH), and electrical conductivity EC μS.cm −1 were determined in situ, using a multiparameter; the laboratory analysis included dr...
Article
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In global warming contexts, continuous increment in temperature triggers several environmental, economic, and ecological challenges. Its impacts have severe e‡ects on energy, agriculture, and socioeconomic structure. Moreover, the strong correlation between temperature and dynamic changing of rainfall patterns greatly in‰uences the natural cycles o...
Article
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In global warming contexts, continuous increment in temperature triggers several environmental, economic, and ecological challenges. Its impacts have severe effects on energy, agriculture, and socioeconomic structure. Moreover, the strong correlation between temperature and dynamic changing of rainfall patterns greatly influences the natural cycles...
Article
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In this paper, the Innovative Trend Methodology (ITM) and their inspired approaches, i.e., Double (D-ITM) and Triple (T-ITM), were combined with Hilbert Huang transform (HHT) time frequency-based method. The new hybrid methods (i.e., ITM-HHT, D-ITM-HHT, and T-ITM-HHT) were proposed and compared to the DWT-based methods in order to recommend the bes...
Article
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Severe droughts and mismanagement of water resources during the last decades have pro�pelled authorities in the Kurdistan Region to be con�cerned about better management of precipitation which is considered the primary source of recharg�ing surface and groundwater in the area of interest. The drought cycles in the last decades have stimu�lated wate...
Article
Full-text available
Severe droughts and mismanagement of water resources during the last decades have propelled authorities in the Kurdistan Region to be concerned about better management of precipitation which is considered the primary source of recharging surface and groundwater in the area of interest. The drought cycles in the last decades have stimulated water st...
Article
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Climate and land-use change are important factors in the hydrological process. Climatic and anthropic changes have played a crucial role in surface runoff changes. The objective of this research was to apply land-use change and future climate change to predict runoff change in the Pak Phanang River Basin. The Cellular Automata (CA)-Markov model was...
Article
Full-text available
: Climate and land-use change are important factors in the hydrological process. Climatic and anthropic changes have played a crucial role in surface runoff changes. The objective of this research was to apply land-use change and future climate change to predict runoff change in the Pak Phanang River Basin. The Cellular Automata (CA)-Markov mode...
Conference Paper
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Iraq relies in its water resources on the Tigris and Euphrates and their tributaries. It is located at the lower part of the catchment area of these rivers. The long-term average annual flow that enter Iraq is about 30 BCM from the Euphrates, 22.2 BCM from the Tigris, 24.78BCM from tributaries and 7BCM from side valleys between Iraq and Iran. No...
Article
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Existing bond-slip (τ-s) relations for fibre-reinforced polymer (FRP)-steel joints employ different shapes and mathematical expressions, inferring that their predictions of failure load and mode, and other interface properties, might be inconsistent or inaccurate. In this study, predictions of four widely used τ-s relations are evaluated using a la...
Article
Full-text available
Groundwater in the Touggourt region—or as its named, Oued Righ—in southeastern Algeria, is the only source of irrigation. To assess its suitability for agricultural purposes, we collected 72 samples from wells at this region, physical and chemical measurements were carried out for each water sample, and calculations of the sodium adsorption ratio (...
Article
Full-text available
Groundwater in the Touggourt region—or as its named, Oued Righ—in southeastern Algeria, is the only source of irrigation. To assess its suitability for agricultural purposes, we collected 72 samples from wells at this region, physical and chemical measurements were carried out for each water sample, and calculations of the sodium adsorption ratio (...
Article
Full-text available
Existing bond-slip (τ-s) relations for fibre-reinforced polymer (FRP)-steel joints employ different shapes and mathematical expressions, inferring that their predictions of failure load and mode, and other interface properties, might be inconsistent or inaccurate. In this study, predictions of four widely used τ-s relations are evaluated using a la...
Article
Full-text available
Existing bond-slip (τ-s) relations for fibre-reinforced polymer (FRP)-steel joints employ different shapes and mathematical expressions, inferring that their predictions of failure load and mode, and other interface properties, might be inconsistent or inaccurate. In this study, predictions of four widely used τ-s relations are evaluated using a la...
Preprint
The Iraqi territory is located in the extreme northeastern part of the Arabian Plate which is in collision with the Iranian (Eurasian) Plate. The collision which is still ongoing has created tens of folds some of them exhibit different types of faults. The exerted compressional forces are believed to be decreasing southwest wards as being far from...
Article
Full-text available
One of the main concerns for engineers, during operation of dams, is uncontrolled seepage though the foundations of dams and hydraulic structures which is mainly resulted from poor geological conditions and lead to undermine erosion or piping that may endanger the safety of dam. In this study, numerical models were utilized to evaluate the excessiv...
Preprint
The Iraqi Western and Southern deserts are part of the Iraqi Stable Shelf (Inner Platform) that belongs to the Arabian Plate. Therefore, both deserts lack tectonic forms like folds, faults; however, very rarely faults and regional lineaments can be seen in both deserts. Although both deserts are tectonically stable; but tens of Neotectonic indicati...
Article
Full-text available
Nowadays, great attention has been attributed to the study of runoff and its fluctuation over space and time. There is a crucial need for a good soil and water management system to overcome the challenges of water scarcity and other natural adverse events like floods and landslides, among others. Rainfall-runoff (R-R) modeling is an appropriate app...
Article
Full-text available
Water quality has a significant influence on human health. As a result, water quality pa rameter modelling is one of the most challenging problems in the water sector. Therefore, the major factor in choosing an appropriate prediction model is accuracy. This research aims to analyse hybrid techniques and pre-processing data methods in freshwater qua...
Article
Full-text available
Water quality has a significant influence on human health. As a result, water quality parameter modelling is one of the most challenging problems in the water sector. Therefore, the major factor in choosing an appropriate prediction model is accuracy. This research aims to analyse hybrid techniques and pre-processing data methods in freshwater qual...
Article
Full-text available
This study aims to analyze the spatial distribution of the epidemic spread and the role of the physical, social, and economic characteristics in this spreading. A geographically weighted regression (GWR) model was built within a GIS environment using infection data monitored by the Iraqi Ministry of Health records for 10 months from March to Decemb...
Article
Full-text available
Safeen anticline is one of the most complicated anticlines in Iraqi Kurdistan Region (IKR), with NW–SE trend. Structur�ally, the anticline is truncated by diferent types of faults; some of them are deep-seated faults, which have complicated the subsurface form of the anticline. The anticline includes two domes with two parasitic anticlines and syn...
Article
Full-text available
The limited amount of freshwater is the most important challenge facing Egypt due to increasing population and climate change. The objective of this study was to investigate how climatic change affects the winter potato water footprint at the Nile Delta covering 10 governorates from 1990 to 2016. Winter potato evapotranspiration (ETC) was calculate...
Article
Safeen anticline is one of the most complicated anticlines in Iraqi Kurdistan Region (IKR), with NW–SE trend. Structurally, the anticline is truncated by different types of faults; some of them are deep-seated faults, which have complicated the subsurface form of the anticline. The anticline includes two domes with two parasitic anticlines and sync...
Article
Full-text available
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...
Article
Full-text available
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 simula...
Article
Full-text available
Drought is a prolonged period of low precipitation that negatively impacts agriculture, animals, and people. Over the last decades, gradual changes in drought indices have been observed. Therefore, understanding and forecasting drought is essential to avoid its economic impacts and appropriate water resource planning and management. This paper pres...
Article
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Landslides can be a major challenge in mountainous areas that are influenced by climate and landscape changes. In this study, we propose a hybrid machine learning model based on a rotation forest (RoF) meta classifier and a random forest (RF) decision tree classifier called RoFRF for landslide prediction in a mountainous area near Kamyaran city, Ku...
Preprint
Full-text available
Nowadays, great attention has been attributed to the study of runoff and its fluctuation over space and time. There is a crucial need for a good soil and water management system to overcome the challenges of water scarcity and other natural adverse events like floods and landslides, among others. Rainfall-runoff modeling is an appropriate approach...
Article
Full-text available
The development of an accurate soft computing method for groundwater level (GWL) forecasting is essential for enhancing the planning and management of water resources. Over the past two decades, significant progress has been made in GWL prediction using machine learning (ML) models. Several review articles have been published, reporting the advanc...
Article
Full-text available
The Climate change is a global issue affecting different parts of our planet where we are living. However, the reasons of climate change and consequences differ at different parts too. In Iraq, including the Kurdistan Region, the reasons for the climate change are due to man-made and natural effects, where the rates of CO2 emission and those of oth...
Article
Full-text available
Groundwater is the second largest store of freshwater in the world. The sustainability of the ecosystem is largely dependent on groundwater availability, and groundwater has already been under tremendous pressure to fulfill human needs owing to anthropogenic activities around various parts of the world. The footprints of human activities can be wit...
Article
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Climate change is one of the leading issues affecting river basins due to its direct impacts on the cryosphere and hydrosphere. General circulation models (GCMs) are widely applied tools to assess climate change but the coarse spatial resolution of GCMs limit their direct application for local studies. This study selected five CMIP5 GCMs (CCSM4, Ha...
Article
Full-text available
Surface water and groundwater are significant for population and other activities due to the decreasing surface water flow toward Iraq. Therefore, there is a need to analyze groundwater’s quality and classification and its applicability as an alternative in various human activities in the study area. This study utilized the groundwater quality inde...
Article
Full-text available
Emerging contaminants (ECs) are synthetic or naturally occurring chemicals or any microorganisms that are not commonly monitored in the environment but have the potential to enter the environment and cause known or suspected adverse ecological or human health effects. The issue of ECs persistent in the environment and can disrupt the physiology of...
Article
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Saturated hydraulic conductivity (Ks) is an important soil characteristic that controls water moves through the soil. On the other hand, its measurement is difficult, time-consuming, and expensive; hence Pedotransfer Functions (PTFs) are commonly used for its estimation. Despite significant development over the years, the PTFs showed poor performan...
Article
Full-text available
Reference evapotranspiration (ETo) plays an important role in agriculture applications such as irrigation scheduling, crop simulation, water budgeting, and reservoir operations. Therefore, the accurate estimation of ETo is essential for optimal utilization of available water resources on regional and global scales. The present study was conducted t...
Article
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For developing countries, scarcity of climatic data is the biggest challenge, and model development with limited meteorological input is of critical importance. In this study, five data intelligent and hybrid metaheuristic machine learning algorithms, namely additive regression (AR), AR-bagging, AR-random subspace (AR-RSS), AR-M5P, and AR-REPTree,...
Article
Full-text available
Predicting rainfall amount is essential in water resources planning and for managing structures, especially those against floods and long-term drought establishment. Machine learning techniques can produce good results using a minimum dataset requirement, making it a leader among the prediction algorithms. This work develops a hybrid-learning model...
Article
Full-text available
Drought is a complex phenomenon that occurs due to insufficient precipitation. It does not have immediate effects, but sustained drought can affect the hydrological, agriculture, economic sectors of the country. Therefore, there is a need for efficient methods and techniques that properly determine drought and its effects. Considering the significa...
Article
Full-text available
This experimental study concerns the elimination of fluoride from water using an electrocoagulation reactor having a variable flow direction in favour of increasing the electrolysing time, saving the reactor area, and water mixing. The detention time of the space-saver EC reactor (S-SECR) was measured and compared to the traditional reactors using...
Article
Full-text available
Water resources are of great importance in the world's agriculture, especially regarding the scarcity of these resources. That calls for attention appropriate for analysis, study, and research in all issues and aspects that would contribute to the development and maintenance of those resources and achieve the maximum possible levels of quality and...
Preprint
Full-text available
Trash mulches are very effective in preventing soil erosion; reduce sediment transport rate, runoff rate and increasing infiltration. The study was carried out with the objectives to observe the sediment outflow from sugar cane leaf (trash) mulch treatments at selected land slopes under simulated rainfall conditions by using rainfall simulator of s...
Article
Full-text available
Climate variability, land use and land cover changes (LULCC) have a considerable impact on runoff–erosion processes. This study analyzed the relationships between climate variability and spatiotemporal LULCC on runoff–erosion processes in different scenarios of land use and land cover (LULC) for the Almas River basin, located in the Cerrado biome i...
Article
Full-text available
Landslide susceptibility mapping is considered a useful tool for planning, disaster management, and natural hazard mitigation of a region. Although there are different methods for predicting landslide susceptibility, the bivariate statistical analysis method is considered to be simple and popular. In this study, the main aim is to evaluate the perf...
Preprint
Full-text available
Evaluation of water quality is important for the management of water resources. The current study is focused on water quality data monitoring analysis. of the Tigris River in Iraq by the application of the principal component analysis (PCA), cluster analysis (CA), and water quality index (WQI). Twelve water quality parameters were taken from 14 sta...
Article
Full-text available
The increases in extreme rainfall could increase the probable maximum food (PMF) and pose a severe threat to the critical hydraulic infrastructure such as dams and food protection structures. This study is conducted to assess the impact of climate change on PMF in a tropical catchment. Climate and infow data of the Tenmengor reservoir, located in t...
Article
Preparation of new sorbent from precipitation of nano-sized (Mg/Fe-CTAB)- layered double hydroxide (LDH) on the surfaces of sewage sludge byproduct to remove the anionic and cationic dyes was the focal point of this work. The presence of nanoparticles and enlarged of interlayers by CTAB intercalation have increased the sludge surface area from 5.34...
Article
Full-text available
In the construction and cement manufacturing sectors, the development of artificial intelligence models has received remarkable progress and attention. This paper investigates the capacity of hybrid models conducted for predicting the compressive strength (CS) of concrete where the cement was partially replaced with ground granulated blast-furnace...
Article
Full-text available
Developing accurate soft computing methods for groundwater level (GWL) forecasting is essential for enhancing the planning and management of water resources. Over the past two decades, significant progress has been made in GWL prediction using machine learning (ML) models. Several review articles have been published, reporting the advances in this...
Article
Full-text available
Water level predictions in the river, lake and delta play an important role in flood management. Every year Mekong River delta of Vietnam is experiencing flood due to heavy monsoon rains and high tides. Land subsidence may also aggravate flooding problems in this area. Therefore, accurate predictions of water levels in this region are very importan...
Article
Full-text available
Assessing irrigation water quality is one of the most critical challenges in improving water resource management strate- gies. The objective of this work was to predict the irrigation water quality index of the Bahr El-Baqr, Egypt, based on non- expensive approaches that requires simple parameters. To achieve this goal, three artificial intelligenc...