Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : groundwater

Simulation of Contaminants Transport and Groundwater Flow for Basrah Landfill Site

A.A. Al-Suraifi

Engineering and Technology Journal, 2017, Volume 35, Issue 6, Pages 560-570

groundwater aquifers is mostly effected from landfills due to intrusion of leachate from its base b. Active surface of landfills represents main source for leachate generation during rains or may be due to direct contact with groundwater, leading to the transport 5 pollutants from landfill which is intrudes to the aquifer under the landfill. In this research a 3-dimensional simulation models was constructed and calibrated to characterize groundwater flow and leachate pollution transport from Basrah province main landfill site. The selected study area is Al-Rafdhia landfill site, which is lie at Al-Zubair district (southern part of Iraq at Basrah). The model used in the simulation was Visual MODFLOW finite difference approach. All the required landfill and aquifer parameters, stressing and recharge estimates from field and laboratories works, Basrah climate data, observations, soil investigation reports and previous studies for the same region and then used in the model or adjusted by calibration. Six-month observation period was achieved to estimate the monthly state variables data such as heads and physical-chemical leachate and groundwater characteristics by measurement and sampling from the groundwater selected wells. Many soils and water samples were collected to know the aquifer characteristics and analyze the pollutants concentration values.
Accordingly, the calibrated model was used to simulate the flow and pollution transport at current year and then used for prediction of future changes in water levels and landfill contaminant transport in the aquifer for planning period of 15 future years. The final simulation and predication results show that the landfill represent main source of contamination and the pollution would occur in the aquifer at high levels and with approximate lateral transporting of 285 m/year if the current state of solid waste disposal continue with increase of pumping from the aquifer from its current rate with future. The groundwater flow and concentration profiles for pollutants with time and spaces from the pollution sources was predicated and a 3-D representation were done for pollutants spreading for specific pollutants.

Quality management for Ground water by Assessment of Aquifer Vulnerability to Contamination in Erbil City

Khalil I. Wali; Zina M. Alwan

Engineering and Technology Journal, 2016, Volume 34, Issue 4, Pages 698-714

Groundwater Protection begins with an assessment of the sensitivity of its environment. This study attempts to create a groundwater vulnerability map for Erbil city, Groundwater quality management can be effectively carried out by mapping for groundwater vulnerability to contamination. The purpose of this study is to evaluate the vulnerability of the aquifer to pollution in Erbil city, and to discover the groundwater vulnerable zones to pollution in the aquifer of the study area and to provide spatial analysis of the parameters and conditions under which groundwater may become polluted by using DRASTIC method within GISienvironment. According to the DRASTIC model index, the results show that in the South-eastern part of the studied area, highly vulnerability to pollution due to the aquifer media consists of gravel and sand, it is also found that the most parameter effects on the calculation is the soil media. It found that when the soil is gravel, “the Impact of Vadose Zone” is composed of gravel and sand and “Hydraulic conductivity” is high. Most of the studied areas are found to be classified within the moderate level of vulnerability to contamination.

Determination The Suitable Locations for Drilling Wells for Irrigation purpose by using Geographic Information System (GIS

Alaa Ghadhban Khalaf

Engineering and Technology Journal, 2016, Volume 34, Issue 3, Pages 80-89

This study was conducted for the purpose of study and analysis of groundwater in the Karbala Governorate. Relied on a set of data and maps that relate to groundwater, topography and geology of the region in addition to 60 wells were distributed randomly in the region, all of this data has been entered in GIS environment to performance geometric and digital processing for it and completion of the analysis and extract the results from it.After conducting all necessary analyzes has been produced digital map that shows the best places to drill wells for irrigation in the region, depend on the topography of the region, basins and streams, sodium ratio and the proportion of dissolved salts in the groundwater in addition to the depths of those waters.where , the best place to drill wells was selected in the areas which has a little slopes because it contain high proportion of groundwater in addition to the sodium ratio in these areas does not exceed 40%, and this ratio consider good for irrigation, as well as the proportion of dissolved salts which range from 2,000 to 5,000 ppm and Although the height of this proportion , but the nature of the soil in the area and depths of groundwater led to use this water for irrigation , where it was observed that the soil of the region contain a high percentage of sand, in addition to the groundwater depths greater than 5 meter and this led to lack of water and salts accumulate in the plant root zone. Also three-dimensional map has been produced for the aquifer and the depths and thickness of the aquifer groundwater in the area.

Performance Evaluation of Electrocoagulation Technique for Removing Groundwater Hardness of Tikrit University

Maha I Alali

Engineering and Technology Journal, 2012, Volume 30, Issue 18, Pages 3268-3279

The performance of Electrocoagulation (EC) process for removal of hardness in
groundwater(GW) of Tikrit University in Salahaddin province, north of Baghdad in
Iraq has been studied using aluminum (Al)electrodes with both bipolar and
monopolar configurations. The effect of initial pH, applied voltage(U), electrolysis
time(t), and electrodes configurations on the performance of EC has been
investigated. It was found that the best initial pHvalue to remove hardness(HD)was
9.5. The results indicated that increasing U and t had a positive effect on the
hardness removal efficiency(%Ehardness ) to reach 90.4%andit was influenced by the
electrodes configuration in which %Ehardness was 83.5% in bipolar connection
compared with 66.2%in monopolar connection.Also The electrical energy
consumption%Ehardness and the experimentally and theoreticallyelectrodes
consumption (Wexp ) and (Wtheo )were calculated.It was absorbed,as determined, that
there is no significant difference between pseudo-first and second-order kinetic
model except at 40 volt that the pseudo second-order kinetic model fits better than
the first-order kinetic model with the data of the electrocoagulation process. Finally
the cost at themost favorable conditions for EC process was calculatedresulting that
the electrocoagulation process is successfully applied to remove the hardness rate
from groundwater with high performance.