scholarly journals Qualité Hydro Chimique des Eaux de la Nappe Superficielle dans la Région de l'Oued Righ et Évaluation de sa Vulnérabilité à la Pollution = Hydrochemical Quality of the Groundwater of the Unconfined Aquifer in Oued Righ Region and Assessement of Its Vulnerability to Pollution

2016 ◽  
pp. 42-57
Author(s):  
Fella Abour ◽  
Mohamed Salah Belksier ◽  
Salah Chaab
Keyword(s):  
Unconfined Aquifer

Hydrogeochemistry and quality of groundwater of coastal unconfined aquifer in Amol–Ghaemshahr plain, Mazandaran Province, Northern Iran

2013 ◽  
Vol 71 (11) ◽  
pp. 4767-4782 ◽  
Author(s):  
Houshang Khairy ◽  
M. R. Janardhana
Keyword(s):  
Unconfined Aquifer ◽  
Mazandaran Province ◽  
Northern Iran

scholarly journals Groundwater quality of unconfined aquifer in Demak Regency, Indonesia

2021 ◽  
Vol 1943 (1) ◽  
pp. 012002
Author(s):  
T T Putranto ◽  
N Susanto ◽  
D R Pangestuti
Keyword(s):  
Groundwater Quality ◽  
Unconfined Aquifer

scholarly journals Geometry and water quality of the unconfined aquifer near the Piracicaba river, Ipatinga/MG, Brazil

HydroResearch ◽  
2019 ◽  
Vol 2 ◽  
pp. 31-39
Author(s):  
Débora Almeida de Oliveira ◽  
Paulo Galvão
Keyword(s):  
Water Quality ◽  
Unconfined Aquifer ◽  
Piracicaba River

scholarly journals Using Geographic Information System (GIS) to estimate the volume of water for Al Dammam unconfined Aquifer within Al Salman basin, Al- Muthana Governorate, South West Iraq

2019 ◽  
pp. 1478-1485
Author(s):  
Osamah N. Al-Sheikh ◽  
Ayser M. Al-Shamma’a
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Unconfined Aquifer ◽  
Geographic Information ◽  
Quality Of Water ◽  
Digital Elevation ◽  
Automate Calculation ◽  
West Iraq ◽  
Flow Map

The groundwater represents the main source of water in the study area due to lack of surface water. The Dammam unconfined aquifer represents the main aquifer in the study area and Southern desert because of the regional extent, the quantity and quality of water. Many groundwater wells have been drilled in the study area to coverage the huge demand of water for agricultural purposes. The Geographic Information System (GIS) was used to estimate the volume of water which calculated (25.6964 × 109 m3) within the study area , automate calculation of the area of Al Salman basin using digital elevation models, derive the thickness maps of AlDammam unconfined aquifer from Key holes (KH) and Bore holes (BH), draw the groundwater head and flow map in the study area. Such data derived from GIS can help authorities and researchers for groundwater management and further development within the study area.

scholarly journals Unconfined Groundwater Quality based on the Settlement Unit in Surakarta City

2004 ◽  
Vol 11 (1) ◽  
Author(s):  
Munawar Cholil
Keyword(s):  
Drinking Water ◽  
Population Density ◽  
Groundwater Quality ◽  
Chemical Properties ◽  
Unconfined Aquifer ◽  
The Difference ◽  
Major Chemical ◽  
Stiff Diagram ◽  
The Impact

The quality of groundwater of unonfined aquifer with growing population density is endangered by population. This may cause serious problem as greatest portion of the population utility groundwater of unconfined aquifer as their drinking water. This research is aim at studying the difference in quality of groundwater of unonfined aquifer in Surakarta Munipicality by settlement units, and studying the impact settlement factors and groundwater depth on the quality of groundwater of unonfined aquifer. The research was executed by a survey methhod, taking 44 units of groundwater of unonfined aquifer samples at stratified proportional random from 44 villages. The samples were analyzed at the laboratory of Local Drinking Water Company (PDAM) of Surakarta. Data were analyzed using by stiff diagram, variance analysis, and multiple regression. The research reveals that there is very little differences in the quality of free groundwater in Surakarta, as it is shown by same chemical properties. Several chemical properties were found very high in concentration, but the rest were simultaniously low. On the basis of minimum quality of drinking water coli content have exeeded the allowed limit for drinking water.Among the settlement units observed, there were no significant differences in the physical, chemical (except pH), bacteriological factors. This means that differences among various depth of water. Electrical onductivity (EC), Na, Mg, H2CO3, H2SO4, and NH3 were found different among various depth of water table. Major chemical conentration were significant with geology formation. Population density, built up areas, size of settlement, building density, and the condition of drainage simultaniously affect the quality of free ground water. No differences among settlement units was observed the most important fators determining the free groundwater quality was population density.

scholarly journals Hydrochemical of Groundwater for Al Dammam unconfined Aquifer within Al-Salman Basin, Al-Muthana Governorate, South West Iraq

2019 ◽  
pp. 1336-1349
Author(s):  
Osamah N. Al-Sheikh ◽  
Ayser M. AL-Shamma'a
Keyword(s):  
Field Work ◽  
Unconfined Aquifer ◽  
Dry Season ◽  
Water Type ◽  
Wet Season ◽  
Water Wells ◽  
Dry Seasons ◽  
West Iraq ◽  
Chadha’S Diagram

The quality of groundwater is just as important as its quantity. The kinds and concentration of salts in groundwater depend on the environment, movement, and the source of the groundwater. During the field work, 20 samples have been collected from water wells from Al-Salman basin for two seasons represent wet and dry seasons in November 2017 and April 2018. After water well samples have been analyzed the Electrical conductivity values range from (2260 to 5500) μS/cm for dry season and range from (2540 to 5630) μS/cm for wet season, the Total dissolved solids values range from (1289 to 3582) ppm for dry season and range from (1710 to 3960) ppm for wet season, and pH values range from (7.11 to 7.3) for dry and wet seasons. The Hydrochemical classification which applied using Piper's Diagram revealed there are three type of water (sulphate type Ca+2 – Mg+2 – Cl- – SO4, sulphate type Ca+2 – Mg+2 – Cl- - SO4, NaCl), and two water type by applying Chadha's diagram (sulphate type Ca+2 – Mg+2 – Cl- - SO4, Na+- Cl-), the variation of water type in the study area due to influence of Rus Formation which consists of anhydrite, and structure roles where made precipitation concentrate in Al-Salman depressions and streams flow faults that ended with playa.

scholarly journals Assessment of the Potential Pollution of the Abidjan Unconfined Aquifer by Hydrocarbons

Geosciences ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 60
Author(s):  
Amenan Kouamé ◽  
Michel Jaboyedoff ◽  
Albert Goula Bi Tie ◽  
Marc-Henri Derron ◽  
Kan Kouamé ◽  
...  
Keyword(s):  
Liquid Waste ◽  
Soil Surface ◽  
Unconfined Aquifer ◽  
Threshold Concentration ◽  
Anthropogenic Sources ◽  
Gas Stations ◽  
Sources Of Pollution ◽  
Potential Pollution ◽  
The City

A study of the unconfined Continental Terminal aquifer in Abidjan District, located in a coastal sedimentary basin in Southern Côte d’Ivoire (West Africa), is conducted. This aquifer is the principal source of drinking water for the city of Abidjan. The water quality of the aquifer is affected by anthropogenic sources of pollution, such as scattered deposits of solid and liquid waste of all kinds. Additionally, the proliferation of gas stations, including potential tank leakage, must be considered in the event of an accident. To ensure the effective protection and management of the Abidjan groundwater, this work assesses the groundwater contamination risk of the Abidjan aquifer by hydrocarbons such as benzene. To achieve this objective, a numerical groundwater model that included the geological and hydrogeological data of the Abidjan aquifer was constructed with FEFLOW 7.1. A predictive simulation of groundwater flow coupled with the transport of dissolved benzene deposited on the soil surface at the N’Dotré and Anador gas stations was performed. The initial concentrations of dissolved benzene were 43.12 mg/L and 14.17 mg/L at the N’Dotré and Anador sites, respectively. The results revealed that a threshold concentration of 0.001 mg/L was reached after 44 years and two months at borehole ZE11, which is located four kilometers downgradient from the source. The maximum peak concentration of 0.011 mg/L was reached at this point after 47 years and two months. In this region, 14 other boreholes could be threatened by dissolved benzene pollution based on the simulation.

Annotation: Class Size and the Quality of Educational Outcomes

1998 ◽  
Vol 39 (6) ◽  
pp. 797-804 ◽  
Author(s):  
Neville Bennett
Keyword(s):  
Educational Outcomes ◽  
Class Size

Immunoferritin localization of intracellular antigens in positively stained frozen sections

1978 ◽  
Vol 36 (2) ◽  
pp. 168-169
Author(s):  
K. T. Tokuyasu
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Thin Layers ◽  
The Other ◽  
Positive Staining ◽  
Frozen Sections ◽  
The Past ◽  
Ultrathin Frozen Sections ◽  
Definition Of

During the past investigations of immunoferritin localization of intracellular antigens in ultrathin frozen sections, we found that the degree of negative staining required to delineate u1trastructural details was often too dense for the recognition of ferritin particles. The quality of positive staining of ultrathin frozen sections, on the other hand, has generally been far inferior to that attainable in conventional plastic embedded sections, particularly in the definition of membranes. As we discussed before, a main cause of this difficulty seemed to be the vulnerability of frozen sections to the damaging effects of air-water surface tension at the time of drying of the sections.Indeed, we found that the quality of positive staining is greatly improved when positively stained frozen sections are protected against the effects of surface tension by embedding them in thin layers of mechanically stable materials at the time of drying (unpublished).

Sign in / Sign up

Export Citation Format

Share Document