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Document Type : Article In Journal 
Document Title :
Impact of Natural and Human Activities on the C roundwater Quality in the Southern Part of AI Madinah Al Munawwarah, Saudi Arabia
تأثير أنشطة بشريّة و طبيعيّة على جودة روندواتر سي في الجزء الجنوبيّ من المدينة المنورة، المملكة العربيّة السّعوديّة
 
Subject : Impact of Natural and Human Activities on the C roundwater Quality in the Southern Part of AI Madinah Al Munawwarah, Saudi Arabia 
Document Language : English 
Abstract : Groundwater in the southern part of Al Medinah Al Munawwarah area exists in the Quaternary alluvial deposits of Wadi Al Aqiq as well as the basaltic lava flows and the buried sediments of the Harrat Rahat Plateau. The basaltic and sub¬basaltic aquifers are mainly confined to semi-confined, with a saturated thickness of 30m. On the other hand, the Wadi Al Aqiq aquifer is unconfined, and the saturated thickness ranges between 30-40m. The groundwater flow is generally toward the north and northwest. The TDS values range widely from 1515 to 7292 mg/l (average 4083 mg/l). Such a wide range of TDS value indicates the effect of several major processes acting either individually or collectively. Among these; recycling of +line irrigation water, water-rock interaction and anthropogenic activities. Hydrochemical facies is of Na-Cl type in Harrat Rahat. Values of Na/CI ratio indicate that silicate weathering and halite dissolution are the main sources that release Na into groundwater. Hydrochemical facies in Wadi Al Aqiq groundwater is of Ca-S04 type. Calcium-rich silicate minerals and gypsum in the alluvial deposits of Wadi Al Aqiq are the major sources of Ca and S04 in groundwater. Groundwater from this aquifer contains high levels of toxic heavy metals, such as As, Pb, Cd ,Fe and ~ which render it unsafe for drinking purposes as compared with WHO guidelines. These high concentrations are mainly derived from leakage of industrial wastewater from the unlined disposal site located to the west of Wadi Al Aqiq. Enrichment of NO] in groundwater in the study area is most likely related 10 intensive usage of fertilizers and leakage of sewage 
ISSN : 1319-0989 
Journal Name : Arts and Humanities Journal 
Volume : 35 
Issue Number : 1 
Publishing Year : 1428 AH
2008 AD
 
Article Type : Article 
Added Date : Sunday, January 30, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
طارق بيوميBayumi, Tariq InvestigatorDoctorate 

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