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Article
The Effect of Sesarma boulengeri(Calman) Crab Burrows on Surrounding Pore Water Chemistry in the Shatt Al-Arab NW Arabian Gulf

Author: H.A. Kadhim حمزة عبد الحسن كاظم
Journal: Marsh Bulletin مجلة الاهوار ISSN: 18169848 Year: 2008 Volume: 3 Issue: 2 Pages: 114-124
Publisher: Basrah University جامعة البصرة

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Abstract

The result of the present study has shown that presence of chemical elements concentration in the pore water surrounding the crab burrow depends on the distance from or depth of the burrow. After analyzing the samples in the laboratory, the results have demonstrated that the concentration of ammonium and phosphate decreases as we move away from the burrows edge, and there is also a significant difference with regard to the ammonium and phosphate concentrations. With respect to phosphate, there is no important significant difference, but the concentration of sulfide has increased with the distance from the burrow edge. Its highest concentration is at a distance of 12cm, such that there is a noticeable difference between the various samples. But there no change in the proportion of salinity and redox with the distance or depth from the burrow edge. The results have, also, that the crab burrows affect the pore water present in the sediments surrounding the burrows, to a distance that approaches 12 cm from the burrows opening . There, the activity of the crab burrows hasincreased the heterogeneity of the sediments in the area of study.


Article
The Formation Models of Gypsum Barrier, Chemical Temporal Changes and Assessments the Water Quality of Sawa Lake, Southern Iraq
موديل تكوين الجدار الجبسي والتغيرات الكيميائية الزمنية وتقييم نوعية مياه بحيرة ساوة, جنوب العراق

Authors: Salih Muhammed Awadh صالح محمد عوض --- RuaaIssa Muslim رؤى عيسى مسلم
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2014 Volume: 55 Issue: 1 Pages: 161-173
Publisher: Baghdad University جامعة بغداد

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Abstract

This study deals with formation models of gypsum barrier, chemical temporal changes, and assessments of the Sawa Lake within the Al- Muthanna province, Southern Iraq, it is a very important issue to find the water quality and water assessments of this lake. Eleven water samples are collected from Sawa Lake. Many scientific concepts are used such as major cations (Ca2+, Mg2+, Na+ and K+), major anions (SO4=,Cl-,HCO3- and CO3=) with minor anions ( PO43-, NO3-) and H2S . Trace elements (Pb, Cd, Zn, As, Ni, Co, Cu, Mn, Fe, As, Sr And B) and bacterial test were analyzed in each sample. Total dissolved solids (TDS), electrical conductivity (EC), pH and temperature (T) were directly measured in the field. The equilibrium state between the concentration and evaporation contributed actively to build the salt wall surrounded the lake. The building wall of the Lake is a barrier of gypsum, which is in a dynamic state between construction and dissolution.The length of gypsum barrier surrounding the lake is 12.5 km with 3-6 m high. Gypsum wall collapse occurs in abundance in the sites that face the wind which activates the erosion processes. The chemistry of Sawa Lake during 1977, 1983 and 2003 was Na- SO4=; then it was changed to be as Mg-Cl from during 2007and 2011 (present study). This study revealed that theSawa Lake water is as unsuitable for drinking, livestock and irrigationpurposes.

تهتم هذه الدراسة بموديل تكون الجدار ألجبسي لبحيرة ساوه و بالتقييمالكيميائي لنوعية المياه, والتغييرات الزمنية الكيميائية للبحيرة، بحيرة ساوه تقع غرب السماوه ضمن محافظة المثنى، جنوب العراق. تم جمع احدى عشرة عينة ماء من البحيرة, جميعها حللت للايونات الموجبة الرئيسية (Ca2+,Mg2+,Na+ and K+)والايونات السالبة الرئيسية (SO4=,Cl-,HCO3- and CO3=) والايوناتالسالبه الثانوية ( PO43-, NO3-) و H2S العناصر النادرة (Pb, Cd, Zn, As, Ni, Co, Cu, Mn, Fe, As, Sr and B) والتحاليل البكترية بالإضافة إلى الأملاح الصلبة الذائبة الكلية والتوصيلية الكهربائية والرقم الهيدروجيني والحرارة حيث تم قياسها في الحقل.يحيط بالبحيرة جدار جبسي, حيث تلعب عمليات الترسيب دور أساسي في عملية تكون هذا الجدارألجبسي بواسطة التوازن بين والترسيب و التبخر. يبلغ محيط الجدار 12.5 كم وارتفاعه 3 إلى 6 أمتار. تتكون كهوف بسبب عمليات الاذابه للجدار ألجبسي. بينت الدراسة إنكيمياء مياه بحيرة ساوه خلال الأعوام 1977،1983 ،2003 كانت صوديه- كبريتيه، تختلف عن 2007 و2011 ( الدراسة الحالية) حيث تغيرات إلى مغنسيوم- كلوريد. كما صنفت الدراسة نوعية مياه هذه البحيرة على أنها غير صالحه لأغراض الشر ب وسقي الحيوانات والري.

Marsh Bulletin
مجلة الاهوار

ISSN: 18169848
Publisher: Basrah University جامعة البصرة
Subject: Environmental studies (General) --- Aquaculture and fisheries --- Biology --- Ecology and nature conservation

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Abstract

a Scientific journal founded by Ammar Charitable Foundation in collaboration with the Faculty of Science, University of Basra.date of first issue 2006no. of issue per year (2)No. of per issue published between 2006-2013 (15) issue

مجلة علمية محكمة اسست من قبل مؤسسة عمار الخيرية بتعاون مع كلية العلوم جامعة البصرةتاريخ اول عدد صدر سنة 2006عد الاعداد التي تنشر بالسنة عددينعدد الاعداد التي صدرت خلال الفترة بين 2006-2013 هو 15 عدد

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