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Article
Hydrological Operation Requirements for Restoration and Improving Water Quality of Al Qurna Marsh

Author: Ali S. Al Saady
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 10 Pages: 1902-1916
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

A hydrological routing study for Al Qurna Marsh was carried out to estimate the hydrological state within the marsh for the Present and future conditions of the marsh. The water surface elevation, area and storage within the marsh at the present and for the future conditions were estimated and the effect of uncontrolled outlets on the hydrological and water quality state of the marsh at the present conditions was specified. The salt mass - balance equation was used to estimate the inflow and outflow discharges that required for reducing the effect of evapotranspiration on the water quality and flashing out the accumulated mass of salts and then improving the marsh water quality. This equation was applied on the future conditions of themarsh and inflow and outflow discharges that required for this purposes were estimated. Results of the hydrological routing for the present conditions showed that the maximum water surface area is 785 km2 which occur during October. While it is 431km2 during September and it can not be increased during these months since the outlet of the marsh is uncontrolled. The TDS concentration within the marshincreases during the months of high evapotranspiration although the inflow increases during these months. For the future conditions, the inflow discharges required to sustain the restoration requirements must be increased to decrease the deterioration in the marsh water quality. These discharges increase with the increase in the marsh areaduring the months of high evapotranspiration values.


Article
Hydrological Operation Requirements for Restoration and Improving Water Quality of Abu Zirig Marsh
متطلبات التشغيل الهيدرولوجية لإنعاش وتحسين نوعية مياه هور أبو زرك

Authors: Ammar Adel Ali --- Haitham A. Hussein --- Mahmoud S. Al Khafaji
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2010 Volume: 28 Issue: 17 Pages: 5614-5627
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

A hydrological routing study for Abu Zirig Marsh was carried out toestimate the hydrological state within the marsh for the Present and future conditions of the marsh.The water surface elevation, area and storage within the marsh at the present and for the future conditions were estimated and the effect of uncontrolling outlets on the hydrological and water quality state of the marsh at the present conditions was specified. The salt mass balance equation was used to estimate the inflow and outflow discharges that required for reducing the effect of evapotranspiration on the water quality and flashing out the accumulated mass of salts and then improving the marsh water quality. This equation was applied on the future conditions of themarsh and inflow and outflow discharges that required for this purposes were estimated. The results of the hydrological routing for the present conditions showed that the maximum water surface area is 79 km2 which occur during Spring. While it is between 34 to 43 km2 during Summer and Autumn and it can not be increased during these months since the outlet of the marsh is uncontrolled. The TDS concentration within the marsh increases during the months of high evapotranspiration although the inflow increases during these months. For the future conditions, the inflow discharges required to sustain the restoration requirements must be increased to decrease the deterioration in the marsh water quality. These discharges increase with the increase in the marsh areaduring the months of high evapotranspiration values.

تم تنفيذ دراسة إستتباع هيدرولوجي لهور أبو زرك لتحديد الوضع الهيدرولوجي في الهور وفقاً للظروف الحالية والمستقبلية للهور. تم حساب منسوب ومساحة سطح الماء والخزن في الهور للظروف الحالية والمستقبلية وتم تحديد تأثير المنافذ غير المسيطر عليها على الوضع الهيدرولوجي وعلى نوعية المياه في الهور للظروف الحالية. تم إستخدام معادلة الموازنة الملحية لتحديد التصاريف التي يجب إدخالها وإخراجها من الهور لتقليل تأثير التبخر- نتح على نوعية المياه و تصريف كتلة الأملاح المتجمعة وبالتالي تحسين نوعية مياهالهور. تم تطبيق هذه المعادلة على الظروف المستقبلية للهور وتم إيجاد التصاريف المطلوبة لهذا الغرض. بينت نتائج الإستتباع الهيدرولوجي للظروف الحالية إن اقصى مساحة لسطح الماء هي 79 كم 2 وتحصل في فصل الربيع في حين تتراوح بين 34 و 43 كم 2 في فصلي الصيف والخريف ولايمكن زيادتها اكثر من ذلك بسبب محدودية المياه المتوفرة ولعدم وجود منشأت سيطرة على منافذ الهور. كما إن تراكيز المواد الصلبة الذائبة تزداد في الهور خلال تلك الأشهر على الرغم من زيادة التصاريف خلال هذه الأشهر. إن التصاريف المطلوبة لتلبية متطلبات إعادة الإغمار يجب زيادتها لتقليل التدهور في نوعية مياهالهور وهذه الزيادة تزداد مع زيادة مساحة الهور خلال الأشهر التي تكون فيها قيم لتبخر–نتح عالية.

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