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Register a new userUsing WEPP model to estimate soil water erosion in the coastal zone-Syria
استخدام برنامج WEPP لتقدير كمية التربة المنجرفة في المنطقة الساحلية-سورية
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يعد الانجراف المائي للتربة عاملا رئيسا من عوامل تدهور الأراضي في المنطقة الساحلية في سوريا, و يمثل تهديدا حقيقيا للبيئة و الموارد الطبيعية على المدى البعيد, حيث يحصل ضياه كميات كبيرةمن العناصر المغذية و المادة العضوية من الطبقة السطحية للتربة ثم تترسب في النهاية على الطرقات و الآبار و المجاري المائية. يهدف هذا البحث إلى تقدير فعالية نموذج WEPP.
Soil water erosion is one of the most important factors of soil degradation. Soil erosion is a process that causes loss of big amounts of nutrients and organic matter from the topsoil layer and pollutes the surface water bodies. The USDA- WEPP (Water Erosion Prediction Project erosion model) represents a new generation technology for estimating soil loss by water erosion and sediment delivery from hillslopes and small watersheds. The main purpose of this study was evaluating the capability of WEPP model.
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Research summary
تتناول هذه الدراسة استخدام نموذج WEPP (Water Erosion Prediction Project) لتقدير كميات التربة المنجرفة في المنطقة الساحلية السورية. يهدف البحث إلى تقييم فعالية النموذج في تقدير كميات التربة المنجرفة في تسعة مواقع مختلفة الميول وتحت ثلاث منظومات بيئية مختلفة (زراعية، غابات، ومراعي محروقة). تم استخدام أربعة مؤشرات إحصائية لتقييم دقة النموذج وهي معامل الارتباط بيرسون، معامل فعالية ناش-ساتكليف، معامل الانحياز النسبي، ومعامل الجذر التربيعي للخطأ. أظهرت النتائج فعالية عالية للنموذج في تقدير كميات التربة المنجرفة في المنظومة الزراعية، حيث سجلت قيمة معامل الارتباط بيرسون 0.96 ومعامل فعالية ناش-ساتكليف 0.84. بينما كانت فعالية النموذج أقل في المنظومتين الغابية والمراعي المحروقة، حيث سجلت قيم معاملات الارتباط بيرسون 0.69 و0.67 ومعامل فعالية ناش-ساتكليف 0.07 و0.43 على التوالي. توصي الدراسة بضرورة تحسين النموذج ليشمل متغيرات إضافية وتحسين دقة التقديرات في المنظومات البيئية المختلفة.
Critical review
دراسة نقدية: على الرغم من أن الدراسة قدمت نتائج مهمة حول فعالية نموذج WEPP في تقدير كميات التربة المنجرفة في المنطقة الساحلية السورية، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل تضمين المزيد من المواقع التجريبية لزيادة دقة النتائج وتعميمها. ثانياً، لم يتم تناول تأثير العوامل المناخية المتغيرة بشكل كافٍ، وهو ما يمكن أن يؤثر بشكل كبير على دقة التقديرات. ثالثاً، كان من الممكن تحسين النموذج ليشمل متغيرات إضافية مثل نوعية التربة ومحتوى المادة العضوية بشكل أكثر تفصيلاً. أخيراً، توصي الدراسة بإجراء المزيد من البحوث لتحسين دقة النموذج في المنظومات البيئية المختلفة، وهو ما يعكس الحاجة إلى تطوير مستمر في هذا المجال.
Questions related to the research
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ما هو الهدف الرئيسي من الدراسة؟
الهدف الرئيسي من الدراسة هو تقييم فعالية نموذج WEPP في تقدير كميات التربة المنجرفة في المنطقة الساحلية السورية تحت ثلاث منظومات بيئية مختلفة.
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ما هي المؤشرات الإحصائية المستخدمة في الدراسة لتقييم دقة النموذج؟
تم استخدام أربعة مؤشرات إحصائية وهي معامل الارتباط بيرسون، معامل فعالية ناش-ساتكليف، معامل الانحياز النسبي، ومعامل الجذر التربيعي للخطأ.
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كيف كانت فعالية نموذج WEPP في تقدير كميات التربة المنجرفة في المنظومة الزراعية؟
أظهرت النتائج فعالية عالية للنموذج في تقدير كميات التربة المنجرفة في المنظومة الزراعية، حيث سجلت قيمة معامل الارتباط بيرسون 0.96 ومعامل فعالية ناش-ساتكليف 0.84.
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ما هي التوصيات التي قدمتها الدراسة لتحسين دقة النموذج؟
توصي الدراسة بضرورة تحسين النموذج ليشمل متغيرات إضافية وتحسين دقة التقديرات في المنظومات البيئية المختلفة، بالإضافة إلى إجراء المزيد من البحوث لتحسين دقة النموذج.
References used
ABACI,O. and A.N. PAPANICOLAOU.2009. Long-term effects of management practices on water-driven soil erosion in an intense agricultural sub-watershed: monitoring and modeling. Hydrol. Process.vol 23, 2818– 2837P
DUN, S. 2006. ADAPTING WEPP (WATER EROSION PREDICTION PROJECT) FOR FOREST WATERSHED EROSION MODELING. WASHINGTON STATE UNIVERSITY-Department of Biological Systems Engineering
EID,Yusuf. 2004. Report on predominant climatic situation in the Syrian coast.88P
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