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Using The Normalized Difference Vegetation Index (NDVI) in Drought Assessing in The Eastern North Region in Syria

استخدام مؤشر الاختلاف النباتي القياسي NDVI في تقدير الجفاف في المنطقة الشمالية الشرقية من سورية

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 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




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Climate change is the major global challenge facing water resources managers because of its impacts on many life fields beginning with agriculture activities to economic - social regions. In this study, drought in the eastern north of Syria have been investigated (Hasake, Rakka, DerAzzor, Bokmal, Kameshli) using a set of data containing precipitation data for period from 2000 to 2010, and MODIS time series images for the same period. This study assure that 2008/2009 described as drought period in the study area, and the NDVI maps ,which we have, give us an idea about the vegetation status and patterns in the study area. The study clearly show that NDVI and rainfall was found to be highly correlated in Rakka with P- Value= 0.003; and medium correlated in the other stations with P- Value > 0.05. Results of this study verify needing to use this index (NDVI), along with precipitation data, in drought monitoring in the eastern north region of Syria. So that,. It would help managers in making decisions to face drought in this area.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة استخدام مؤشر الاختلاف النباتي القياسي (NDVI) لتقدير الجفاف في المنطقة الشمالية الشرقية من سوريا، والتي تشمل الحسكة، الرقة، دير الزور، البوكمال، والقامشلي. تم تحليل بيانات الأمطار للفترة من 2000 إلى 2010 وصور MODIS الشهرية لنفس الفترة. أكدت النتائج أن عامي 2008 و2009 كانا عامين جافين في منطقة الدراسة، وأظهرت خرائط NDVI معلومات عن كثافة وتوزيع النباتات. أظهرت الدراسة وجود علاقة قوية ومعنوية بين قيم الأمطار السنوية ومؤشر NDVI في الرقة، بينما كانت هذه العلاقة متوسطة وغير معنوية في باقي المحطات. توصلت الدراسة إلى أن استخدام مؤشر NDVI مع بيانات الأمطار يمكن أن يكون أداة فعالة لمراقبة الجفاف في المنطقة الشمالية الشرقية من سوريا، مما يساعد الإداريين في اتخاذ القرارات المناسبة لمواجهة الجفاف.
Critical review
دراسة نقدية: على الرغم من أن الدراسة تقدم نتائج هامة حول استخدام مؤشر NDVI في مراقبة الجفاف، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل تضمين تحليل أعمق للعوامل الأخرى التي تؤثر على الجفاف مثل درجة الحرارة والرطوبة. ثانياً، الدراسة اعتمدت بشكل كبير على بيانات الأمطار وصور الأقمار الصناعية، وكان من الممكن تعزيز النتائج من خلال جمع بيانات ميدانية إضافية. ثالثاً، كان من الممكن توسيع نطاق الدراسة ليشمل مناطق أخرى في سوريا للحصول على صورة أشمل عن تأثير الجفاف. وأخيراً، كان من المفيد تقديم توصيات أكثر تفصيلاً حول كيفية استخدام نتائج الدراسة في السياسات الزراعية والمائية.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي من الدراسة هو استخدام مؤشر الاختلاف النباتي القياسي (NDVI) مع بيانات الأمطار لمراقبة الجفاف في المنطقة الشمالية الشرقية من سوريا.

  2. ما هي الفترة الزمنية التي تم تحليلها في الدراسة؟

    تم تحليل بيانات الأمطار وصور MODIS الشهرية للفترة من 2000 إلى 2010.

  3. ما هي العلاقة بين قيم الأمطار السنوية ومؤشر NDVI في الرقة؟

    أظهرت الدراسة وجود علاقة قوية ومعنوية بين قيم الأمطار السنوية ومؤشر NDVI في الرقة.

  4. ما هي التوصيات التي قدمتها الدراسة؟

    أوصت الدراسة باستخدام مؤشر NDVI كأداة فعالة لمراقبة الجفاف واعتماده ضمن برامج مراقبة وإدارة الجفاف لصياغة خطط إدارة فعالة لمكافحة التأثيرات الكارثية للجفاف.


References used
CHOPRA, P. Drought risk assessment using remote sensing and GIS, A case study in Gujarat, M. Sc. Thesis, Dept. of Geo-information Science and Earth Observation, ITC,2006, Netherlands
EASTMAN, J. R.;SANGERMANO, F.;GHIMIRE, B.;ZHU, H. L.;CHEN, H.; Neeti, N. Seasonal trend analysis of image time series. International Journal of Remote Sensing. 30,2009, 2721-2726
FENSHOLT, R.;PROUD, S. R. Evaluation of earth observation based on long term vegetation trends- comparing GIMMS and MODIS global NDVI time series. Remote sensing of Environment, 119,2012, 131-147
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