Do you want to publish a course? Click here

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

3447   1   125   0 ( 0 )
 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

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
rate research

Read More

In this study, drought in the eastern region of Syria (Hasake, Rakka, DerAzzor, Bokmal & Kameshli) has been investigated using SPI, NDVI indices. We used a set of data containing precipitation data for period from 1975 to 2010 to calculate Standardized Precipitation Index SPI, and MODIS time series images in April for period from 2000 to 2010 to calculate the Normalized Difference Vegetation Index NDVI.
This study builds on the data revealed by the survey carried in 2005 by the Commission for Planning and International Cooperation and UNFPA Syria in the governorates of the north and northeast Syria.
The main objective of this study was to describe economic and econometric analysis of cost functions of rain-feed barley production in the northern region from Syria and determine the economically efficient size and the profitmaximizing size, Prim ary data collected in (2010) through research interviews with farmers were used. Farms in the rainfed areas in. the northern region were divided according to stabilization zones (1, 2, 3 and 4), Through the descriptive economic analysis of costs of production of Farms in the rainfed areas in the northern region were divided according to stabilization zones (1, 2, 3 and 4), Through the descriptive economic analysis of costs of production of Barley, it was shown that the highest average cost of production of one dunum in the northern region was 1859.3 sp. in zone (1) and the lowest average cost of production of one dunum was 1694.5 sp. in zone (4), From the analysis of costs and returns, the results indicated that the highest net return (profit) in the northern region was 650.43 sp./dunum in zone (1), and the lowest net return (profit) was 395.2 sp./dunum. in zone (3) Also, the results of the descriptive economic analysis indicated that the lowest average cost of production of 1 kg of barley was 8.3 sp. in zone (1 and 2), and the highest average cost of production of 1 kg of oil was 9.3 sp. in zone (4), Using the econometric models of cost functions, the economically efficient size and the profit-maximizing size were computed and determined for each zone, indicating that farmers' practices were too far from these sizes based on the econometric analysis; namely the economically efficient size and the profit-maximizing size. Also the results indicated that the economically efficient acreage size was 35.8 dunum in zone (4), which was less than the actual area of this region.
Drought is a recurrent phenomenon and a normal feature of climate. It is one of the major natural hazards that frequently hits Syria, causing significant damages to ecosystems and social–economic environment, especially agricultural areas. The purpo se of current study is to estimate the degree of severity and the frequency of drought at seasonal and annual timescales in the southern region of Syria by applying the Standardized Precipitation Index (SPI) on the rainfall data recorded over (1958-2006) in four climatic stations: Damscus, Khrabo, Dara and El-Sweda. The results showed that there were no significant changes or trends in annual winter and spring rainfall at southern region scale. They also showed its frequent exposure to drought. At annual timescale, Damscus and Khrabo stations were distinguished from the others by extreme drought, and Khrabo by severe drought. The season mostly exposed to drought events was spring, followed by winter and autumn seasons. The absence of the evere drought of Dara winter, and the extreme drought of Damscus and Khrabo autumn were also observed.
The study was conducted in the eastern region of Syria to know the extent of cultivation development of wheat and cotton production and the factors affecting these crops during 1996-2010. The results showed that the effect of time on the productio n and productivity of wheat was not changed statistically, while the cotton area was decreased significantly during the study period. The total production of wheat was also affected significantly and positively by cultivated area and planting costs per hectare, and negatively by purchase price, while the production of cotton was affected significantly and positively by costs and purchase prices. According to the geographical region, the results showed that the production in the eastern region was significantly affected by Al-Raqqa production for wheat and cotton crops and Al-Hassake production for wheat crop. However, wheat productivity at Deir Ezzor was significantly superior compared to Al-Raqqa and Al-Hassake. The study recommended expanding the cultivation of wheat and cotton and support and expand the role of agricultural extension.
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا