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Satellite Based Analysis for Drought Monitoring and Risk Assessment- Sudan

	International Journal of Scientific Research and Engineering Development (IJSRED)	Full Text:
	Published Issue : Volume-4 Issue-1
	Year of Publication : 2021
	Unique Identification Number : IJSRED-V4I1P99
	Authors :Elbasri Abulgasim, Solafa Babiker
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Abstract :

Over the years , increasing of drought events more frequent triggered the agricultural sector and food security in dry regions, therefore, timely high detailed information are essential for drought preparedness, mitigation and response that formed straightforward importance of monitoring process for large regions where availability of relevant ground observation data are much challenging. This study investigated monitoring, assessment and frequency of drought hazard in Sudan using geospatial data by combined satellite-based drought indices namely standardized precipitation index (SPI) and vegetation health index (VHI), generated for three years of 2009, 2011and 2015, these indices are integrated to derive drought hazard maps and drought frequency occurrence .The regression analysis was generated for SPI index using available rainfall stations data and for the indices against each other .The results indicated that most of the country experienced severe drought especially Northern states, parts of Eastern and Western country, while the moderate drought was found in the western region. Regression analysis resulted high significant r², therefore, the study concluded validity of two indices for drought hazard assessment and VHI is good indicator for drought assessment in different vegetation types. High spatial variation of two indices inside the country evidenced the effect of climate change on Sudan and high frequent occurrence indicated high vulnerability for drought event, this result will assist decision making for drought planning programs and adaptation practices for agricultural sustainability plans.