• D.Nithya

Agricultural drought assessment has been performed by different researchers using various methods. Most of the agricultural drought methods depends on information related to drought such as weather condition, soil condition and water availability. The present study is carried out in the Virudhunagar district, which comes under southern plateau and hilly agro climatic zone. Here, in the present study, agricultural drought assessment is carried out using secondary data and satellite imageries. This research paper presents an efficient method for agricultural drought risk assessment using geographical information system. This is done by using the first session multi-thematic map layers viz., physical, climatic, soil and socio economic conditions including fifteen parameters and the second session drought indices. The agricultural drought risk assessment is done based on the raster overlay by ranking method in GIS. Based on the agricultural drought risk conditions pertaining to each parameter, it has been classified into three categories viz., high, moderate and mild risk for agricultural drought and ranks has been allotted appropriately. Finally overlay has been done to delineate the agricultural drought risk zones in block wise. The specific objectives include, preparing of drought indices maps from satellite images for a drought period to calculate the percentage of drought affected area and to show the effectiveness of satellite derived drought indices as an assessment and to identify the most drought risk prone area. Based on the above discussion the methodology for the present study is being framed and accordingly the following geospatial database is being collected.

agricultural drought, multi thematic layer, physical parameter, climatic parameter, soil properties and socio economic condition, GIS, NDVI,NDWI.NDMI, SAVI, TCI,LU/LC

"ASSESSMENT OF AGRICULTURAL DROUGHT IN VIRUDHUNAGAR DISTRICT USING GEO INFORMATICS TECHNIQUES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.455-466, April-2019, Available :http://www.jetir.org/papers/JETIR1904369.pdf

"ASSESSMENT OF AGRICULTURAL DROUGHT IN VIRUDHUNAGAR DISTRICT USING GEO INFORMATICS TECHNIQUES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp455-466, April-2019, Available at : http://www.jetir.org/papers/JETIR1904369.pdf