An overview of Drought evaluation and monitoring using remote sensing and GIS

Drought is one of the most threatened natural vulnerabilities that are initiated by reason of scarcity of rain in a specific region. By comparing with all other natural hazards, it is very tough to discover since it develops slowly and have massive effect on the society and environment. Hence, in many countries satellite based drought indications have been recommended for early identification. Weather-related and satellite based directories are used to identify variety of drought, comprising climatological, farming and hydrological drought. On account of the growth in water request and impending climate change, latest years have perceived much concentration on worldwide drought circumstances. The numerous atmospheric variables such as rainfall, temperature, wetness and vapor transpiration are essential to determine drought rigorousness level. In this proposed system, likened the model of agricultural drought and its association with further types of droughts and revised the development of research on agricultural drought monitoring directories on the source of station data and remote sensing. The cultivation part is susceptible to the drought. Currently satellite imagery has been used in the estimation of agriculture drought. The national management activities and local based community department can produce drought alleviation plan based on drought watching model. It also conferred the use of remotely sensed data for agriculture drought valuation. Completely the whole drought-prone countries would improve national drought strategies and readiness tactics that habitat importance on threat management instead of resulting the traditional method of disaster management, wherever the importance is on sensitive, crisis reaction processes. Disaster management reduces self-reliance and raises requirement on management and contributors. Developments in the remote sensing technology and the Geographic Information Systems assist in factual period checking, initial threatening indication and rapid destruction valuation of both drought disasters. In this proposal, the use of remote sensing and GIS for the drought and disaster management is discourse with the help of GIS and remote sensing.