Assessment on spatial extent of arid and semi-arid climatic zones of India using GIS

Nisha Sahu Nisha Sahu,S K Singh S K Singh,G P Obi Reddy G P Obi Reddy,Nirmal Kumar Nirmal Kumar,B Dash B Dash

doi:10.54386/jam.v23i2.66

Nisha Sahu Nisha Sahu, S K Singh S K Singh + Show 3 more

Open Access

https://doi.org/10.54386/jam.v23i2.66

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Abstract

 In this study, a quantitative assessment of spatial extent of arid and semi-arid climatic zones of India was performed for the period from 1988 to 2018 using potential evapo-transpiration (PET) calculated by Modified Penman Method, estimated from global climate data sets. Climatic water balances computed for 625 stations across the country are used for classifying to bio-climate types based on moisture index and areas falling under arid climatic zones in India are delineated using ArcGIS 10.5. It was noticed a considerable changes in the country’s arid and semi-arid climatic zones between the two periods; 1992 and 2018. Overall, there has been a net percent change in hyper arid, typic arid and semi arid (dry) areas is 5.62, 1.62 and 7.17 percent, respectively. Dryness and wetness are increasing in different parts of the country. There is also change in rainfall, PET and moisture index over a period of time which is vital to determine aridity pattern of any region. Thus, results are of great significance for studying the assessment of temporal and spatial dry climatic water balance of India, which can help immensely in the management of water resources and sustainability of crop production under changing climatic conditions.

Highlights

An agro-ecosystem is a complex entity comprising a number of elements which interact with one another to form and stabilize the system
Results are of great significance for studying the assessment of temporal and spatial dry climatic water balance of India, which can help immensely in the management of water resources and sustainability of crop production under changing climatic conditions
The Third Assessment Report (TAR) of the Intergovernmental Panel on Climate Change (IPCC) reaffirms that the climate is changing in ways that cannot be accounted by natural variability and Global warming is happening

Summary

Introduction

An agro-ecosystem is a complex entity comprising a number of elements which interact with one another to form and stabilize the system. There has been a net percent change in hyper arid, typic arid and semi arid (dry) areas is 5.62, 1.62 and 7.17 percent, respectively. There is change in rainfall, PET and moisture index over a period of time which is vital to determine aridity pattern of any region.

Results

Conclusion