IMPACT OF CLIMATE VARIABILITY ON IRRIGATION REQUIREMENT-A DETAILED STUDY FOR THE STATE OF KARNATAKA

MALLAPPA J. MADOLLI¹*
¹Department of Hydrology, Indian Institute of Technology, Roorkee, 247667, India
* Corresponding Author : mallappa495@gmail.com

Received : 19-04-2016     Accepted : 30-04-2016     Published : 01-09-2016
Volume : 8     Issue : 31       Pages : 1657 - 1660
Int J Agr Sci 8.31 (2016):1657-1660

Keywords : Crop water requirement, Climate variability, SPI, Karnataka
Academic Editor : Basavraj
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

The study is carried out to examine the climate variability and its impacts on agricultural water resources to achieve the stable and sustainable crop-water management and minimize its effects. Monthly district-wise SPI analysis revealed that both increase and decline in precipitation amount as well as there is a varying tendency in the number of dry and wet years observed in the study area in the last twelve years (2001-2012). Analysis of water requirement of different crops at zonal-wise showed that there is significant of impact of climate variability in the study area and it is heterogeneous in nature. In the Northern dry zone irrigation requirement (IR) is increased by 107.9, 33.1 and 314.4% for the cotton, ground nut and maize crops respectively. The climate variability has positive effect in terms of IR on four zones of study area such as Eastern dry zone, North eastern transition zone, Central dry zone and North eastern dry zone.