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Spatial and Temporal Analysis of Rainfall Variation in Yadalavagu Hydro-geological unit using GIS, Prakasam District, Andhra Pradesh, India

Author Affiliations

  • 1 Department of Geology, Acharya Nagarjuna University, Guntur, Andhra Pradesh, INDIA

Int. Res. J. Environment Sci., Volume 4, Issue (4), Pages 30-35, April,22 (2015)


Rainfall is the one of the most important factor in hydrological cycle as well as climate elements. Amount of rainfall received over an area affects the availability of water resources and cropping pattern of an area. Therefore the present study deals with the rainfall characteristics of the Yadalavagu sub basin of Prakasam district. The analysis includes the seasonal and special variations of rainfall within a basin through different seasons. Six rain fall measuring stations have been established at Chennareddypalli, Buddapalli, Markapur, Bodapapdu, Mannevaripalli and Moddpulapalli of Markapur and Tarlupadu mandals of Prakasam districts, Andhra Pradesh; which has mean rainfall about 612.7 mm. First shower of the rainfall starts in second week of the June. Highest rainfall 885.3 mm recorded in 2005-06; whereas lowest 364 mm is recorded in 2011-12. 52 Percent and 40 percent of the rainfall received in south west monsoon as well as north east monsoon period respectively where as in summer season only 8 percent of the rainfall received. North east part of the hydro-geological unit has received highest rainfall and the foot hill area of Veligonda hill ranges received lowest rainfall.


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