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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water resources and hydroinformatics : Wet and dry spell characteristics of semi-arid region, western maharashtra, india
Wet and dry spell characteristics of semi-arid region, western maharashtra, india
Author : Kamalkishor R. Atal1 and Abhijit M. Zende2
Abstract
For successful agricultural management and planning of soil and water conservation measures it is necessary to know the sequence of dry and wet periods along with onset and withdrawal of rainy season. Daily observed rainfall (1998-2013) are analyzed to compare and contrast the largescale duration characteristics of rainfall over semi-arid region. Defining a wet (dry) spell as the number of consecutive days of rain above (below) a prescribed threshold, we find that the distributions of wet (dry) spells appear to exhibit universality in the following sense. Interestingly, the behavior that we observed for the wet spell duration is reversed in the dry spell characteristics. In other words, the main contribution to the dry part of the season appears to come from 7 day dry spells in the rainy regions. This paper analyses the trend of rain spell frequency in terms of duration by using standard statistical methods. The analysis has been carried out for ten locations, namely Dahiwadi, Islampur, Kadegaon, Karad, Koregaon, Miraj, Palus, Tasgaon, Vaduj and Vita in the Yerala River basin. In the Yerala river basin, the duration of dry and wet spell varies from 4 days to 33 days. In this study, the rain spells were classified into low, medium, high, very high and extreme rain spells. Some of the important results have been found through the analysis of this study. These are; the spells were examined only for the monsoon season (June-October) because all the above categories of rain spells occur only in this season. The rain spells which helps to co-ordinate various activities like water release schedule, supplementary irrigation, effect on crop growth etc. The maximum dry spell was 33 days at Palus in 2002 and minimum 17 days at Kadegaon in 2003.
File Size : 508,838 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water resources and hydroinformatics
Date Published : 18/08/2015
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