Analysis on precipitation variation characteristics of Xiangyang River Basin during 1979-2014

Abstract

This paper selects Xiangyang Han River area as the research object, based on nearly 36 years of rainfall data during 1979-2014 through the MK trend test, precipitation concentration degree, frequency statistics, statistical method analysis, Xiangyang part of Hanjiang River Basin rainfall characteristics. Results show that in Xiangyang years precipitation was not significant downward trend, precipitation concentration degree is high, mostly concentrated in May to September rainy season, flood and non flood season precipitation concentration degree is high and the precipitation in flood season for many years was not significantly decreased. On the whole, the precipitation in Xiangyang is relatively abundant, but the distribution is uneven and the water supply resource management and control can bring great pressure, so it can be combined with relevant measures to strengthen the water resources.