Temporal and Spatial Variation Characteristics Analysis of Precipitation Days and Intensity over the Wujiang River Basin in Flood Season

Abstract

Wang, J.; Peng, T., and Shen, T., 2019. Temporal and spatial variation characteristics analysis of precipitation days and intensity over the Wujiang River Basin in flood season. In: Guido-Aldana, P.A. and Mulahasan, S. (eds.), Advances in Water Resources and Exploration. Journal of Coastal Research, Special Issue No. 93, pp. 209–219. Coconut Creek (Florida), ISSN 0749-0208.Based on the observation data of 41 surface meteorological stations in Wujiang River Basin from 1960 to 2016, the temporal and spatial variation laws of precipitation days and intensity in flood season (May to September) in Wujiang River Basin are analyzed. It is found that the distribution of precipitation in Wujiang River Basin is characterized by inhomogeneity of spatial change and tendency of temporal change. In terms of spatial distribution, affected by geographical position and topography, Wujiangdu is regarded as the boundary in terms of latitude. From the topographic point of view, because of the terrain in the vicinity of high mountains, precipitation frequency and value are larger, and precipitation also has a good correlation with the spatial distribution of temperature, humidity and wind speed; in the time variation, the frequency of rain days has an upward trend while the corresponding average precipitation is declining. The proportion of heavy rain days is decreasing while the corresponding average precipitation is increasing, and the relative humidity is decreasing. The surface air temperature is on the rise while the wind speed is on a fast downward trend.