Spatial and Temporal Distribution Characteristics of Precipitation in Different Seasons in Heilongjiang Province from 1954 to 2013

Abstract

This paper intends to provide data as reference basis for Heilongjiang Provinces’ optimization of precipitation forecast and the resource allocation. The precipitation characteristics of Heilongjiang Province from 1954-2013 (60 years) were studied by Mann-Kendall rank order correlation test, mutation test, linear trend analysis, and Kriging interpolation combined with GIS analysis. The results show that the overall trend of precipitation in Heilongjiang Province from 1954 to 2013 was decreasing, but the results of segmental analysis show that the trend has been increasing since 1980, and the spatial distribution was characterized by high in the east and low in the west, with the precipitation center in the middle; the seasonal average precipitation gradually increased from east to west, and the precipitation was mainly concentrated in summer, accounting for 63.47% of the year. The annual precipitation was mainly light rainfall, but the difference with the medium rain was not large, both about 35%.