[1]WANG Xiaoning,YUE Dapeng,ZHAO Jingbo,et al.Temporal and Spatial Variations and Disaster Effect of Extreme Precipitation from 1958 to 2017 in Heilongjiang Province[J].Research of Soil and Water Conservation,2020,27(05):138-146.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 05
Page number:
138-146
Column:
目次
Public date:
2020-08-20
- Title:
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Temporal and Spatial Variations and Disaster Effect of Extreme Precipitation from 1958 to 2017 in Heilongjiang Province
- Author(s):
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WANG Xiaoning1, YUE Dapeng1, ZHAO Jingbo1,2, SU Min1, WANG Daju1
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(1.School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China)
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- Keywords:
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extreme precipitation; temporal and spatial variations; precipitation mutation; periodic regularity Heilongjiang province
- CLC:
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P426
- DOI:
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- Abstract:
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According to the daily precipitation data of 30 meteorological stations in Heilongjiang Province during period from 1958 to 2017, linear trend analysis, Man-Kendall mutation test, Kriging interpolation method and wavelet analysis were used to detect the temporal variation such as annual changes, mutation and cycle rules and spatial characteristics of 9 selected extreme precipitation indices in Heilongjiang Province. The conclusions are as follows.(1)In terms of time series, the continuous dry period decreased significantly at the rate of 2.52 d/dacade, the precipitation intensity showed a small downward trend, the other indices showed an upward trend and the annual precipitation increased significantly at the rate of 1.81 d/decade. The major mutations of most indices occurred in the late 1970s and the changes were cyclical, the main period of each index was around 20 years, corresponding to the periodic changes.(2)In terms of spatial variation, the spatial difference of multi-year average values of each index was significant. The precipitation in the middle and south of the study area was more than that in the northwest, but the precipitation intensity in the west was larger.(3)In the central Yichun, Tieli and southern Shangzhi areas, the possibility of rainstorm and floods was higher than other areas. In the west of Heilongjiang Province, the trend of drying was obvious, and drought and gale occurred readily.