基于TRMM数据的江西省降水时空分布特征分析

Analysis of Temporal and Spatial Distribution Characteristics of Precipitation in Jiangxi Province Based on TRMM Data

对江西省地区降水的时空分布特征进行分析可以为江西水资源利用、灾害预测与农业发展等生态问题提供科学依据。本文使用地统计分析方法对江西省1998—2019年TRMM 3B43 V7降水数据进行时空特征分析。结果表明,(1)江西省降水在空间分布上呈现出东西两侧山区降水多,中部平原地区降水少的特征;(2)江西省年际降水波动大,研究时段内江西省年降水量整体呈现上升趋势;(3)江西省降水量在季节上分布不均匀,全年降水大部分集中于4—7月,且春夏两季的平均降雨量高于秋冬两季降雨量的2倍。

The analysis of temporal and spatial distribution characteristics in Jiangxi Province can provide basis for disaster prediction,local water resources utilization and agricultural ecological development.In this paper,the geostatistical analysis method is used to analyze the temporal and spatial characteristics of TRMM 3B43 V7 precipitation data in Jiangxi Province from 1998 to 2019.The results show that,(1)the spatial distribution of precipitation in Jiangxi Province shows the characteristics of more precipitation in the mountains on the east and west sides and less precipitation in the central plain;(2)The interannual precipitation of Jiangxi Province fluctuates greatly.During the study period,the annual precipitation in Jiangxi Province showed an upward trend;(3)In terms of season,the Precipitation in Jiangxi province is not evenly distributed,with more than half of the rainfall falling from April to July.Moreover,the precipitation in autumn and winter is twice that of in spring and summer.