【摘要】 采用特征值统计分析和线性趋势方法对海河流域2006—2018年的降水资料进行分析,得出海河流域近13 a降水主要集中在6—9月,其中7月降水量最大、1月降水量最小。根据逐月降水时间序列图分析,发现海河流域1、4、7、10、11月降水量呈现增加趋势,而3、5、6、9、12月降水量呈现减少趋势。根据季度降水时间序列图分析,发现海河流域近13 a夏季降水量呈现明显增加趋势,秋季降水量呈现微弱增加趋势,春季和冬季降水量呈现微弱减少趋势。该趋势分析结果可为今后海河流域降水径流预测、水资源优化配置和防洪减灾提供参考。更多还原

【Abstract】 This paper applies eigenvalue statistical analysis and linear trend method to analyze the precipitation data of the Haihe River Basin from 2006 to 2018. It is concluded that the precipitation in the Haihe River Basin in the past 13 years mainly happens in June to September,among which the amount in July is the largest while the amount in January is the minimal. According to the analysis of the time series diagram of monthly precipitation,it is found that the precipitation in January,April,July,October and November in the Haihe River Basin shows an increasing trend in the past 13 years while the precipitation in March,May,June,September and December shows a decreasing trend. According to the analysis of the seasonal precipitation time series chart,it is found that the summer precipitation in the Haihe River Basin shows a significant increasing trend in the past 13 years;the autumn precipitation shows a slight increasing trend;the spring and winter precipitation shows a slight decreasing trend. The result of the analysis can provide references for the prediction of precipitation and runoff,the optimal allocation of water resources and flood control and disaster mitigation in the Haihe River Basin.更多还原