论文部分内容阅读
在干旱区研究分析流域径流量的变化特征,是流域管理的重要科学问题。利用1964—2012年艾比湖流域博尔塔拉河径流、降水数据,采用变异系数、集中度和集中期等指标,对艾比湖流域博尔塔拉河的径流量、降水量在多时间尺度上进行分析,并用集中期来反映径流对降水变化的响应。结果显示,博尔塔拉河径流年际变化较平稳,增长趋势不明显;流域径流主要集中在6—8月,季节上主要集中在夏季。径流集中期主要集中在6月下旬至7月中旬之间。降水集中期主要集中在5—7月;年降雨和年径流间存在较高的相关关系,(r=0.2372>0.23292=R0.1,49,回归显著水平超过0.1),径流对降水具有滞后效应,多年平均滞后时间为21d左右,且滞后天数随着时间推移呈缩小趋势。
Studying and analyzing the changing characteristics of runoff in arid areas is an important scientific issue of watershed management. Based on the Bortala River runoff and precipitation data in the Aibi Lake Basin from 1964 to 2012, the runoff and precipitation of the Bortala River in the Aibi Lake Basin were measured with the indexes of variation coefficient, concentration and concentration. Scale analysis, and use the concentration period to reflect the response of runoff to precipitation changes. The results show that the interannual variation of runoff in the Bortala River is relatively stable and the growth trend is not obvious. The runoff in the Bortala River mainly concentrates in June-August, while the season mainly concentrates in summer. The concentration of runoff mainly concentrated in late June to mid-July. The precipitation concentration period mainly concentrated in May-July. There was a high correlation between annual precipitation and annual runoff (r = 0.2372> 0.23292 = R0.1, 49, and the regression significant level exceeded 0.1), and the runoff had a lagging effect on precipitation , The average lag time of many years is about 21d, and the number of lag days shows a decreasing trend with time.