Annual Variation of Heihe River Runoff during 1957-2008
Annual Variation of Heihe River Runoff during 1957-2008
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发表时间：
2011
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通讯作者：
Guo Qiao
中科院分区：
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作者：
Guo Qiao
根据1950年以来黑河流域2个重点水文控制站逐月实测流量，利用不均匀系数和集中度（周期）研究其年内变化。采用Mann-Kendall检验和累积滤波法检测年内径流变化趋势。结果表明：1)年径流分布总体上在璎珞峡7月达到最大，且曲线呈单峰值。正义峡年径流在5月和11月达到最小，7月和9月达到最大，其曲线有两个山谷； 2）径流不均匀性和集中度在1950年代达到最大，2000年代达到最低。最大径流量出现在璎珞峡7月。正义峡径流不均匀性和集中度在1990年代和2000年代达到最大，而在1960年代则达到最低。最大径流出现在8月和12月； 3) 璎珞峡月径流量自1957年以来除7月份外呈增加趋势,而正义峡除9月份外月径流量呈下降趋势。
Based on the observed monthly streamflow of 2 key hydrological control stations in Heihe River Basin since 1950, by using nonuniformity coefficient and concentration degree (period) ,we studied the intra-annual change. The Mann-Kendall test and the cumulative filter methods were employed to detect the trends of intra-annual runoff. The results indicate that: 1) Generally, the annual runoff distribution reached a maximum in July at Yingluoxia, and the curve of it had a single peak value. At Zhengyixia the annual runoff reached the minimum in May and November and reached the maximum in July and September, and the curve of it had two valleys; 2) the inhomogeneity and concentration degree of the runoff in the 1950s reached the maximum, while those in the 2000s hit the lowest. The maximum runoff appeared in July at Yingluoxia. At Zhengyixia the inhomogeneity and concentration degree of the runoff in the 1990s and 2000s reached the maximum, while those in the 1960s hit the lowest. The maximum runoff appeared in August and December; 3) the monthly runoff at Yingluoxia presented an increasing trend since 1957 except in July, but at Zhengyixia the monthly runoff had a descending trend except in September.