黄河上中游区径流量格局长期变化过程

发布时间：2018-04-14 12:15

本文选题：径流 + 变化趋势　；参考：《水土保持研究》2017年03期

【摘要】：河川径流不仅是水资源重要的构成部分,也是自然界中水分循环的重要环节,径流量的变化直接影响区域特别是干旱区水资源的开发利用。基于黄河中游上中下三个站点(河口镇站、吴堡站以及三门峡站)1919—2013年月径流量资料,采用Spearman相关法、有序聚类法等方法分析黄河不同区间年、月径流量演变规律,揭示年径流量突变前后径流量年内集中度和不均匀性差异。结果表明:黄河上游和中游径流量因人类活动作用具有明显趋势性减小,而因气候作用表现出显著的阶段性。在径流量突变年份后,黄河上游径流量上游集中度降低,不均匀度减小,径流量年内分配趋于均匀,但黄河中游地区径流量年季不均匀性反而增大。
[Abstract]:River runoff is not only an important component of water resources, but also an important link of water circulation in nature. The change of runoff directly affects the development and utilization of water resources in the region, especially in arid areas.Based on the monthly runoff data from 1919 to 2013 at three stations (Hekou Town Station, Wubao Station and Sanmenxia Station) in the middle reaches of the Yellow River, Spearman correlation method and orderly clustering method are used to analyze the evolution of the monthly runoff in different regions of the Yellow River.The difference of concentration and heterogeneity of annual runoff before and after abrupt change of annual runoff was revealed.The results show that the runoff of the upper and middle reaches of the Yellow River decreases obviously due to human activities, while the climatic action shows a significant phase.After the abrupt runoff year, the concentration degree and uneven degree of the upstream runoff decreased, and the distribution of runoff tended to be uniform, but the annual inhomogeneity of runoff increased in the middle reaches of the Yellow River.
【作者单位】：西北农林科技大学水利与建筑工程学院;西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院水利部水土保持研究所;
【基金】：国家重点研发计划“黄河流域水沙多时空演变及其分异规律”(2016YFC0402240701)
【分类号】：P333

【相似文献】