摘要
为分析穆棱河流域上游径流年内分配特征,根据穆棱河干流上游主要控制站——梨树镇水文站1962～2009年逐月天然径流资料,在分析该站径流年内分配变化过程及比例的基础上,采用不均匀系数、完全调节系数、集中度、集中期和绝对变化幅度等指标研究了该站径流年内分配特性,以Man-Kendall检验法和R/S分析法探讨了该站各月径流及其年内分配特征分析指标变化趋势。结果表明,径流年内分布呈"单峰型",径流主要集中在4～10月,占全年径流量的94.9%;最大月径流量出现在5～8月,占全年径流量的19.4%～33.7%;21世纪初的春、冬季径流量偏丰,其余各季径流量偏枯;21世纪初的CV、Cr、Cd和D基本为各年代最大值,ΔR小于多年均值,径流年内分配最不均匀、最集中;CV、Cr、Cd和D在现在和未来均为不显著增加趋势,径流年内分配将更不均匀、更加集中;加之,全年来水减少、汛期来水增加,不利于区域水资源开发利用。可通过地表水、地下水和再生水优化配置,保障流域经济社会良性发展。研究成果对合理开发和利用区域水资源具有一定指导意义。
Taking the Muling river as the research area,according to the monthly runoff data from 1962 to 2009of the Lishuzhen station which is the main-control hydrological station located in the upstream of the Muling river,based on the distribution processes and ratios of the intra-annual runoff,the unevenness coefficient,completely regulation coefficient,concentration degree,concentration period and absolute variation amplitude are used to study on the variation regularity of the intra-annual runoff distribution.And then the change trends of the monthly intra-annual runoff and its distribution characteristic analysis indicators are obtained by using the Man-Kendall trend test method and R/S analysis method.The results show that the intra-annual runoff distribution pattern is unimodal,the runoff is mainly concentrated in these months which are from April to October,accounting for 94.9% of the whole year’s runoff.The largest monthly runoff occurs from May to August,accounting for 19.4%-33.7%of the whole year’s runoff.At the beginning of the 21 st century,the runoff in Spring and Winter is very abundant,and the runoff in other seasons is partial;The unevenness coefficient,completely regulation coefficient,concentration degree,concentration period are almost the maximum,and the absolute variation amplitude is less than the mean,the intra-annual runoff distribution is the most uneven and concentrated.At the same time,the increasing trends of the unevenness coefficient,completely regulation coefficient,concentration degree,concentration period are not significant at present and in the future,and the intra-annual runoff distribution will be more uneven and concentrated in the future.In addition,the annual runoff is decreasing and the runoff is increasing during the flood season,which is not conducive to the development and utilization of regional water resources.It can optimize the allocation of surface water,groundwater and reclaimed water to ensure the benign development of economic and social development.The research has certain guiding significance for rational development and utilization of regional water resources.
作者
曹振宇
CAO Zhen-yu(Heilongjiang Provinee Water Conservancy and Hydropower Investigation, Design and Research Institute,Harbin 150080,China)
出处
《水电能源科学》
北大核心
2019年第1期21-25,共5页
Water Resources and Power
关键词
径流
年内分配
变化规律
穆棱河流域
runoff
intra-annual distribution
variation rules
Muling river basin
