黄霄.北方典型多沙大凌河水沙演变特征及其影响因素分析[J].水电能源科学,2019,37(1):40-44
北方典型多沙大凌河水沙演变特征及其影响因素分析
Analysis of Characteristics of Water and Sediment Evolution and Its Influencing Factors in the Northern Daling River
  
DOI:
中文关键词:  水沙演变  影响因素  定量分析  大凌河干流
英文关键词:water and sediment evolution  influencing factor  quantitative analysis  main stream of Daling river
基金项目:水利部公益性专项经费项目(201501045);水利部公益性专项经费项目(201601093)
作者单位
黄霄 中工武大设计研究有限公司, 湖北 武汉 430000 
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中文摘要:
      为分析北方典型多沙河流大凌河的水沙演变特征及其影响因素,结合M-K趋势检验法及水文学方法分析了大凌河干流4个主要控制水文站1956~2016年的水沙演变特征,并定量分离和剖析其水沙演变影响因素。结果表明,大凌河干流各站年径流量及输沙量急剧下降,M-K检验值均通过99%的显著性检验,尤其在2000年以后,年水沙递减率更为显著,与1970年代相比,2000~2016年各站年径流递减率在71.38%~80.93%之间,年输沙量递减率在96.02%~99.52%之间,且从上游到下游,水沙递减率呈递增变化;各站水沙累积双曲线突变点均发生在1980年;与基准期(1979年以前)相比,变化期(1980~2016年),人类活动对水沙演变影响要素的贡献率约为75%,降雨影响贡献率约为25%,2000年以后,大规模流域水保措施(退耕还林(草),淤地坝、梯田建设)是大凌河水沙锐减变化的主因。
英文摘要:
      In order to analyze the evolution of water and sediment and its influencing factors in the Daling River, which is a typical sediment-laden River in the north of China, based on the water and sediment data during 1956 to 2016 year of four major controlled hydrological stations in the Daling River, the M-K trend test and hydrology method were selected to analyze the evolution of water and sediment, and its influencing factors were separated and analyzed quantitatively. The results show that the annual runoff and sediment of all stations were dropped dramatically. The test values of M-K were passed the significance test of 99%, especially after 2000 year, the reduction rate of the water and sediment was more significant; Compared with the 1970s, the annual decrease rates of runoff in all stations from 2000 to 2016 ranged from 71.38% to 80.93%, and the annual sediment reduction rates ranged from 96.02% to 99.52%. From the upstream to the downstream, the decreasing rates of water and sediment showed an upward trend. The sudden change point of the double mass curve of runoff and sediment occurred at the 1980 year for four stations. Compared with the reference Period (before 1979 year) and the change period (1980-2016 year), the contribution rate of human activities to the influencing factors of water and sediment evolution was about 75% and rainfall contribution rate was 25%. After 2000, the large-scale water conservation measures (conversion of cropland to forest (grassland) and construction of the check dam, terraced field) are the main causes of the sharp decrease of water and sediment in Daling river.
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