| 黄河下游河流纵剖面平行抬升的统计检验 |
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| 引用本文： | 贾绍凤.黄河下游河流纵剖面平行抬升的统计检验[J].地理研究,1994,13(2):1-10. |
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| 作者姓名： | 贾绍凤 |
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| 作者单位： | 1. 中国科学院地理研究所;2. 国家计划委员会地理研究所 |
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| 摘 要： | 河流纵剖面变化可视为随机过程,它既包括趋势成分,又包括周期成分和随机成分。以前用一时段内的纵剖面升降分布来判断是否具有趋势性平行抬升的方法存在问题。因为这种时段纵剖面升降分布所包含的随机成分很大,不能用以直接判断纵剖面的趋势变化特征。对黄河下游纵剖面的趋势变化比随机变化低两个数量级的情况,更是如此。获得纵剖面趋势变化特征信息的好方法是滑动平均。另外,还可以用统计学方法进行检验。如果纵剖面确为平行抬升;则应有下列结论成立:1)各断面多年平均水位升高值(或河床升高值)相等;2)任意两断面间的高程差都为常数。本文对此进行了统计检验,并得出了在一定的精度要求内,黄河下游河流纵剖面确有平行抬升的趋势的结论。
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| 关 键 词： | 黄河下游 河流纵剖面 平行抬升 统计检验 |
| 收稿时间： | 1992-09-03 |
| 修稿时间： | 1993-10-21 |
ON THE STATISTICAL TEST OF THE PARALLEL RAISING OF THE PROFILE OF THE LOWER REACH YELLOW RIVER |
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| Jia Shaofeng.ON THE STATISTICAL TEST OF THE PARALLEL RAISING OF THE PROFILE OF THE LOWER REACH YELLOW RIVER[J].Geographical Research,1994,13(2):1-10. |
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| Authors: | Jia Shaofeng |
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| Institution: | The Institute of Geography, Chinese Academy of Sciences and State Planning Commission |
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| Abstract: | The raising of river profile can be regarded as a stochastic process.The parallel raising of river profile means that the trend in the process is parallel.Whether the profile raising is parallel or not should be decided according to its trend raising and should not be judged according to its total or random raising,MA(moved average)model can be used to obtain the information of the trend raisong of the river profile.If the raising of profile is parallel,there will be following situations:1.The difference of water levels between two sites along the profile should be a constantu;2.The mean value of the annual raising of water levels at all sites along the profile should be equal.All these propositions are examinated by using statistical test methods(stutend test).Such conclution is obtained that the trend raising of the profile of the lower reach Yellow River is parallel(from Huayuankou to Lijin). |
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| Keywords: | Lower Reach Yellow River river profile parallel raising statistical test |
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