渭河关中段水文情势改变程度分析
Hydrologic Alteration Analysis in the Guanzhong Reach of the Weihe River
查看参考文献30篇
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文摘
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利用林家村、魏家堡、咸阳、临潼和华县5个水文站资料,借助有序聚类分析法检测渭河流域关中段流量突变点,并在此基础上采用变化范围法(RVA)分析渭河流域关中段的水文情势改变程度,定量评价变化程度较高的水文参数。突变点分析表明,渭河关中段径流在1986年发生突变,可以认为1958—1985年水文情势受人类活动影响较小,近似天然状态。对1986年前后两个时期的水文情势进行对比分析,结果表明,5个水文站中不同的水文参数改变程度不同。总体来看,5个站点的水文情势均发生较为显著的改变,其中林家村、魏家堡和咸阳3个站点差异最显著,主要是受宝鸡峡引渭工程的影响。通过对人类活动影响前后水文情势对比分析,更加深入了解目前渭河水文情势状况,为进一步计算生态基流提供科学依据。 |
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其他语种文摘
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The Guanzhong Reach is the center of Weihe River Basin,and ecosystem has been disturbed greatly,which impact the economic development in this area.Flow data at Linjiacun,Weijiabao,Xianyang,Lintong and Huaxian stations of the Weihe River are analyzed in this paper,which are the most important stations in the Guanzhong Reach of the Weihe River.Change points are detected by using Sequential Cluster Analysis.Based on the change point analysis,the degrees of hydrologic alteration are analyzed by RVA(Range of Variability Approach) method,and hydrologic parameters that have altered greatly are determined.Results show that the change points are detected in 1986.It implies that the hydrologic regime before 1986 may be more close to natural state,while the hydrologic regime after 1986 has changed greatly because of intense human activity.Supposed that the hydrologic series before 1986 represents the hydrologic regime of pre-impact period,and that after 1986 for post-impact period.According to range of variability analysis,different hydrologic parameters show different alterations.On the whole,the hydrologic regime at five stations has changed obviously,especially that at Linjiacun,Weijiabao and Xianyang stations.These analyses facilitate understanding of hydrologic alteration in the Weihe River,and may be helpful for estimation of environmental flow. |
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来源
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自然资源学报
,2012,27(7):1124-1137 【核心库】
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关键词
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变化范围法
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水文情势
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突变点
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水文改变程度
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地址
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北京师范大学水科学研究院, 水沙科学教育部重点实验室, 北京, 100875
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-3037 |
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学科
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地球物理学 |
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基金
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国家水体污染控制与治理科技重大专项
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科技部中瑞国际合作项目
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文献收藏号
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CSCD:4590060
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30
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