秦岭南北典型流域径流特征及其降水变化响应

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英文篇名：Characteristics of Runoff and Its Responses to Rainfall Change in Typical Basins of Northern and Southern Regions of Qinling Mountains 作者：张晓龙 ; 黄领梅 ; 沈冰 英文作者：ZHANG Xiao-long;HUANG Ling-mei;SHEN Bing;State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area,Xi'an University of Technology; 关键词：秦岭南北 ; 径流 ; 特征 ; 降水变化 ; 月河流域 ; 灞河流域 英文关键词：Northern and Southern Regions of Qinling Mountains;;runoff;;characteristics;;rainfall change;;Yuehe Basin;;Bahe Basin 中文刊名：SDNY 英文刊名：Water Resources and Power 机构：西安理工大学西北旱区生态水利工程国家重点实验室培育基地; 出版日期：2015-01-25 出版单位：水电能源科学 年：2015 期：v.33;No.173 基金：国家自然科学基金重点项目(50939004);; 陕西高校省级重点实验室科研项目(12JS067) 语种：中文; 页：SDNY201501003 页数：4 CN：01 ISSN：42-1231/TK 分类号：17-20

摘要

为探索秦岭南北典型流域径流特征及其降水变化响应,选择月河流域和灞河流域为典型流域,根据两流域干流站1960~2010年逐月径流资料,用距平累积法、非参数Mann-Kendall法和R/S分析法等方法对年代际、月尺度径流特征进行对比分析,并考虑年内降水变化,建立降水径流关系模型,定量分析降水变化和人类活动对径流的贡献率。结果表明,两流域径流具有较高的相关性,趋势变化规律大体一致,径流系数基本相同;径流年际变化中径流深接近,均呈震荡下降趋势,且灞河流域下降趋势更明显;年代际变化均呈W型,突变点均在1985~1987年之间,灞河流域通过显著性检验;灞河流域径流年内分配比月河流域更平均,灞河流域年内径流呈双峰型,月河流域径流年内变化呈单峰型;随着时间尺度的降低,两流域径流相关性降低。
        Taking Bahe Basin and Yuehe Basin in the northern and southern regions of the Qinling Mountains as typical basins,the characteristics of runoff and its causes have been explored.On the basis of monthly runoff data of the two river trunk stream hydrometric stations from 1960 to 2010,this paper applies the departure accumulation,the Mann-Kendall statistical method and R/S analysis method to compare and analyze the characteristics and the trend in change of runoff in the basins.In view of the rainfall inner-annual changes,rainfall runoff relational model is developed.And then the impacts of rainfall change and human activities on the runoff have been evaluated quantitatively.The results indicate that the runoff in the Yuehe Basin is closely associated with the runoff in the Bahe Basin,the change trend and runoff coefficients are both identical basically.The runoff depth of the two basins is nearly the same and has a trend of shock downward,which Bahe Basin appears the sharper downward trend.And the downward trend of runoff will last longer over the next years.Analyses of the interdecadal changes of the two basins show that runoff variations has displayed W-type trend.The Mann-Kendall test is conducted and the results show that there exist sudden changes from 1985 to 1987,but only Bahe Basin passes significance test.The annual distribution of runoff in the Bahe Basin is more balance,which is the double-peak contour.But the annual distribution of runoff in the Yuehe Basin is unimodal contour.With the decrease of the time scale,the two basins runoff correlation reduced.

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