干旱区生态环境知识资源中心(Arid): 近50年泾河流域降雨-径流关系变化及驱动因素定量分析

Arid

	近50年泾河流域降雨-径流关系变化及驱动因素定量分析
其他题名	Variation characteristics of rainfall-runoff relationship and driving factors analysis in Jinghe river basin in nearly 50 years
	郭爱军; 畅建霞; 王义民; 黎云云
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2015
卷号	31 期号:14 页码:165-171
中文摘要	为明确变化环境下流域降雨-径流关系变化特征,定量分析影响因素,该文提出利用滑动偏相关系数法诊断泾河流域降雨-径流关系变异情况,与双累积曲线法相互验证,引入Copula函数分析降雨-径流关系变化特征,在此基础上定量计算气候变化和人类活动对径流变化的影响。研究结果表明:泾河流域降雨-径流关系于1996年发生变异,主要由流域内持续增加的用水量以及大规模的水利水保工程致使的径流衰减性变化造成,降雨年际、年内变幅不明显;降雨-径流关系变异后(1997-2010年),相较1960-1996年,相同降雨条件下流域产流能力减弱,年降雨量≥400 mm时,产流量相对减幅达40%以上;降雨、径流联合分布发生明显变化,不同时段相同量级降雨、径流遭遇概率变化显著;1997-2010年与1960-1996年相比,人类活动对径流减少的贡献率达到80.96%,气候变化影响程度仅为19.04%。该研究可为合理进行流域水资源开发利用与水土保持工作等提供科学依据。
英文摘要	Under the background of changing global environment and frequent anthropogenic activities, rainfall-runoff relationship has suffered tremendous change in many regions of China, particularly in arid and semi-arid regions. The Jinghe River basin (JRB) in the middle of the Loess Plateau, which is the major base of grain production in Shannxi Province, has experienced significant changes in hydro-climatic variables and the relationship between them during the past decades, causing many water resources problems. In this paper, we focused on analyzing the variation characteristics of rainfall-runoff relationship in JRB, and quantitatively assessing the effects of climate changes and human activities on the runoff reduction. It was of great importance for mastering the evolution of hydrological cycle, water resources planning and management, and water and soil conservation in JRB. The monthly rainfall and runoff data were used in the study and summed annually to investigate the variation characteristics in 1960-2010. To detect the change points of rainfall-runoff relationship, the sliding partial correlation coefficients method was proposed and the change points were further confirmed by the double mass curve method. On the basis of the studies, the relative changes of rainfall, runoff, and rainfall-runoff relationship were analyzed around the change points. Moreover, we also introduced the Archimedean Copula function, from the perspective of probability, to analyze the probability of synchronous-asynchronous encounter of rainfall and runoff in JRB. What caused the variation of rainfall-runoff relationship? Climate change or human activities? To figure out this, the method of slope change ratio of cumulative quantity (SCRCQ) was adopted in this paper. According to these results, we obtained the following conclusions: (i) Annual runoff and rainfall presented wavelike decrease change. Nevertheless, annual runoff declined more greatly than rainfall; especially, in some periods annual rainfall increased, however, runoff decreased. This illustrated that some non-rainfall factors caused the occurrence of phenomenon in JRB; (ii) Change points of rainfall-runoff relationship occurred in 1996 validated by the sliding partial correlation coefficients method and double mass curve method. Meanwhile, we could ascertain the conclusion by the evidence of the process of human activities in JRB, which presented the increasing industrial, agricultural and domestic water consumption and large-scale water conservancy and soil conservation projects since 1990s; (iii) To compare the magnitude of the changes of rainfall, runoff and rainfall-runoff relationship, the hydrological variables series were divided into the periods of 1960-1996 and 1997-2010. Compared to runoff and rainfall in 1960-1996, the annual mean runoff and rainfall in 1997-2010 dropped 43.47% and 6.64%, respectively. The change of monthly rainfall had no significance in different periods. On the contrary, monthly runoff decreased more greatly and the difference was smaller in each month i.e. the runoff distribution for each month was more uniform. The correlation between rainfall and runoff diminished and runoff yield decreased under the same rainfall. When precipitation was above 400 mm, the relative change rate of runoff was above 40% in 1997-2010 compared to that in 1960-1996; (iv) The joint distributions of rainfall and runoff constructed by the Archimedean Copula function were different in 1960-1996 and 1997-2010, and the distributions in the 2 periods were fitting Clayton and Gumbel-Hougaard Copula better, respectively.
中文关键词	降雨 ; 流域 ; 气候变化 ; 泾河流域 ; 降雨径流关系 ; Copula函数 ; 定量分析
英文关键词	precipitation watersheds climate change jinghe river basin rainfall-runoff relationship copula function quantitative analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENGINEERING MULTIDISCIPLINARY
WOS研究方向	Engineering
CSCD记录号	CSCD:5486486
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233035
作者单位	西安理工大学, 西北水资源与环境生态教育部重点实验室, 西安, 陕西 710048, 中国
推荐引用方式 GB/T 7714	郭爱军,畅建霞,王义民,等. 近50年泾河流域降雨-径流关系变化及驱动因素定量分析[J],2015,31(14):165-171.
APA	郭爱军,畅建霞,王义民,&黎云云.(2015).近50年泾河流域降雨-径流关系变化及驱动因素定量分析.农业工程学报,31(14),165-171.
MLA	郭爱军,et al."近50年泾河流域降雨-径流关系变化及驱动因素定量分析".农业工程学报 31.14(2015):165-171.