作者简介：顾磊（1991-）,女,重庆人,硕士研究生,主要从事水资源系统工程研究.E-mail:376628750@qq.com
网络出版日期: 2015-07-20
基金资助
国家自然科学基金项目“考虑人类扰动的旱灾危机诊断与应对机制研究”（编号：51379014）;陕西省科学技术研究发展计划项目“多水源供给模式下灌区旱灾诱发危机诊断与预警”（编号：2014KJXX-54）资助
版权
Spatial-temporal Evolution of River Baseflow in Northern Shaanxi
Online published: 2015-07-20
Copyright
陕北地区地下水关系复杂,且与地表水交换十分频繁,给区域水资源评价与利用提出了严峻的挑战。通过估算陕北风沙区高家堡水文站和黄土区高石崖、曹坪水文站的基流量过程,分析了各站基流序列与对应区域的面降水序列的演化趋势及变异驱动关系;研究了其多时间尺度变化特征。结果表明：①风沙区地下水对径流补给量远大于黄土区;②不同地区的河川基流量均显著减少,主要受人类活动驱动;③各站基流量的周期及丰枯变化与其面降水量序列的周期变化在中小尺度上响应较为密切;④风沙区降水—径流关系较黄土区更为不稳定,原因在于其受到地下水蓄滞和侧向补给的影响更显著。在变化环境下的影响,风沙区水循环过程将更趋复杂多变,因此水资源评价中必须考虑地下水的影响。
顾磊 , 张洪波* , 陈克宇 , 俞奇骏 . 陕北地区河川基流的时空演变规律[J]. 地球科学进展, 2015 , 30(7) : 802 -811 . DOI: 10.11867/j.issn.1001-8166.2015.07.0802
The interaction between groundwater and surface water in northern Shaanxi is quite complicated and frequent under the influence of regional hydrogeological condition and human intervention. These performances bring serious challenges to regional water resources assessment and utilization. The river baseflow process at Gaojiabu Station in windy desert region, Gaoshiya and Caoping Station in loess region were taken as research objects, and their variation trends and change points in the river baseflow series were analyzed in this paper. In addition, to explore the cause of the baseflow change, this research compared their correlations with precipitations in the same area respectively from two aspects of flow variation and multitimescale characteristics. The results show that: ①groundwater recharges for river flow in windy desert region significantly exceed those in loess region; ②baseflows of all the rivers in the study area reducing significantly are mainly determined by human intervention such as the extensive pumping of groundwater; ③periodic changes of baseflow in each station response closely to precipitation change on meso-scale and small-scales; ④precipitation-runoff relationships in windy desert regions are much more complicated and unstable than loess region, which is mainly because of its more significant impact from groundwater storage and the lateral recharge change. Under the changing environment, the water cycle in windy desert regions would be in complexity and variability. Therefore, it is recommended that, groundwater changes need to be considered in regional water resources assessment.
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