摘要
利用湘江一级支流蒸水流域控制站神山头水文站近50a的径流量实测数据和流域内及邻近的7个气象站同期日降水观测数据,应用Mann-Kendall趋势检验和突变分析、距平累积曲线、双累积曲线等方法分析了1961—2012年蒸水流域径流量和降水量变化的趋势性及阶段性,定量评价了降水和人类活动对流域径流量变化的影响程度。结果表明:蒸水流域径流量和降水量变化阶段性明显,都经历了枯水期和丰水期2个时期;年径流量和年降水量整体呈上升趋势,但径流量上升趋势较降水量更为显著,径流量的突变年份为1988年,降水量的突变年份为1991年,突变年份之后在降水和人类活动的共同影响下径流量明显增大,人类活动对径流量增大的贡献率为75.74%,降水对径流量增大的贡献率为24.26%。目前人类活动是蒸水流域径流变化的主要影响因素,人类可以通过合理的活动在一定程度上调节径流量。
The trends and stages of runoff and precipitation in Zhengshui River watershed,a first-grade tributary of Xiangjiang River,in the past five decades(1961-2012)were analyzed using methods of Mann-Kendall test,accumulated anomaly curve,and double mass curve.The influences of precipitation and human activities on runoff change were also quantified.The data came from observed runoff at Shenshandou hydrometric station and observed daily precipitation at seven adjacent meteorological stations in the Zhengshui River watershed.Research findings demonstrated that the variations of annual runoff and annual precipitation in the Zhengshui River watershed are apparently staged into low-flow period and high-flow period.In general,both annual runoff and annual precipitation were rising,of which the former increased more evidently.Runoff changed abruptly in 1988,while precipitation in 1991.After the abrupt change,runoff climbed obviously under the combined action of precipitation and human activities,of which the former contributed 24.26%of the increment,whereas the latter contributed up to 75.74%.As the major influential factor of runoff change in the Zhengshui River watershed at present,human activity,to be specific,rational human activity,could adjust runoff.
作者
罗兰花
谢红霞
宁迈进
张敏
贺红士
李亚平
LUO Lan-hua;XIE Hong-xia;NING Mai-jin;ZHANG Min;HE Hong-shi;LI Ya-ping(College of Resources and Environment,Hunan Agricultural University,Changsha410128,China;Hydrology & Water Resources Bureau of Hunan Province,Changsha410007,China;School of Natural Resources,University of Missouri-Columbia,Columbia,MO 65211,USA)
出处
《长江科学院院报》
CSCD
北大核心
2019年第8期42-48,共7页
Journal of Changjiang River Scientific Research Institute
基金
湖南省水利科技项目(湘水科计[2017]230-34)
国家自然科学基金项目(41371184)
湖南省教育厅科研项目(13C386)
湖南农业大学大学生研究性学习和创新性试验计划项目及科技创新资助项目(SCX1816)
