摘要
根据南渡江干流福才、龙塘水文站1959-2018年共计60a的月实测径流资料,运用统计学分析法、目估适线法、Mann-Kendall法及滑动t-检验对其径流特征、长期分布及变化趋势进行研究与分析。结果表明:南渡江干流径流年内分配相对集中,汛期(5-10月)径流量占全年径流总量约80%,流域汛期防洪任务重;南渡江流域在1986年后,流量呈现不显著的下降趋势;自1959年来,年均流量变化较为平缓,未出现突变点,受人类活动影响不大。
Based on the monthly measured runoff data of Fucai Hydrological Station and Longtang Hydrological Station on the main stream of Nandu River,over 60 years from 1959 to 2018,this paper analyzes its runoff characteristics,long-term distribution pattern and change trend by scientific research methods including statistical analysis,curve-fitting method by observation, Mann-Kendall method and slide t-test.The results show that:①the annual runoff along Nandu River mainly occurs on flood seasons from May to October,which accounts for 80% of its yearly runoff volume,thus bringing a daunting task on flood control;②Nandu River has seen an insignificant declining on its amount of runoff after 1986,with steady change of annual average runoff since 1959 and without any presence of abrupt change point,which indicates that it has not been significantly affected by human activities.
作者
陈晓璐
林建海
CHEN Xiaolu;LIN Jianhai(Hydrology and Water Resources Survey Bureau of Hainan Province,Haikou 570203,China;Hainan Survey & Design Research Institute for Water Resources and Hydropower,Haikou 570203,China)
出处
《人民珠江》
2019年第10期14-20,共7页
Pearl River
