摘要
渭河宝鸡段河道年径流减少,生态基流得不到保障引起社会各界的重视。根据1954-2009年以来的降水、气温以及径流观测数据,分析降水及气温变化变化对渭河径流量的影响。采用相关系数法得到降水与径流的相关系数为0.69,正相关性好,气温与径流的相关系数为-0.73,呈明显负相关。采用降水、气温以及径流累积曲线分析得到,降水减少趋势不明显、年径流量减少趋势明显,以及气温升高趋势明显。分析认为径流减少趋势主要由降水量减少和气温升高所致。此外,1971年和2003年是两个重要突变点,主要原因是宝鸡峡渠首引水和宝鸡峡加坝加闸工程所致。
Reduction in the runoff and ecological basic flow in the Baoji reach of Wei River has attracted a great public attention over recent years. This paper analyzes the effect of changes in precipitation and air temperature on the Wei River runoff, based on the records of these two quantities and the hydrological data of the period 1954 - 2009. Using a correlation coefficient method, we obtained a close correlation 0.69 of runoff with precipitation, and a close but negative correlation 4）. 73 of runoff with air temperature. Trend analysis shows that the precipitation had decreased sligatly, while the runoff had decreased dramatically and the air temperature risen significantly. For the runoff reduction, the main reasons would be precipitation reduction and air temperature rise. The mass curve has two breaking points, one caused by the Baojixia water diversion in 1971, and the other caused by the renovation of dam and gate in this diversion project in 2003.
出处
《水力发电学报》
EI
CSCD
北大核心
2013年第3期71-75,共5页
Journal of Hydroelectric Engineering
基金
国家水体污染控制与治理科技重大专项
渭河水污染防治专项技术研究与示范课题(2009ZX07212-002-003-004)
关键词
水文学及水资源
河川径流
相关系数法
累积曲线
气候变化
渭河
hydrology and water resources
river runoff
correlation coefficient method
mass curve
climate change
Wei River
