论文部分内容阅读
利用辽宁省凌河流域10个气象站1965-2006年的逐日气象数据,采用FAO推荐的P-M公式计算各站逐日ET0,分析ET0空间分布特征及时间变化趋势,并结合去趋势波动分析法(DFA)探讨流域内ET0的长程相关特征。结果表明:近42 a来,流域内ET0整体表现为中间高两端低,以朝阳和锦州的连线为中心向东西两端递减;各站ET0除阜新不显著(P>0.05)上升外,其余均有极显著(P<0.01)下降趋势,且该趋势将在未来延续下去。本研究结果对凌河流域水资源规划管理和调度具有重要意义。
Based on the daily meteorological data of 10 meteorological stations in Ling River basin of Liaoning Province from 1965 to 2006, daily ET0 of each station was calculated by using the PM formula recommended by FAO. The spatial distribution characteristics and time trend of ET0 were analyzed. Combined with the trend analysis (DFA ) To explore the long-range correlation characteristics of ET0 in the basin. The results showed that in the past 42 years, the ET0 in the basin showed a low mid-height and a decreasing trend at the eastern and western ends centered on the connection between Chaoyang and Jinzhou. ET0 was not significantly increased except Fuxin (P> 0.05) The rest were extremely significant (P <0.01) downward trend, and the trend will continue in the future. The results of this study are of great significance to the planning and management of water resources in Linghe River Basin.