摘要
通过对涝渍连续动态控制排水指标的模拟试验研究，提出了涝渍连续抑制天数指标ＣＳＤＩ和涝害权重系数ＣＷ的概念及其求解方法；并建立了作物相对产量Ｒｙ与ＣＳＤＩ的关系模型；分析了涝渍分割研究的不足之处和涝渍连续研究的必要性．研究结果表明，棉花相对产量Ｒｙ与地下水连续动态指标ＳＥＷ３０和ＣＳＤＩ均具有良好的线性关系；涝害权重系数ＣＷ是一个随涝渍状态而变的状态变量，说明在涝渍连续情况下，分别用除涝和降渍单项指标确定排水标准与实际情况有一定的出入，而涝渍连续抑制天数指标能够将除涝与降渍作为一个整体，用它来确定排水标准比较合理．
Based on the experiment for drainage index regarding the continuous days of water logging and excessive soil water,the solution for continuous stress day index(CSDI) and weight coefficient of water logging(CW) are proposed and the relationship between relative crop yield and CSDI is established.The study results show that the utilization of CSDI is reasonable in determination of drainage standard.
出处
《水利学报》
EI
CSCD
北大核心
1999年第4期25-29,共5页
Journal of Hydraulic Engineering
关键词
涝害权重系数
排水标准
CSDI
continuous stress day index of water logging and excessive soil water, weight coefficient of waterlogging, drainage standard, experimental study.
