【摘要】：利用滄州市南皮生態(tài)農(nóng)業(yè)試驗(yàn)站點(diǎn)2011—2013年不同土層深度的含水率及降雨量和降雨時(shí)間,結(jié)合由植株葉面積指數(shù)得到的不同生育期植株的截留容量,分析了最大容水量S和最大降雨強(qiáng)度二者與降雨有效性的相關(guān)關(guān)系,并在此基礎(chǔ)上建立了次降雨有效降雨的估算模型。結(jié)果表明,土壤初始含水率與降雨有效性線性相關(guān),且在不發(fā)生溢流情況下,可以用土壤最大容水量S作為是否考慮土壤初始含水率折減作用的分界點(diǎn);另外,對(duì)于降雨強(qiáng)度I≥0.7 mm/min的降雨,降雨強(qiáng)度與降雨有效性相關(guān)性顯著,并且隨最大降雨強(qiáng)度的增大,降雨有效性逐漸減小;最后將運(yùn)用傳統(tǒng)模型和新估算模型計(jì)算的有效降雨量值與實(shí)測(cè)有效降雨量值驗(yàn)證對(duì)比,新模型比傳統(tǒng)模型更加貼近實(shí)測(cè)有效降雨,并且降雨量較大時(shí)差別更加明顯。
[Abstract]:Using the moisture content, rainfall and rainfall time of different soil depth from 2011 to 2013, and combining with the interception capacity of different growth stage plants obtained from plant leaf area index, Cangzhou Nanpi Eco-agricultural experiment station from 2011 to 2013 was used. The correlation between maximum capacity S and maximum rainfall intensity and rainfall availability is analyzed, and the estimation model of effective rainfall for secondary rainfall is established. The results showed that the initial soil moisture content was linearly correlated with rainfall availability, and the maximum soil water capacity S could be used as the dividing point to consider the reduction of initial soil moisture content without overflow. In addition, for rainfall with rainfall intensity I 鈮，

本文編號(hào)：2330536