水科学进展2017，Vol.28Issue(4)：534-542,9.DOI:10.14042/j.cnki.32.1309.2017.04.007
考虑薄膜水的利用介质粒度分布获取水土特征曲线的方法
Predicting the soil-water characteristic curve from soil particle sizedistribution considering the film water
摘要
Abstract
Predicting soil water characteristic curve (SWCC) from particle size distribution was an easy, rapid and economical method.However, the traditional estimate of water content in this method didn′t consider the adsorbed water films, which led to an underestimate of water content in the dry range of the SWCC.In this study, a modified method was developed to take the film water into account when estimating water content, and subsequently the SWCC was predicted by combining water content with the matric suction which estimated by the method in HP model and MV model.The modified model was tested on seventeen soil samples, selected from the UNSODA database.The results illustrated that the modified model significantly improved the model performance in the dry range of the SWCC and accurately estimated the SWCC of sand.Furthermore, the modified model was also applicable for loam and clay by introducing a parameter β.关键词
水土特征曲线/粒度分布/薄膜水/毛细水Key words
soil-water characteristic curve/particle size distribution/film water/capillary water分类
农业科技引用本文复制引用
程东会,常琛朝,钱康,杨红斌..考虑薄膜水的利用介质粒度分布获取水土特征曲线的方法[J].水科学进展,2017,28(4):534-542,9.基金项目
国家自然科学基金资助项目(41472220) （41472220）
中央高校基本科研业务费专项资金资助项目(310829162015)The study is financially supported by the National Natural Science Foundation of China(No.41472220) and the Fundamental Research Funds for the Central Universities (No.310829162015). （310829162015）
