灌溉排水学报2017，Vol.36Issue(6)：1-7,7.DOI:10.13522/j.cnki.ggps.2017.06.001
基于BEPS模型的雨养冬小麦农田土壤水分动态模拟
Modelling Soil Moisture Dynamics in Rain-fed Winter Wheat Field Using the BEPS Model
摘要
Abstract
BEPS (Boreal Ecosystem Productivity Simulator) is a model for simulating water and carbon cycling in boreal ecosystem by couplingthe water and the carbon in the stomatal conductivity. This paper investigated the suitability of BEPS for simulating soil moisture dynamics in small-scale rain-fed winter wheat fields. The BEPS model was parametrized using rainfall interception by crop, radiative transport process in canopy, root distribu-tion and soil hydrological properties. Using the parameterized model, we simulated the dynamic of soil water in a rain-fed winter wheat field at Zhengzhou Agrometeorological Station from 2011 to 2015, and the simulated re-sults were compared with measured data. The results showed that the parameterized BEPS was able to simulate soil moisture dynamic in the wheat field, with a R-squared coefficient of 0.70 and average relative error less than 25.0%. However, the model was less accurate in simulating change of water in deep soil. Usinga time step of 10 days, the model worked better before the jointing stage than after it. Soil hydrological properties were found to be the main factors affecting the movement of soil water in vertical direction, and the model could be further im-proved to more accurately simulate soil moisture dynamics.关键词
BEPS模型/雨养/冬小麦/参数方案/土壤水分Key words
BEPS/rain-fed/winter wheat field/parameterization schemes/simulation of soil moisture分类
农业科技引用本文复制引用
郭其乐,李军玲..基于BEPS模型的雨养冬小麦农田土壤水分动态模拟[J].灌溉排水学报,2017,36(6):1-7,7.基金项目
中国气象局·河南省农业气象保障与应用技术重点开放实验室开放研究基金项目(AMF201404) （AMF201404）
