摘要
本文把随机模拟方法应用于土壤水分的定量研究之中,并假定土壤水分的变化序列满足时间序列的通用加法模型。经检验证明:土壤水分变化序列由一确定的周期分量与一非确定的随机分量迭加而成。周期分量反映了气候的周期性波动和作物需水对土壤水分变化的影响,随机分量则反映了随机性的气候波动对土壤水分的影响,经对陕西武功、山西永济和陕西扶风三站土壤水分变化过程的模拟,其结果表明,该方法能以较高精度预测或模拟土壤水分在长时期內的动态变化过程,为采取灌溉排水和蓄水保墒等调节农田土壤水分的技术措施提供科学依据。
In this paper, stochastic approach is applied to research soil moisture quantitatively, and it is supposed that the soil water series can be represented by a general additive model and it is proved that soil moisture series is supper posed by a periodic-deterministic process and a stochastic component. The periodic component is the effect of climates periodic fluctuation and crop evapot■anspiration, and the stochastic component is the effect of stochastic fluctuction of climate on soil moisture. Results of modeling the soil water process at Wugong. Shanxi, Yongji Shanxi, Fufeng. Shanxi has demonstrated that this method for modeling soil water content series ■is of higher precision.
出处
《土壤学报》
CAS
CSCD
北大核心
1990年第1期17-24,共8页
Acta Pedologica Sinica
