| 罗毅,雷志栋,杨诗秀.一个预测作物根系层储水量动态变化的概念性随机模型[J].水利学报,2000,31(8):0080-0084 |
| 一个预测作物根系层储水量动态变化的概念性随机模型 |
| A conceptual-stochastic model for predicting the dynamic soil water storage in crop root zone |
| |
| DOI： |
| 中文关键词: 随机模型 土壤水 墒情 蒸散发 |
| 英文关键词: stochastic model soil water prediction evapotranspiration |
| 基金项目: |
|
| 摘要点击次数: 2405 |
| 全文下载次数: 139 |
| 中文摘要: |
| 本文在文献[1][2]的基础上，构造了色噪声驱动下的根系层储水量动态变化的概念性随机模型；利用数值方法对模型进行求解，得到了根系层储水量的概率密度函数，利用禹城站大型蒸渗仪1997年冬小麦返青期的观测资料对模拟结果进行了验证。验证结果表明，本文建立的概念性随机模型是有效的，可以用于田间墒情预报。 |
| 英文摘要: |
| In this paper, a conceptual-stochastic model for predicting the dynamic variation of soil water storage in crop root zone was established. In the model, the stochastic potential evapotranspiration process was incorporated into a soil water balance equation of the root zone, thus a time dependent, stochastic differential equation was derived. Furthermore, the Fokk-Planck equation corresponding to the differential equation was derived and solved numerically. The probability density distribution, mean and standard deviation of soil water storage in root zone were obtained. The comparison of predicted mean and confidence band at 95% with the measured soil water storage shows that the model is effective in soil watr storage prediction. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|