地理学报 ›› 1992, Vol. 47 ›› Issue (2): 181-187.doi: 10.11821/xb199202010

• 论文 • 上一篇    

不同覆盖条件对土壤水热分布影响的计算机模拟Ⅱ——有限元分析及应用

隋红建1, 曾德超1, 陈发祖 2   

  1. 1. 北京农业工程大学;
    2. 中国科学院、国家计委地理研究所,北京
  • 出版日期:1992-03-15 发布日期:1992-03-15
  • 基金资助:

SIMULATION OF MULCH EFFECTS ON SOIL TEMPERATURE AND MOISTURE REGIMES PART II: FINITE ELEMENT ANALYSIS AND APPLICATION

Sui Hongjian1, Zeng Dechao1, Chen Fazu2   

  1. 1. Beijing Agricultural Engineering University;
    2. Institute of Geography, Chinese Academy of Sciences, Beijing
  • Online:1992-03-15 Published:1992-03-15

摘要: 在本研究的第一部分已建立了数学模型的基础上,本文进行了有限元分析。应用Galerkin法进行了空间域的离散,应用差分法及Douglas-Dapont预报校正法完成了时间域的离散及非线性处理。然后用Fortran-77编写了计算机程序,实现了不同覆盖层下非匀质土壤水热分布的定量分析,并进行了田间实验验证。计算与验证结果表明:塑膜膜侧种植校膜中心种植在地温稍高含水量稍低的情况下,可节约用膜7%;透水率很低的纸张在改进耐久性的基础上可能在一定条件下作为塑膜的代用品。

关键词: 覆盖, 土壤水热, 计算机模拟

Abstract: On the basis of the mathematical model was developed in part I, the governing equations were solved by the Galerkin-type finite element approach, together with the Douglas-Dapout Prediction-Correction method which have the advantage of less computer time than the itera-tive procedure for nonlinear problems.

Key words: Mulch, Soil moisture and temperature, Simulation