摘要
根据果树生理特性与土壤水动力学理论,建立了非恒定水位复杂边界条件下的蓄水单坑均质土入渗运动的数学模型,并采用交替方向隐式差分法进行求解。经试验验证,模拟结果与实测结果吻合较好,表明利用该方法模拟蓄水单坑的水分入渗问题是可行的。用本模型模拟了不同条件下的单坑入渗过程,根据模拟结果分析了不同因素对入渗规律的影响,为蓄水坑灌理论与灌水技术要素的深入研究奠定了基础。
Based on the physiological characteristics of fruit trees and the theory of moisture transfer in unsaturated soil, a numerical model with nonconstant water level and complex boundary condition is established. Alternating Direction Implicit Iteraction method is developed for simulation. The results of the numerical simulation and experiment are well coincident each other, showing that the model can be applied to simulate the infiltration movement of water storage pit. The numerical simulations of different conditions are performed to analyze the influence factors in infiltration law. The results would greatly benefit the study on the water storage irrigation theory and irrigation technology.
出处
《干旱地区农业研究》
CSCD
北大核心
2003年第3期86-90,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金重点项目(50239090)
关键词
蓄水坑灌法
单坑
数学模型
入渗规律
节水灌溉
果园
method of water storage pit irrigation
water storage pit
numerical model
infiltration law
