土壤-植物-大气连续体水分传输的计算机模拟  

Computer simulation of water transport in soil-plant-atmosphere continuum

作　　者：康绍忠[1] 刘晓明[1] 高新科[1] 熊运章[1] 

机构地区：[1]西北农业大学

出　　处：《水利学报》1992年第3期1-12,共12页Journal of Hydraulic Engineering

基　　金：国家自然科学基金

摘　　要：本文在土壤-植物-大气连续体(SPAC)水分传输机理研究的基础上,提出了包括根区土壤水分动态模拟、作物根系吸水模拟和蒸发蒸腾模拟三个子系统的SPAC水分传输动态模拟模型,设计了SPAC水分传输模拟的计算机软件,经冬小麦生育期模拟值和实测值的比较分析表明,该模型模拟田间土壤水分动态和作物蒸发蒸腾具有较高的精度。最后,分析了SPAC水分传输动态对土壤水分运动参数、气象因素的敏感性,并进行了SPAC水分传输动态的计算机仿真试验。Based on the research of water transportation mechanism in soil-plant-atmosphere continuum (SPAC),a computer simulation model of water transportation in SPAC is presented.This model has three branch systems to simulate,i) soil water dynamics in crop root zone,ii) crop roots water uptake and iii) evapotranspiration.The computer programs of water transportation in SPAC is designed by simulation language of continuous system (SLCS IV).The results of comparision of simulated value and measured value in winter wheat field show that the model has high precision.At last,the sensitivities of water transportation dynamics in SPAC for the soil water conductivity K(θ) and diffusitivity D(θ) as well as meteorology factors,have been analysed.

关 键 词：土壤 植物 水分 计算机 动态模型 

分 类 号：S152.75[农业科学—土壤学]