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一个考虑土壤水侧向运动的分布式墒情模型

发表时间:2008-07-15  浏览量:1412  下载量:506
全部作者: 王加虎,李丽,郝振纯
作者单位: 河海大学水文水资源与水利工程科学国家重点实验室
摘 要: 墒情预报在现代农业中十分重要,针对现有墒情模型在空间描述尤其是土壤水侧向运动描述方面的不足,本文尝试建立了一个分布式墒情模型。模型利用小单元分布式组合的方法描述下垫面的空间差异,单元内采用水量平衡模型,单元之间采用概念性方法简单考虑土壤水的侧向运动。模型利用现有的蟠庄灌区的实测资料进行检验,采用当地实测资料回归分析的参数,进行作物蒸发蒸腾量的短期预测,效果良好。研究表明,考虑土壤水侧向运动的墒情模型更适用于地形起伏的地区,但还需要更完备的实测资料和更深入的研究。
关 键 词: 水文学;分布式;墒情模型;蒸散发预测;土壤水侧向运动
Title: A distributed model having lateral flow calculation for soil moisture forecast
Author: WANG Jiahu, LI Li, HAO Zhenchun
Organization: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering
Abstract: Soil moisture forecast models are very useful in modern agriculture and a distributed one is designed aimed at three shortcomings of traditional ones. Firstly, region is partitioned into groups of cells, which can give a better reflection of spatial difference of surface. Secondly, the lateral flow of soil water is introduced into water balance model of each cell, which leads to better effect in uneven region. Thirdly, equation and parameters of transpiration prediction are studied with local fact data. The model based on the theory above has been validated by observed data of Panzhuang Irrigation Area and a well score has been got. Study shows that in uneven region, a better soil water simalation can be got when lateral flow calculation is added, but further research is recommended before application.
Key words: hydrology; distributed model; soil moisture forecast; transpiration prediction; lateral flow calculation
发表期数: 2008年11月第13期
引用格式: 王加虎,李丽,郝振纯. 一个考虑土壤水侧向运动的分布式墒情模型[J]. 中国科技论文在线精品论文,2008,1(13):1449-1454.
 
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