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Using HYDRUS to simulate the dynamic changes of Ca2+ and Na+ in sodic soils reclaimed by gypsum
cation exchange ion transport leaching
2016/2/22
Sodic soils are characterized by the occurrence of excess sodium to levels that can adversely affect soil structure. In recent years, with the advent of alternatives for reclaiming sodic soils, such a...
Simulating nonequilibrium movement of water, solutes and particles using hydrus – a review of recent applications
nonequilibrium flow and transport physical nonequilibrium chemical nonequilibrium numerical models preferential flow reactive transport HYDRUS review of recent applications
2015/2/3
Water and contaminants moving through the vadose zone are often subject to a large number of simultaneous physical and chemical nonequilibrium processes. Traditional modeling tools for describing flow...
Comparison of CGMS-WOFOST and HYDRUS-1D Simulation Results for One Cell of CGMS-GRID50
GRID50 capacity based model WOFOST Richards’ equation based model HYDRUS-1D Crop Growth Monitoring System (CGMS) soil profile water balance relative soil moisture
2015/1/28
CGMS (Crop Growth Monitoring System) developed by JRC is an integrated system to monitor crop behaviour and quantitative crop yield forecast that operates on a European scale. To simulate water balanc...
HYDRUS-1D在基于过程的地下水污染评价中的应用
HYDRUS-1D 地下水污染 包气带 数值模拟
2014/3/20
包气带是污染质进入地下水必须经过的介质,对地下水的污染源强起到至关重要的作用。本文应用HYDRUS-1D模型模拟了污染物进入地下水前在包气带中的迁移转化过程,构建了基于过程的地下水污染评价方法。并以某尾矿库为例,进行了污染质在土壤-地下水系统运移模拟与污染评价的耦合研究。结果表明,使用基于过程的地下水污染评价方法与传统单一对地下水进行模拟预测评价的方法相比,能够较准确地反映地下水污染源强的时空变化...
本文建立了一个基于集合卡尔曼滤波（EnKF）方法和HYDRUS-1D 模型相结合的单点土壤水分同化方案，以期通过同化表层土壤含水量的实测值来改进土壤剖面含水量预测精度。结果表明，该同化方案能有效改进表层（4~10cm）及浅层（50cm）的土壤含水量预测精度，对下层（100~150cm）的土壤含水量预测精度仍有影响，但其影响有好有坏，而对于深层（≥200cm）的土壤含水量预测精度几乎没有任何影响；对...
本文建立了一个基于集合卡尔曼滤波（EnKF）方法和HYDRUS-1D 模型相结合的单点土壤水分同化方案，以期通过同化表层土壤含水量的实测值来改进土壤剖面含水量预测精度。结果表明，该同化方案能有效改进表层（4~10cm）及浅层（50cm）的土壤含水量预测精度，对下层（100~150cm）的土壤含水量预测精度仍有影响，但其影响有好有坏，而对于深层（≥200cm）的土壤含水量预测精度几乎没有任何影响；对...
本文建立了一个基于集合卡尔曼滤波（EnKF）方法和HYDRUS-1D 模型相结合的单点土壤水分同化方案，以期通过同化表层土壤含水量的实测值来改进土壤剖面含水量预测精度。结果表明，该同化方案能有效改进表层（4~10cm）及浅层（50cm）的土壤含水量预测精度，对下层（100~150cm）的土壤含水量预测精度仍有影响，但其影响有好有坏，而对于深层（≥200cm）的土壤含水量预测精度几乎没有任何影响；对...
Hydrus-1D模型在田间水循环规律分析中的应用及改进
Hydrus-1D模型 位山灌区 水量平衡
2011/6/17
为分析农田水分运移规律，以华北平原位山引黄灌区典型田间为研究对象，应用Hydrus-1D模型连续模拟了 2006－2009年的田间水分运移过程。对模型中表面阻抗的计算方法进行了改进，从而改善了蒸散发的模拟结果，与涡度相关系统的实测蒸散发数据对比表明了改进的合理性。对蒸散发的分析表明，对于种植季节性作物的农田，叶面积指数（leaf area index，LAI）是影响蒸散发季节变化过程的重要因素，而...
Numerical Modeling of Wheat Irrigation using Coupled HYDRUS and WOFOST Models
LAI, leaf area index NSE, Nash–Sutcliffe coefficient SCE, shuffled complex evolution WOFOST, World Food Studies
2013/9/2
To efficiently manage water resources in agriculture, the hydrologic model HYDRUS-1D and the crop growth model WOFOST were coupled to improve crop production prediction through accurate simulations of...