Revisiting water retention curves for simple hydrological modelling of peat
Revisiting water retention curves for simple hydrological modelling of peat
复制标题
重新审视保水曲线以进行泥炭的简单水文建模
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
P. Lafleur
中科院分区：
文献类型：
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作者：
Dimitre D. Dimitrov;P. Lafleur
泥炭水含量（θ）的精确建模对湿地研究至关重要。本文对Campbell和Van Genuchten土壤保水曲线（SWRCs）进行了修正，将其经验参数替换为可测量的特性。将地下水位深度（d WT）结合到swrc中，我们从d WT推导出计算体积θ的公式，并在一个简单的模型中进行编码，以验证我们的假设，即d WT是近饱和状态下低和高持水能力泥炭的可靠预测因子。我们将模拟结果与Mer blue沼泽（加拿大安大略省）和西部泥炭地沼泽（加拿大阿尔伯塔省）的时域反射θ测量结果进行了比较。在极端干燥和涝渍条件下限制Campbell SWRC，而不是在萎蔫点和现场容量条件下进行限制，效果更好。Van Genuchten SWRC分别用双曲段和逆双曲段逼近。简化后，其性能与改进后的Campbell SWRC基本一致。总的来说，我们的公式在广义泥炭参数下表现良好。
ABSTRACT Accurate modelling of peat water contents (θ) is critical for wetland studies. We modified the Campbell and Van Genuchten soil water retention curves (SWRCs) by replacing their empirical parameters with measurable properties. Combining the water table depth (d WT) into SWRCs, we derived formulae for calculating volumetric θ from d WT, coded in a simple model to test our hypotheses that d WT is a reliable predictor of θ for peat of low and high water holding capacity at near-saturation. We compared our simulations with time-domain reflectometry θ measurements at Mer Bleue bog (Ontario, Canada) and the Western Peatland fen (Alberta, Canada). Constraining Campbell SWRC at extreme drying and waterlogging rather than wilting point and field capacity produced superior results. The Van Genuchten SWRC was approximated by hyperbolic and inverse hyperbolic segments. When simplified, its performance reconciles with that of the modified Campbell SWRC. Overall, our formulae performed well with generalized peat parameters.
影响因子：
2.4
作者：
Loisel, Julie;Yu, Zicheng;Zhou, Weijian
通讯作者：
Zhou, Weijian