Modelling the chloride signal at Plynlimon, Wales, using a modified dynamic TOPMODEL incorporating conservative chemical mixing (with uncertainty)
Modelling the chloride signal at Plynlimon, Wales, using a modified dynamic TOPMODEL incorporating conservative chemical mixing (with uncertainty)
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DOI：
10.1002/hyp.6186
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发表时间：
2007-01
影响因子：
3.2
通讯作者：
T. Page;K. Beven;J. Freer;C. Neal
中科院分区：
文献类型：
--
作者：
T. Page;K. Beven;J. Freer;C. Neal
本文描述了动态TOPMODEL改进版本在威尔士Plynlimon的两个子集水区的应用。在水文模型中加入了可移动和不可移动储存库中的保守化学混合，试图模拟观测到的溪流氯化物浓度。该模型不能完全模拟观测到的行为，特别是短期到中期的动态。该研究强调的主要问题之一是干沉积和云滴沉积氯化物的表现，它们构成了长期氯化物质量收支的重要组成部分。参数集的均衡性抑制了确定有效集水区混合体积和系数的能力，也抑制了由集水区固定-储存先决条件决定的潜在质量输入和氯化物质量输入之间最可能的划分。尽管频谱分析表明，该模型不能完全再现观测到的河流氯化物浓度的1/f功率谱，这意味着水在集水区停留时间分布广泛，但在信号动态行为的某些方面得到了令人满意的模拟，因此取得了一些成功。版权所有©2006约翰威利父子有限公司
The application of a modified version of dynamic TOPMODEL for two subcatchments at Plynlimon, Wales is described. Conservative chemical mixing within mobile and immobile stores has been added to the hydrological model in an attempt to simulate observed stream chloride concentrations. The model was not fully able to simulate the observed behaviour, in particular the short‐ to medium‐term dynamics. One of the primary problems highlighted by the study was the representation of dry deposition and cloud‐droplet‐deposited chloride, which formed a significant part of the long‐term chloride mass budget. Equifinality of parameter sets inhibited the ability to determine the effective catchment mixing volumes and coefficients or the most likely partition between occult mass inputs and chloride mass inputs determined by catchment immobile‐store antecedent conditions. Some success was achieved, in as much as some aspects of the dynamic behaviour of the signal were satisfactorily simulated, although spectral analysis showed that the model could not fully reproduce the 1/f power spectra of observed stream chloride concentrations with its implications of a wide distribution of residence times for water in the catchment. Copyright © 2006 John Wiley & Sons, Ltd.