A novel explicit approach to model bromide and pesticide transport in connected soil structures
A novel explicit approach to model bromide and pesticide transport in connected soil structures
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一种新颖的显式方法来模拟相连土壤结构中溴化物和农药的传输
DOI：
10.5194/hess-15-2127-2011
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发表时间：
2011
影响因子：
6.3
通讯作者：
E. Zehe
中科院分区：
文献类型：
--
作者：
J. Klaus;E. Zehe
抽象的。本研究测试了将虫洞和瓦片排水沟作为连通结构来模拟结构性非均质土壤在坡面尺度上的水流、溴和农药运移是否可行。其实质是将蠕虫洞穴表示为山坡模型中低流动阻力的形态连通的路径。最近的一项蒙特卡洛研究(Klaus和Zehe，2010，水文过程，24，第1595-1609页)表明，这种方法可以成功地再现瓷砖排水田间灌溉试验期间记录的瓷砖排水事件流量。然而，几个与现有的大量数据库一致的“山坡建筑”允许很好地再现瓦片排水沟的水流响应。因此，我们的第二个目标是，当将溴化物示踪剂数据纳入模型证伪过程时，是否可以减少空间模型设置中的这种“等效性”。因此，我们模拟了13个空间模型的溴的传输，这些空间模型在重现瓷砖排水事件放电方面表现最好，而不需要任何进一步的校准。所有模型都能很好地预测累积溴淋失到瓷砖排水沟的时间动态，但只有四个模型与累积水平衡和累积溴流失到瓷砖排水沟中匹配。因此，行为模型体系结构的数量可以减少到四个。其中一个装置被用来模拟异丙隆的传输，根据足迹数据库使用不同的参数组合来表征吸附。然而，当我们考虑到非常接近于1的延迟系数时，模拟只能重现观察到的淋滤行为。
Abstract. The present study tests whether an explicit treatment of worm burrows and tile drains as connected structures is feasible for simulating water flow, bromide and pesticide transport in structured heterogeneous soils at hillslope scale. The essence is to represent worm burrows as morphologically connected paths of low flow resistance in a hillslope model. A recent Monte Carlo study (Klaus and Zehe, 2010, Hydrological Processes, 24, p. 1595–1609) revealed that this approach allowed successful reproduction of tile drain event discharge recorded during an irrigation experiment at a tile drained field site. However, several "hillslope architectures" that were all consistent with the available extensive data base allowed a good reproduction of tile drain flow response. Our second objective was thus to find out whether this "equifinality" in spatial model setups may be reduced when including bromide tracer data in the model falsification process. We thus simulated transport of bromide for the 13 spatial model setups that performed best with respect to reproduce tile drain event discharge, without any further calibration. All model setups allowed a very good prediction of the temporal dynamics of cumulated bromide leaching into the tile drain, while only four of them matched the accumulated water balance and accumulated bromide loss into the tile drain. The number of behavioural model architectures could thus be reduced to four. One of those setups was used for simulating transport of Isoproturon, using different parameter combinations to characterise adsorption according to the Footprint data base. Simulations could, however, only reproduce the observed leaching behaviour, when we allowed for retardation coefficients that were very close to one.
影响因子：
3.2
作者：
K. Beven
通讯作者：
K. Beven