Recent advances in modelling nitrate transport in the Chalk unsaturated zone
Recent advances in modelling nitrate transport in the Chalk unsaturated zone
复制标题
白垩不饱和区硝酸盐输运模拟的最新进展
DOI：
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发表时间：
2007
影响因子：
1.4
通讯作者：
H. Wheater
中科院分区：
文献类型：
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作者：
S. Mathias;A. Butler;A. Ireson;B. Jackson;N. McIntyre;H. Wheater
白垩不饱和区是至关重要的控制硝酸盐的交付白垩流和地下水提取威尔斯。在本文中，从白垩非饱和带的双渗透率数值模型的结果被用来说明基质和裂缝流动的相对作用。一个主要的挑战出现在代表白垩不饱和带流域尺度模型养分管理。这些方法一般都是基于简单的概念性水库或隔室来代表土壤和地下水。一个更合适的概念化最近被开发和应用到兰伯恩流域内的一个流域尺度的营养模型（INCA粉笔）。这项工作的初步结果进行了讨论，这清楚地说明了十年的时间尺度，需要考虑的背景下，养分管理和水框架指令。
The Chalk unsaturated zone is crucial in controlling the delivery of nitrate to Chalk streams and groundwater abstraction wells. In this paper, results from a dual-permeability numerical model of the Chalk unsaturated zone are used to illustrate the relative roles of matrix and fracture flow. A major challenge arises in representing the Chalk unsaturated zone within catchment-scale models for nutrient management. These have generally been based on simple conceptual reservoirs or compartments to represent soils and groundwater. A more appropriate conceptualization has recently been developed and applied to the Lambourn catchment within a catchment-scale nutrient model (INCA-Chalk). Preliminary results from this work are discussed, which clearly illustrate the decadal time scales that need to be considered in the context of nutrient management and the Water Framework Directive.