Changes in water colour between 1986 and 2006 in the headwaters of the River Nidd, Yorkshire, UK
Changes in water colour between 1986 and 2006 in the headwaters of the River Nidd, Yorkshire, UK
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DOI：
10.1007/s10533-010-9474-x
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发表时间：
2010-05
期刊：
影响因子：
4
通讯作者：
P. Chapman;A. McDonald;R. Tyson;S. Palmer;G. Mitchell;B. Irvine
中科院分区：
文献类型：
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作者：
P. Chapman;A. McDonald;R. Tyson;S. Palmer;G. Mitchell;B. Irvine
本研究比较了1986年和2006/2007年英格兰东北部Nidd河15个子流域的水色的时空变异性。1986年至2006/2007年期间，所有子集水区的年平均水色均有所增加。然而，增幅差异很大，从22%到155%不等。统计分析表明，子集水区可以分为两个“类型”的基础上的水化学，因此径流的主要来源;类型1的流量占主导地位的泥炭径流和类型2的流量更大的贡献似乎起源于矿物质土壤层，如所示的较高的硅，基阳离子浓度和pH值。最大的比例增加水色观察到的子流域，有较小的年平均水色值在1986年，在一般情况下，2型子流域。水的颜色增加率较高的2型集水区，在1型集水区相比，可能与吸附的溶解有机碳（DOC）的矿物层内的有机-矿物土壤在较低的集水斜坡可能是由于酸性硫沉积的变化的变化。
This study compares the spatial and temporal variability of water colour for fifteen sub-catchments of the River Nidd, northeast England, in 1986 and 2006/2007. Between 1986 and 2006/2007, mean annual water colour increased in all the sub-catchments. However, there was considerable variation in the increase, which ranged from 22 to 155%. Statistical analysis revealed that the sub-catchments could be split into two ‘types’ based on water chemistry and therefore dominant source of runoff; type 1 where flow was dominated by runoff from peat and type 2 where a greater contribution of flow appears to originate from mineral soil horizons, as indicated by the higher silicon, base cation concentrations and pH values. Largest proportional increases in water colour were observed in the sub-catchments that had the smaller mean annual water colour values in 1986 which were, in general, the type 2 sub-catchments. The higher rate of water colour increase in the type 2 catchments, in comparison to the type 1 catchments, may be related to changes in adsorption of dissolved organic carbon (DOC) within the mineral horizons of the organo-mineral soils on the lower catchment slopes possibly as a result of changes in acid sulphur deposition.