Observations on the spatial and temporal variation in the phosphorus status of lakes in the British Isles
Observations on the spatial and temporal variation in the phosphorus status of lakes in the British Isles
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DOI：
10.1111/j.1475-2743.1998.tb00631.x
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发表时间：
1998-06
影响因子：
3.8
通讯作者：
R. Foy;A. Bailey‐Watts
中科院分区：
文献类型：
--
作者：
R. Foy;A. Bailey‐Watts
抽象的。对英格兰、苏格兰和北爱尔兰 (NI) 902 个湖泊的总磷 (TP) 浓度进行的检查表明，只有苏格兰湖泊具有较高比例 (73%) 的贫营养水域（TP 100 μg PI-1 和仅 29% 101 μg PI-1），这可能反映了污水处理厂 (STW) 的磷输入，尽管排水农业集水区的湖泊经常产生较高的 TP 浓度。 1985 年至 1995 年间，苏格兰利文湖的点源总磷年输入量减少了 8 吨磷，即 1985 年流入该湖的总磷量的 40%。由于点源输入的溶解钼酸盐活性磷 (MRP) 比例比扩散输入丰富，因此 MRP 负荷减少了 46%。从 1974 年到 1995 年，尽管 STW 的总磷输入减少，但内湖 (NI) 的总磷浓度却有所增加。对流入内湖的两条主要河流的年度总磷负荷进行划分，显示来自非点源的河流 MRP 负荷以年增长率 1.9 和 2.3 kg P km-2 增加。剩余的非 MRP 河流负荷并未受到 STW 较低的 TP 负荷的影响，并且没有显示出随时间增加的趋势。来自不列颠群岛其他湖泊系统的数据不足，无法判断内湖流域观察到的非点源 MRP 负荷的增加是否在其他地方重复出现。
Abstract. An examination of total phosphorus (TP) concentrations from 902 lakes in England, Scotland and Northern Ireland (NI), suggest that only Scottish lakes have a high percentage (73%) of oligotrophic waters (TP 100 μg PI‐1 and only 29% 101 μg PI‐1) which may reflect P inputs from sewage treatment works (STWs) although lakes draining agricultural catchments frequently produced high TP concentrations. Between 1985 and 1995, annual point source TP inputs to Loch Leven, Scotland, declined by 8 tonnes P or 40% of the 1985 TP loadings to the Loch. As point source inputs were proportionally richer in dissolved molybdate reactive phosphorus (MRP) than diffuse inputs, the MRP loading was reduced by 46%. From 1974 to 1995, TP concentrations in Lough Neagh (NI) increased despite reduced TP inputs from STWs. Partitioning of annual TP loadings from two major inflowing rivers to Lough Neagh, showed river MRP loadings from non‐point sources had been increasing at annual rates of 1.9 and 2.3 kg P km‐2. The remaining non‐MRP river loadings had not been influenced by lower TP loads from STWs and showed no tendency to increase with time. Insufficient data is available from other lake systems in the British Isles to judge whether the increase in non‐point source MRP loadings observed in the Lough Neagh catchment has been repeated elsewhere.