Finnish Lake Survey: The Role of Catchment Attributes in Determining Nitrogen, Phosphorus, and Organic Carbon Concentrations
Finnish Lake Survey: The Role of Catchment Attributes in Determining Nitrogen, Phosphorus, and Organic Carbon Concentrations
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芬兰湖泊调查：流域属性在确定氮、磷和有机碳浓度中的作用
DOI：
10.1007/978-94-007-0952-2_47
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
M. Forsius
中科院分区：
文献类型：
--
作者：
M. Rantakari;P. Kortelainen;J. Vuorenmaa;J. Mannio;M. Forsius
这项研究是基于1995年进行的芬兰湖泊调查，这是一个从国家湖泊登记册中统计选择的874个湖泊的数据集。该数据集被划分为亚组，以评估不同地理区域和不同规模湖泊的湖泊集水区关系。在最南端3个地区，全氮（TN）和全磷（TP）的多元回归方程的决定系数分别在0.40 ~ 0.53和0.37 ~ 0.53之间；最好的解释是农业用地和流域水域。在最北端的两个地区，泥炭地在集水区的比例、集水区坡度和TP浓度随湖泊高程和纬度的变化最能预测湖泊水体中TN浓度。北方地区全氮和总磷的多元回归方程决定系数分别为0.39 ~ 0.67和0.41 ~ 0.52。在形成的所有子集中，对总氮、总磷和总有机碳（TOC）的解释系数最好的是大型湖泊子集（bbb10 km2），该子集对总有机碳（TN）、总有机碳（TP）和总有机碳（TOC）的解释率为72 ~ 83%。这可能是由于这些湖泊的集水区分布不均。
This study is based on a Finnish lake survey conducted in 1995, a dataset of 874 statistically selected lakes from the national lake register. The dataset was divided into subgroups to evaluate lake water-catchment relationships in different geographical regions and in lakes of different size. In the three southernmost regions, the coefficients of determination in multiple regression equations varied between 0.40 and 0.53 for total nitrogen (TN) and between 0.37 and 0.53 for total phosphorus (TP); the best interpreters were agricultural land and water area in the catchment. In the two northernmost regions, TN concentrations in lake water were best predicted by the proportion of peatlands in the catchment, the catchment slope, and TP concentrations by lake elevation and latitude. Coefficients of determination in multiple regression equations in these northern regions varied between 0.39 and 0.67 for TN and between 0.41 and 0.52 for TP. For all the subsets formed, the best coefficients of determination explaining TN, TP, and total organic carbon (TOC) were obtained for a subset of large lakes (>10 km2), in which 72–83% of the variation was explained. This was probably due to large heterogeneous catchments of these lakes.