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为了提供挪威南部泰勒马克县Storgama的11个小型源头集水区(30～268 m~2)气候操控实验的基线数据,我们对位点特征和径流质量的天然可变性进行了分析。各位点径流中的年平均浓度的变异系数为26%～61%,其中总有机碳(TOC)和碳氮比(C/N)最小而无机氮(N)值最大。这些集水区的无机氮、TOC和总磷浓度比附近更大的Storgama集水区(0.6 km~2)高2～5倍。径流中的TOC和TON浓度随着土壤碳和氮含量以及集水区土壤体积而增加。对于径流中的硝酸盐(NO_3)和铵来说则相反。在潮湿年份,裸岩的比例是径流中年平均NO_3浓度的主要指示指标。
To provide baseline data on climatic control experiments in 11 small source catchments (30-268 m 2) in Storgama, Telemark County, southern Norway, we analyzed the natural variability of site characteristics and runoff quality. The coefficient of variation (CV) of annual average concentration in runoff at each site ranged from 26% to 61%, with the smallest total organic carbon (TOC) and C / N ratio and the highest inorganic nitrogen (N) value. The concentrations of inorganic nitrogen, TOC and total phosphorus in these watersheds are 2 to 5 times higher than the nearby Storgama catchment (0.6 km 2). The concentrations of TOC and TON in runoff increased with soil carbon and nitrogen content and soil volume in the catchment. The opposite is true for nitrate (NO 3) and ammonium in runoff. In wet years, the proportion of bare rock is the major indicator of annual average NO 3 concentration in runoff.