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首页> 外文期刊>Hydrology Research >Simulated nitrogen leaching patterns and adaptation to climate change in two Finnish river basins with contrasting land use and climatic conditions
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Simulated nitrogen leaching patterns and adaptation to climate change in two Finnish river basins with contrasting land use and climatic conditions

机译：在土地利用和气候条件不同的情况下，模拟了两个芬兰河流域的氮淋失模式及其对气候变化的适应

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摘要

Inorganic nitrogen (N) loading was simulated by the catchment scale INCA-N model from twonlarge river basins with contrasting land use. The main aim was to analyze the timing and originnof inorganic N loading and the effectiveness of different water protection methods. Predictednchanges in precipitation and temperature increases the nutrient load from catchments to waternbodies in future climate. The total inorganic N load from the forested Simojoki river basin locatednin northern Finland was about 5% of that from the Loimijoki river basin in south western Finland.nIn the Loimijoki river basin agriculture dominated inorganic N loading. When applying realisticnwater protection methods (limits on manure spreading) the simulated inorganic N load from thenriver basin decreased by 11%. With more drastic methods (no manure spreading + catch crop) andecrease up to 34% was achieved. In the Simojoki river basin there were several equallynsignificant sources, so suitable combinations of different water protection measures would be thenmost efficient way to decrease the inorganic N load. As the inorganic N load may be composednof very different sources, depending on land use in the river basin, efficient allocation of waternprotection measures requires detailed analysis of different sources of loading.
机译：利用流域尺度INCA-N模型模拟了两个大型流域的无机氮（N）负荷，并对比了土地利用。主要目的是分析无机氮负荷的时机，来源以及不同节水方法的有效性。未来气候中降水和温度的预测变化会增加从流域到水体的养分负荷。芬兰北部森林茂密的Simojoki流域的无机氮总负荷约为芬兰西南部Loimijoki流域的5％。n在Loimijoki流域，农业以无机氮负荷为主。当采用现实的水保护方法（限制肥料撒播）时，来自河流盆地的模拟无机氮负荷降低了11％。使用更严格的方法（不撒肥+收割农作物），最多可增加34％。在Simojoki流域，有几个同等重要的水源，因此，不同水保护措施的适当组合将是降低无机氮负荷的最有效方法。由于无机氮负荷可能由非常不同的来源组成，这取决于流域内的土地用途，因此有效配置水保护措施需要对不同负荷来源进行详细分析。

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