Controls on inorganic nitrogen leaching from Finnish catchments assessed using a sensitivity and uncertainty analysis of the INCA-N model
作者： Noora Veijalainen , Inese Huttunen , Lauri Arvola , Richard Skeffington , Martyn N. Futter
DOI:
关键词: Dissolved inorganic nitrogen 、 Hydrology (agriculture) 、 Hydrology 、 Sensitivity (control systems) 、 Current (stream) 、 Inorganic nitrogen 、 Uncertainty analysis 、 Drainage basin 、 Leaching (agriculture) 、 Geography
摘要: The semi-distributed, dynamic INCA-N model was used to simulate the behaviour of dissolved inorganic nitrogen (DIN) in two Finnish research catchments. Parameter sensitivity and structural uncertainty were analysed using generalized analysis. Mustajoki catchment is a forested upstream catchment, while Savijoki represents intensively cultivated lowlands. In general, there more influential parameters than Mustajoki. Model results sensitive N-transformation rates, vegetation dynamics, soil river hydrology. Values based on long-term measurements covering both warm cold years. highest measured DIN concentrations fell between minimum maximum values estimated during lowest outside these bounds, suggesting that some retention processes may be missing from current structure. occurred mainly low flow periods; so effects total loads small.
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