Nitrogen sources, processes, and associated impacts of climate and land-use changes in a coastal China watershed: Insights from the INCA-N model
| Autor: | Ayu Ervinia, Zhenyu Zhang, Jinliang Huang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Hydrology China Watershed Denitrification Nitrogen 010604 marine biology & hydrobiology Climate change 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Pollution Deposition (geology) Rivers Streamflow Environmental science Land use land-use change and forestry Nitrification Leaching (agriculture) Water Pollutants Chemical 0105 earth and related environmental sciences Environmental Monitoring |
| Zdroj: | Marine pollution bulletin. 159 |
| ISSN: | 1879-3363 |
| Popis: | The Integrated Nitrogen CAtchments (INCA-N) model was applied to identify the sources and processes controlling riverine nitrogen (N) export in the Jiulong River watershed, coastal China. Future riverine N exports were simulated under various scenarios of climate and land-use changes. The modeling results showed good agreement between the observed and simulated values of streamflow, N concentrations, and loads. It was revealed that fertilizer application, atmospheric N deposition, and sewage discharges were the main N sources, while the primary N cycling processes included soil nitrification, soil denitrification, and N leaching. Nitrate-N exports were predominantly impacted by climate change, whereas ammonium-N exports were more affected by land-use change. The coupled effects of climate and land-use changes were projected to amplify nitrogen export by 30%, 36%, and 36% for nitrate-N and 32%, 48%, and 71% for ammonium-N during the years for 2030s, 2050s, and 2080s, respectively. |
| Databáze: | OpenAIRE |
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