Table 1 Parameters Used in the Global NEWS-DIN Model
From: Impacts of human activities and climate change on the water environment of Lake Poyang Basin, China
Model Parts | Parameters | Units | Parameters Explanation |
|---|---|---|---|
Hydrology coefficients | Runoff | m yr-1 | Water runoff |
| Â | Qrem | 0-1 | Fraction of consumptively use water removed from the river |
| Â | Ddin | 0-1 | Fraction of N retained by reservoirs |
Point sources | GDP | U.S.$ indiv.−1 | Gross domestic product as purchasing-power parity |
|  | PopDens | indiv. km−2 | Population density |
| Â | R | 0-1 | Fraction of N removed by sewage treatment |
| Â | I | % | % of population connected to sewage system |
Diffuse sources | TNfe | kg N km−2 yr−1 | TN applied as fertilizer |
|  | TNma | kg N km−2 yr−1 | TN applied as animal manure |
|  | TNfix | kg N km−2 yr−1 | TN fixed by natural and agricultural fixation |
|  | TNdep | kg N km−2 yr−1 | TN deposited via atmospheric deposition for Waizhou Station drainage area |
|  | TNexp | kg N km−2 yr−1 | TN exported from the basin as crop harvest |
| Â | FEws | 0-1 | Fraction of N exported from landscape to the rivers as DIN |
| Â | RSD | 0-1 | The ratio of watershed N surplus against N input |