Nutrient discharges from a typical watershed in the hilly area of subtropical China
文献类型：期刊论文
| 作者 | Zhang, GL; Yang, JL; Zhao, YG |
| 刊名 | PEDOSPHERE
 |
| 出版日期 | 2003-02-01 |
| 卷号 | 13期号:1页码:23-30 |
| 关键词 | discharge nutrients runoff subtropical China watershed |
| ISSN号 | 1002-0160 |
| 通讯作者 | Zhang, GL() |
| 英文摘要 | Agriculture is still the biggest contributor of non-point source (NPS) pollution to water bodies and runoff discharges of nutrients and other chemicals are one of the most important pathways. This study was conducted during 1998similar to1999 in a typical watershed with complex agriculture and forestry systems as well as dotted farmer villages, in a transitional region between the mid- and northern subtropical zones of China. Continuous sampling of stream water was performed regularly at a weekly frequency, with additional sampling after all major rainfall events. The discharges of N and P nutrients and suspended materials were measured and the, total and area-averaged annual discharges of all components were calculated. The results showed an uneven seasonal distribution of nutrient discharges with summer storms contributing most to the total fluxes. This study demonstrated a high dependence of runoff volume on rainfall but the overall runoff coefficients were dependent on land use type and watershed size. The area-averaged annual discharges varied greatly among the sub-watersheds with different sizes and land use structures. This is the first study estimating the area-averaged annual discharges of N and P in the hilly areas of subtropical China, which were 1.5 g m(-2) a(-1) and 0.1 g m(-2) a(-1), respectively, providing important reference values for the assessment of regional agricultural non-point source pollution. |
| 收录类别 | SCI |
| WOS关键词 | NONPOINT-SOURCE POLLUTION ; PHOSPHORUS |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000186055800003 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559256 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhang, GL |
| 作者单位 | Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, GL,Yang, JL,Zhao, YG. Nutrient discharges from a typical watershed in the hilly area of subtropical China[J]. PEDOSPHERE,2003,13(1):23-30. |
| APA | Zhang, GL,Yang, JL,&Zhao, YG.(2003).Nutrient discharges from a typical watershed in the hilly area of subtropical China.PEDOSPHERE,13(1),23-30. |
| MLA | Zhang, GL,et al."Nutrient discharges from a typical watershed in the hilly area of subtropical China".PEDOSPHERE 13.1(2003):23-30. |
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来源：南京土壤研究所
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