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Shallow groundwater nitrogen responses to different land use managements in the riparian zone of Yuqiao Reservoir in North China
Lu Haiming; Yin Chengqing
2008
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
Volume20Issue:6Pages:652-657
AbstractThis field study investigated the nitrogen concentrations in the shallow groundwater from an ephemeral stream and four land uses: cropland, two-year restored (2yr) and five-years restored (5yr) woodlands, fishponds, and the nitrogen flux in the riparian zone of Yuqiao Reservoir. The groundwater nitrate-N concentrations in cropland were the highest among the four land uses. Total dissolved nitrogen (TDN) and nitrate-N concentrations in the 2yr woodland were significantly (p < 0.05) higher than in 5yr woodland. The lowest nitrogen concentrations were detected in fishponds. Nitrate-N was the main form in cropland and 2yr woodland, whereas both nitrate-N and dissolved organic nitrogen (DON) were the main species in 5yr woodland and fishponds. But, ammonium-N was the main form in the ephemeral stream. During the rainy season, the groundwater flow with dissolved nitrogen drains from upland into the reservoir along the hydraulic gradient. The woodland between the cropland and reservoir could act as a buffer to retain shallow groundwater nitrogen. The dominant form of ammonium-N in the groundwater TDN pool in ephemeral stream indicated that nitrogen from the village and orchard in upland flowed into the reservoir via subsurface flow. The fishpond was not an important pollution source for nitrogen transfer via shallow groundwater.
Department环境水质学国家重点实验室
KeywordNitrogen Groundwater Reservoir Fishpond Cropland Woodland Riparian Zone
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Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/22284
Collection环境水质学国家重点实验室
Recommended Citation
GB/T 7714
Lu Haiming,Yin Chengqing. Shallow groundwater nitrogen responses to different land use managements in the riparian zone of Yuqiao Reservoir in North China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2008,20(6):652-657.
APA Lu Haiming,&Yin Chengqing.(2008).Shallow groundwater nitrogen responses to different land use managements in the riparian zone of Yuqiao Reservoir in North China.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,20(6),652-657.
MLA Lu Haiming,et al."Shallow groundwater nitrogen responses to different land use managements in the riparian zone of Yuqiao Reservoir in North China".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 20.6(2008):652-657.
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