Study of Nitrogen and Phosphorus Inflow Fluxes into Qingliangshan Reservoir Base on SWAT Model
Taking the Qingliangshan Reservoir Watershed as the research object,this study builds a soil and water assessment tool (SWAT) model to calculate reservoir inflow and nitrogen and phosphorus fluxes by simulation and thereby explore the spatio-temporal distribution characteristics and potential spatia...
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2022-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2022.09.006 |
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| Summary: | Taking the Qingliangshan Reservoir Watershed as the research object,this study builds a soil and water assessment tool (SWAT) model to calculate reservoir inflow and nitrogen and phosphorus fluxes by simulation and thereby explore the spatio-temporal distribution characteristics and potential spatial sources of nitrogen and phosphorus.The following observations can be made from the results.The multi-year average inflow into the Qingliangshan Reservoir is 2.77 m<sup>3</sup>/s, and the total nitrogen (TN) and total phosphorus (TP) inflow fluxes into the reservoir are 33 030.3 kg/a and 2 282.0 kg/a, respectively.The TN and TP inflow fluxes of the Xintian tributary (TN:19 882.7 kg/a;TP:1 275.4 kg/a) into the reservoir are higher than those of the Xitian tributary (TN:12 977.5 kg/a,TP:956.9 kg/a).The nitrogen and phosphorus inflow fluxes in the flood season are also higher than those in the non-flood season,with peak concentrations of TN and TP in the water both observed before the flood season.Large TN and TP loads are mainly distributed in the central area of the watershed. Specifically,the TN load is concentrated in areas with a high proportion of agricultural land,while the TP load is concentrated in areas with a high proportion of Ferric Acrisols (ACf).The nitrogen in the watershed primarily comes from agricultural fertilization,whereas the phosphorus possibly comes from natural sources.The results provide a scientific basis for the management of the water environment in the watershed. |
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| ISSN: | 1001-9235 |