Notice of RetractionStudy on Strategies for Nitrogen and Phosphorus Loss Controlling by SWAT Modelling: A Case Study at Miyun Reservoir

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Improper nitrogen and phosphorus application and land use strategies were the main causes for the nitrogen and phosphorus loss which contribute greatly to the agricultural non-point source pollution. In this study, a calibrated and validated SWAT model were applied to investigate the loss of nitrogen and phosphorus under 6 different fertilization scenarios with two different land use patterns at the lake shore areas in Miyun Reservoir. The results showed that the current total nitrogen loss reached about 1427 t per year in the research region. In contrast, the current total phosphorus loss was not so seriously in the region with about 0.7 t loss per year and little decreased under the improved scenarios. It was indicated controlling the nitrogen loss in the region was urgently needed in the lakeshore region of Miyun Reservoir; different land use scenarios and nutrient management strategies showed different impacts on nitrogen and phosphorus loss. The total nitrogen loss can be reduced by about 4.81% to 33.04% under the current land use pattern when optimized nitrogen, but the total phosphorus control effect is only 0.38% -0.84% By contrast, under the optimized land use scenario, the total nitrogen loss can be reduced more effectively with about 16% to 43% of decrease, and the total phosphorus pollution loss can be decreased 5% to 14%; the combination of optimized fertilizer management strategies and optimized land use strategy can control the nitrogen and phosphorus losses more effectively.