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Journal of Environmental Accounting and Management 2(2) (2014) 181--187 | DOI:10.5890/JEAM.2014.06.008

Fei Xu$^{1}$,$^{2}$, Yanwei Zhao$^{2}$

$^{1}$ Beijing Municipal Research Academy of Environmental Protection; National Engineering Research Center for Urban Environmental Pollution Control: Beijing 100037, China

$^{2}$ State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China

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Abstract

The decline of water quality of the inflow river has direct negative impact on the ecological conditions of lake ecosystem. The design of subsurface wetlands was considered to be an effective method for improving the water quality of inflow rivers, especially reducing the excessive nutrients to alleviate eutrophication. A subsurface wetland was designed by applying the wetland model Subwet 2.0 for treating the polluted inflow river— Fu River of Baiyangdian Lake. The simulation scenarios concerning the changes of wetland area were designed to find out the treatment effect of the subsurface wetland. The variation trends of the effluent concentrations of BOD5, ammonium, total nitrogen and total phosphorus for the scenarios had been obtained. The area and volume of the wetland which are the core design parameters have been determined through comparing the reduction percentages of the main pollutants under different design scenarios. The results showed that the simulation results in scenario 2 can simultaneously satisfy the conditions that the efficiencies of removal of total nitrogen and total phosphorus should reach to 90% in the Fu River and meanwhile less time, which is considered as the optimal design scheme. The area and volume should be set as 875m2and 525m3 to make the water quality standard of Fu River change from class V to class III, which could greatly control the eutrophication of Baiyangdian Lake. The method of wetland design based on model could reduce the uncertainties of traditional wetland design method and facilitate the water quality improvement of aquatic ecosystems.

Acknowledgments

The special thanks are to the project supported by the Fund for Innovative Research Group of the National Natural Science Foundation of China (Grant No. 51121003), the Key Research Program on Water Pollution Control and Remediation, P.R. China (Grant No. 2008ZX07209-009) and the National Natural Science Foundation of China (Grant No. 51279009).

References

1. [1]	Carleton J.N., Grizzard T.J., Godrej A.N., Post H.E., Lampe L. and Kenel P.P. (2000), Performance of a constructed wetlands in treating urban stormwater runoff, Water Environment Research, 72, 295-304.

2. [2]	Crites R.W. (1994), Design criteria and practice for constructed wetlands, Water Science and Technology, 29, 1-6.

3. [3]	Fetter C.W. (1994), Applied hydrogeology, Englewood Cliffs: Prentice Hall.

4. [4]	Jin X.C. (2008), The key scientific problems in lake eutrophication studies, Acta Scientiae Circumstantiae, 28, 21-23.

5. [5]	Jing S.R. and Lin Y.F. (2004), Seasonal effect on ammonia nitrogen removal by constructed wetlands treating polluted river water in southern Taiwan, Environmental Pollution, 127, 291-301.

6. [6]	Jing S.R., Lin Y.F., Lee D.Y. and Wang T.W. (2001), Nutrient removal from polluted riverwater by using constructed wetlands, Bioresource Technology, 76, 131-135.

7. [7]	Jørgensen S.E. and Fath B. (2011), Fundamentals of ecological modelling. 4th edition. Application in environmental management and research. Amsterdam: Elsevier.

8. [8]	Kadlec R.H. (2000), The inadequacy of first-order treatment wetland models, Ecological Engineering, 15, 105-119.

9. [9]	Kadlec R.H and Knight R.L. (1996), Treatment wetlands, Boca Raton: CRC Press.

10. [10]	Langergraber G. (2003), Simulation of subsurface flow constructed wetlands: results and further research needs, Water Science and Technology, 48, 157-166.

11. [11]	Marsili-Libelli S. and Checchi N. (2005), Identification of dynamic models for horizontal subsurface constructed wetlands, Ecological Modelling, 187, 201-218.

12. [12]	Mays P.A. and Edwards G.S. (2001), Comparison of heavy metal accumulation in a natural wetland and constructed wetlands receiving acid mine drainage, Ecological Engineering, 16, 487-500.

13. [13]	Mitchell C. and McNevin D. (2001), Alternative analysis of BOD removal in subsurface flow constructed wetlands employing Monod kinetics, Water Research, 35, 1295-1303.

14. [14]	Pu P.M., Wang G.X., Li Z.K., Hu C.H., Chen B.J., Cheng X.Y., Li B., Zhang S.Z. and Fan Y.Q. (2001), Degradation of healthy aquatic ecosystem and its remediation: theory, technology and application, Journal of Lake Sciences, 13, 193-203.

15. [15]	Reed S.C and Brown D. (1995), Subsurface flow wetlands—a performance evaluation. Water Environment Research, 67, 244-250.

16. [16]	Rousseaua D.P.L., Vanrolleghemb P.A. and Pauw N.D. (2004), Model-based design of horizontal subsurface flow constructed treatment wetlands: a review, Water Research, 38, 1484-1493.

17. [17]	Tanner C.C, Clayton J.S, Upsdell M.P. (1995), Effect of loading rate and planting on treatment of dairy farm wastewaters in constructed wetlands - I. Removal of oxygen demand, suspended solids and faecal coliforms, Water Research, 29, 17-26.

18. [18]	Wen Y. and Zhou Q. (2007), Horizontal subsurface flow constructed wetland models, Chinese Journal of Applied Ecology, 18, 456- 462.

19. [19]	Wittgren H.B and Maehlum T. (1997), Wastewater treatment wetlands in cold climates, Water Science and Technology, 35, 45-53.

20. [20]	Wynn T.M. and Liehr S.K. (2001), Development of a constructed subsurface-flow wetland simulation model, Ecological Engineering, 16, 519-536.

21. [21]	Xu, F. (2011), Dynamic ecosystem health assessment for Baiyangdian Lake, China, Dissertation for the Doctoral Degree. Beijing: Beijing Normal University.