Fuzzy Hierarchy Comprehensive Evaluation of Water Quality in Different Lake Regions of Taihu Lake

Abstract:

Taihu Lake can be divided into several different lake regions such as bay area, center area, lakeshore area and etc. according to the hydrodynamic characteristics and the lake morphology. In the year of 2010, water quality were measured in 17 sampling points, consisting of 8 points in the Zhushan Lake bay, 3 points in the western lakeshore area, and 6 points in the center area. The fuzzy hierarchy comprehensive evaluation model was used to assess the water quality in different lake regions on the basis of the measured data. This method is a combination of fuzzy evaluation to determine membership degree and Analytic Hierarchy Process (AHP) to determine weight. AHP can be further reduced to these steps such as the goal defining, hierarchy establishing, judgment matrix building, hierarchy single ranking, hierarchy general ranking and uniformity inspecting. The results show that water quality of Zhushan Lake bay is in class Ⅴ except for some points in class Ⅳ. Water quality of center area is between class Ⅱand Ⅳ, and that of lakeshore area is in class Ⅴ. The water quality assessment on the different lake regions by this method can more practically reflect the water environmental status of Taihu Lake. This works contributed to the improvement of water quality assessment exactness and lake eutrophication controlling in the situation of the lake with large area.

• Periodical: Advanced Materials Research (Volumes 356-360)
• Pages: 844-850
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.356-360.844
• Online since: October 2011
• Authors: Li Gu, Zu Lin Hua, Bo Hong, Ya Wei Li, Yan Gen
• Keywords: Different Lake Regions, Fuzzy Hierarchy Analysis, Taihu Lake, Water Quality

References

[1] R. Zhang. Studies on the water environmental characteristics of the grass-type zone and the algae-type zone of Lake Taihu. Nanjing: Hohai University (2006).(In Chinese)

[2] S.D. Wu, and H.F. Zhao. Monitoring analysis method of water and wastewater (fourth edition). (China Environmental Science Press, Beijing 2005). (In Chinese)

[3] X.C. Jin, and Q.Y. Tu. Survey specification of lake eutrophication (second edition). (China Environmental Science Press, Beijing 1990). (In Chinese)

[4] S.J. Song, and W.C. Zhou. Research of Soil and Water Conservation, Vol. 14 (2007), p.128. (In Chinese)

[5] H.L. Song, X.W. Lv, and X.N. Li. Journal of Safety and Environment, Vol. 6 (2006), p.87. (In Chinese)

[6] J. Zuo. Systems Engineering, Vol. 6 (1998), p.56. (In Chinese)

[7] Z.S. Xu. Systems Engineering-Theory & Practice, Vol. 18 (1998), p.38. (In Chinese)

[8] Q. Chen, and H.C. Wang. Systems Engineering, Vol. 14 (1996), p.18. (In Chinese)

[9] L. Yang, and D. Zhang. Computer and Applied Chemistry, Vol. 18 (2001), p.84. (In Chinese)

[10] G.Y. Li. China Business and Market, Vol. 4 (2004), p.40. (In Chinese)

[11] S.Y. Wen, Z.Q. Ma, Z.H Zhou, etc. Resources and Environment in the Yangtza Basin, Vol. 9 (2000), p.196. (In Chinese)

[12] S.F. Liu, H.L. Yuan. Journal of Shaanxi Normal University (Natural Science Edition), Vol. S1 (2001), p.132. (In Chinese)

[13] C. Zhang, Y. Xing, Z.P. Huang. Journal of Nanjing Hydraulic Research Institute, Vol. 2(1996), p.133. (In Chinese)