GEOGRAPHICAL RESEARCH ›› 2010, Vol. 29 ›› Issue (6): 997-1004.doi: 10.11821/yj2010060005

• Environment and Ecology • Previous Articles     Next Articles

Situation and evaluation of water environmental quality in Wulingyuan world natural heritage site

LENG Zhi-ming1,2   

  1. 1. The Life Sciences and the Technical Institute, Central South University of Forestry and Technology, Changsha 410004, China;
    2. Business School, Jishou University, Jishou 416000, Hunan, China
  • Received:2010-01-05 Revised:2010-04-18 Online:2010-06-20 Published:2010-06-20

Abstract:

Since China joined in the Convention Concerning the Protection of the World Cultural and Natural Heritage in 1985, 37 Chinese cultural relics and scenic spots have been listed in the world heritages, 7 of which are the natural sites. Every country, the United Nations and other international organizations have attached greater importance to the heritage protection and utilization, which has been a hot cultural issue nowadays. In 1992, Wulingyuan was added into the world heritage list. Due to overexploitation and lack of protection, the water environment has been severely affected and its quality has been degraded gradually since then. Based on the current researches, this paper further explores the level of water pollution and discusses the changing pattern of water environment. Because the water environment is a complex and changeable system, it is difficult to evaluate the water quality by the conventional quantitative method. This paper selects BOD5, COD, TN, TP, As, MnO-4 as evaluation factors, which have greater influence on the environment. Four main spots along the major water systems Jinbianxi and Suoxi are monitored. With fuzzy comprehensive evaluation method, we adopt the standard value of pollutants to calculate the weights, and select the weights according to different pollution levels to further research the degree of water pollution and to explore its changing pattern. The evaluation results show that the water quality of Shuiraosimen, Wujiayukou, and Zicaotan is level II, and the water quality of Laomowan is level III. The evaluation results are basically in agreement with the real monitoring data. On this basis, we put forward countermeasures to improve water environmental quality, which can provide scientific evidence for enhancing water environment quality of Wulingyuan world natural heritage site.

Key words: Wulingyuan, water environmental quality, environment evaluation