TAILIEUCHUNG - Analysis of Water Pollution and Ecosystem Health in the Chao Lake Basin, China

As a next step, we investigate whether the emission elasticity of the population variable changes with population size. Our second model, for which results are reported in column II, therefore allows for a non-linear relationship between population and pollution emissions by including population squared (POP2 ). The linear term becomes statistically insignifi- cant, which suggests that the relationship is not quadratic. 4 We therefore only include the linear population term in the estimations that follow. Similarly, we have tested for non-linear relationships of the other explan- atory variables, but have not found relevant evidence. . | Analysis of Water Pollution and Ecosystem Health in the Chao Lake Basin China Jin Honga b Xiumei Guob Dora Marinovab and Dingtao Zhaoc a School of Humanities and Social Sciences University of Science and Technology of China b Institute for Sustainability and Technology Policy Murdoch University Department of Management Science University of Science and Technology of China Email hongjin@ Keywords Climate change Environmental health Government policy River basin Sustainability EXTENDED ABSTRACT Water crisis is one of the greatest environmental challenges that China is currently facing. Since the 1970s lakes and rivers in China have been undergoing increasing water deterioration. By the 1990s some main water basins have been seriously polluted causing China s central government to initiate the so-called three rivers and three lakes Liaohe Huaihe and Haihe rivers and Taihu Chaohu and Dianchi lakes project which is aimed at alleviating or solving water pollution in these water basins. Chao Lake or Chaohu see Map 1 one of the targeted water basins is the most polluted lake in China. The article first analyzes the status quo of water pollution in the Chao Lake basin including soil erosion pollutants and nutrient concentration pollution from fertilizers and chemicals industrial pollution and the condition of the water body. Following this the authors develop an exploratory model to understand the basic reasons causing water deterioration including natural and human-made factors. The elements of the model include natural features population residential activities economic activities culture and education and governance. The paper argues that the restoration of the Chao Lake ecosystem needs a comprehensive policy and governance model at a regional and provincial level which should also build on the implementation of a national sustainability strategy for China. This will allow China to achieve the goals of its recently adopted National .

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