Evaluation On Sustainable Utilization Of Water Resources In Wuhan Urban Circle Based On The Theory Of Ecological Footprint

Wuhan city circle is treat as a beautiful and prosperous place because of its water system.Due to the developed water system, water resources are very rich in the Wuhan city circle. However, in recent years development, reserves and utilization of water resources in Wuhan city circle exhibited in the internal situation is not ideal, the problem of water pollution, waste of water resources and other aspects of the structural imbalance has caused adverse impact to the local social and economic development. Based on this, adjusting the water usage and protecting water by law has become a top priority for the sustainable development of Wuhan city circle and must cause high attention.On the careful analysis of predecessors' research results, according to the characteristics of water resources in Wuhan city circle, with the introduction of the model of water resources ecological footprint and the model of water resources ecological carrying capacity, this article sets up an evaluation system of water resource utilization. Based on this, this paper analyses 2003—2012 water resources data of Wuhan city circle, evaluates the potential for sustainable development of local water resources from a quantitative point of view. Meanwhile, by comparing two data in 2003 and 2012 from each city in the city circle, this paper objectively and accurately evaluates the consumption on water of each city. Finally, through the utilization of the regional economy, population and water resources to be combined, this article targets to the problems one by one and puts forward reasonable suggestions for improvement. Results of this study, not only provide efficient measures for sustainable development of water resources in Wuhan city circle, but also provide a positive reference for the development and implementation of the relevant policy. The main conclusions of this paper are as follows:(1)From the dynamic analysis of water resources ecological footprint,2003-2012 the per capita water resources ecological footprint in Wuhan city circle shows an upward trend on the whole, indicating that the demand for water is growing for the development of Wuhan city circle. Comparison from two data in 2003 and 2012 shows that, in the cities of Wuhan city circle, the per capita water resources ecological footprint in Wuhan has decreased, the per capita water resources ecological footprint in remaining cities has increased, showing that during this period the consumption on water in most of the cities in the city circle has increased, which is mainly due to the social development demanding for more water and the low utilization of water resources.(2)From the dynamic analysis of ecological water resources carrying capacity, 2003-2012 the per capita water resources ecological capacity in Wuhan city circle fluctuations, the per capita water resources ecological carrying capacity of 2010 is the highest,2.017hm2, the per capita water resources ecological carrying capacity of 2006 is the lowest,0.7935hm. Research results are related to the precipitation and water resources in Wuhan city circle, in 2006, the precipitation in Wuhan city circle reduces, total water resources are the minimum, so the per capita ecological carrying capacity is minimum and in 2010 rainfall in Wuhan city circle is abundant, total water resources are the highest, so the per capita water resources ecological carrying capacity is the largest. Comparison from two data in 2003 and 2012 shows that, the per capita water resources ecological carrying capacity of cities in the city circle also has declined, which is mainly due to the reduction of water resources in 2012 compared to 2003.(3)From the dynamic analysis of ecological surplus/deficit of water resources, 2003-2012 water resources in Wuhan city circle are in surplus state, the highest per capita water resources ecological surplus is 2010,1.1866hm2, the lowest per capita water resources ecological surplus is 2011,0.024hm2, indicating that water resources in Wuhan city circle are in a state of sustainable utilization in general. Comparison from two data in 2003 and 2012 shows that, the number of cities in surplus state in city circle increases from one to six, indicating that as the economy continues to develop, each city in the Wuhan city circle needs more water, water resources in some cities cannot meet the needs of economic development will not be conducive to the sustainable development of the region.(4)From the dynamic analysis of ten thousand yuan GDP water resources ecological footprint,2003-2012 the ten thousand yuan GDP water resources ecological footprint of Wuhan city circle is continuing a decreasing trend, which decreases from 0.6728hm2 in 2003 to 0.1975hm2 in 2012, decreases 70.6%, indicating that the Wuhan city circle continuously improves the utilization efficiency of water resources and the construction of water-saving social has achieved certain results. Comparison from two data in 2003 and 2012 shows that, every ten thousand yuan GDP water resources ecological footprint of cities in circle cityis also showing a significant downward trend, meaning that while the economic of cities in city circle achieves sustainable development, utilization of water resources has been significantly improved.(5)According to the unreasonableness appeared in the development and utilization of water resources in the Wuhan city circle, this paper proposes a reasonable adjustment measures:strengthen water pollution treatment, restore aquatic ecosystems; optimize industrial structure, rationally adjust the structure of water; scientifically plan industry layout, encourage the rational allocation of water resources; improve the utilization efficiency of water resources.