合肥經(jīng)濟(jì)圈生態(tài)風(fēng)險(xiǎn)評(píng)價(jià)及對(duì)策研究
[Abstract]:Ecological risk is the possible adverse effect of uncertain events or disasters on the ecosystem and its components, which has the characteristics of uncertainty, harmfulness, objectivity and dynamics. Ecological risk assessment is a process of studying the adverse ecological effects that occur or may occur due to exposure to one or more kinds of motivations. The aim is to provide scientific basis for reducing environmental pollution or ecological damage. The research scale of ecological risk assessment has gradually developed into regional ecological risk assessment from simple evaluation of a project or location in the past, which provides theoretical and technical support for further strengthening regional risk management. The Hefei Economic Circle is an economic complex with inherent industrial ties with Hefei, the capital of Anhui Province, as the core and neighboring cities. It is composed of four prefecture-level cities (Hefei, Huainan, Lu'an). Chuzhou City) and 1 county city (Tongcheng City of Anqing City). In recent years, with the rapid development of the urban economy in Hefei economic circle, a large number of people flock to the city, followed by the consumption of natural resources and urban environmental pollution and other problems become more and more prominent and concentrated. Therefore, the economic circle is facing more ecological risks. Based on Pressure-State-Response response (PSR) model, carbon emission calculation method and three-dimensional ecological footprint theory, the ecological environment of Hefei economic circle was evaluated. Through the PSR model, the five cities forming Hefei economic circle are taken as the basic evaluation units, and 24 indexes are selected to construct the ecological risk evaluation index system. The index system is based on the entropy weight method and the positive and negative weights are combined to give weight to the index from the pressure index. Based on the state index and the response index, the ecological risk factors of each prefecture and city in the economic circle are quantitatively evaluated. The results show that since the founding of the Hefei Economic Circle in 2009 to 2014, the number of members of the Hefei Economic Circle has decreased by 1.30 percent in 2010 compared with 2009 and 7.00 percent in 2014 compared with 2013. The ecological risk index of other years has been maintained at 0.20 ~ 2. The factors affecting the ecological risk index are different in different cities of Hefei economic circle. The ecological risk value of Huainan City is mainly affected by the industrial discharge of sulfur dioxide and sewage, and the contribution rate is 64.11. The three factors of land expropriation and the increase of artificial environment have a significant effect, and the contribution rate is 74.87.The ecological risk of Chuzhou is mainly affected by the discharge of industrial sewage and the industrial sulfur dioxide in the pressure index. The contribution rate is 37.860.The ecological risk situation of Lu'an city is closely related to its forestry production activities, and the contribution rate is 34.62.The expansion of light industry in Tongcheng City has become an important factor of natural ecological disturbance. The contribution rate of 67.02.3 industrial waste gas, waste water and dust, as well as urban expansion, is the main factor to increase the ecological risk of Hefei economic circle. This study reveals the ecological risk situation in Hefei economic circle, which has important reference value for the formulation and implementation of a series of scientific ecological planning strategies, and puts forward the following countermeasures: adopting cleaner production technology, implementing ecological compensation, Attention should be paid to greening construction, adjustment of industry and energy structure, development of waste recycling technology and strengthening of ecological environment supervision and management.
【學(xué)位授予單位】:安徽大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:X826
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