基于RRM的海岸帶生態(tài)風(fēng)險(xiǎn)評(píng)價(jià)研究
[Abstract]:The coastal zone is located in the transitional zone of the interaction between coastal land and coastal water bodies. It has abundant shoreline, fishery and energy resources, which provides a strong material and energy support for the development of social economy. However, the long-term high-intensity exploitation activities and unreasonable utilization of resources bring great environmental pressure and ecological risk to the coastal zone ecosystem, and the contradiction between marine environment and economic development is increasingly prominent. Scientific and reasonable analysis of coastal zone ecosystem and accurate understanding of the risk sources of coastal zone environmental pollution are beneficial to the analysis of the harm of various risk sources to coastal zone ecosystem and the control of major pollution sources. It can effectively protect the stability and biodiversity of coastal ecosystem and provide long-term protection for the sustainable development of social economy and the improvement of people's living environment. At present, the research on coastal zone ecosystem is mostly focused on ecosystem health assessment, but the assessment of coastal zone ecological risk is less. The existing risk assessment is mainly based on the temporal and spatial changes of land use and landscape pattern to characterize the ecological risk in coastal zone, but it lacks the consideration of the ecological mechanism of risk sources and risk receptors in coastal zone ecosystem. Based on the summary of domestic and international studies on coastal zone ecosystem and considering the factors such as complex land use type and ecosystem structure in coastal zone, the definition of coastal zone scope corresponding to each coastline use type is put forward in this study. Based on the relative risk model (RRM), a risk assessment model for coastal zone ecosystem is constructed, which can quantify the ecological risk in coastal zone and apply it to the actual coastal ecosystem risk assessment. The main risk sources and risk receptors are determined to provide reference and theoretical support for ecological risk management in coastal ecosystem development and utilization.
【學(xué)位授予單位】:大連理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:P748;X826
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