科研之友
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摘要
Protecting traditional villages has gradually become the consensus of the whole society due to the announcement of the fourth batch of protection lists in China. Traditional villages are the product of the longterm interaction and organic fusion between human and natural environment. Such natural and ecological environments as the surrounding farmlands, mountains, forests and ponds maintain the production and living activities of traditional villages. However, against the backdrop of rapid urbanization after reform and opening up, the ecological environment around the villages is being threatened by increasingly serious erosion because of continuous urban and rural constructions. Urban and rural constructions also bring great challenges to the protection of traditional villages. We first define the concept of ecological erosion in traditional villages. After applying the theory of erosion dynamics, we analyze four ecological erosion ways, including self- ecological erosion, external ecological erosion, sudden ecological erosion and ecological erosion restoration. We also put forward four theoretical models of ecological erosion evolution. At the same time, according to analysis of the satellite images of ecological patches in different years, we take the traditional villages in the Pearl River Delta as the research case, analyze the ecological erosion based on various times and areas, discuss the evolvement law of ecological erosion and its temporal and spatial evolution characteristics in traditional villages under rapid urbanization. We summarize four models of ecological erosion in traditional villages, including urban construction exterior invasion mode , village construction expansion model , road traffic occupation mode and comprehensive development model . As an effort to enrich and deepen the researches on traditional villages from ecological perspective, we provide an important reference for the protection and planning of traditional villages. ? 2018, Science Press. All right reserved.
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