Re-use strategy of subsided land based on urban space ecological compensation: case study for Xuzhou mining area for example

In this paper, based on a new definition we propose for “urban space ecological compensation” from view of ecology, we summarize the space-time development law of subsided land in Xuzhou mining area, and describe the ecological degradation characters of subsided land and the present status of land-use, obtaining a conclusion that the present reclamation mode can not meet the existing conditions of subsided land, such as large subsided area and dynamic change, large volume of accumulated water, and complex landform. In addition, the standard of reclamation was changed in new reclamation regulation. Therefore, we analyze the internal relation between subsided land and urban space structure with the idea of urban space ecological compensation and try to discover the great value of ecosystem service function of subsided land, which can help to realize ecological balance of urban space. At last, we put forward a strategy for re-use of subsided land based on the principle of ecological compensation, that is, “the minimal manual intervention” and “the largest ecological efficiency”, in which subsided land is regarded as a new resource that can promote urban-rural harmonious development and sustainable development in mining area.