Ecological radiation model research in human settlement ecological environment assessment: a case study of Longgang District of Shenzhen City.

The concept of ecological radiation was proposed first time in this study for ecological environmental assessment of human settlement.The GIS technology was used to develop the ecological radiation model(ERM).The urban land was classified into two categories in ERM,including ecological land and construction land.The construction land was viewed as human settlement in the current study.The ecological radiation extension of each land depends on its size and type and the land type was treated as weights in the model.According to the ecological urban construction theory and practical application examples,the ecological land with various sizes has different extension of ecological service,which is represented as radius in ERM.The Longgang District of Shenzhen City was taken as a case study to demonstrate the application of the proposed model.The ERM results showed that the developed model could reflect the effects of ecological land patterns to human settlement and,thereby,provides a new method for ecological environmental assessment of human settlement.