South Lake Ecological Demonstration Area （EDA） in Tangshan established after a series of ecological restoration projects had a decisive function on the ecological environment of Tangshan, but its susceptibility was relatively high as an artificial landscape. The principles and the methods of landscape ecology were applied to ecological risk assessment of this area, based on historic record, remote-sensing data, GIS and dynamic-monitoring date. The ecosystem was defined as risk receptor, and main risk sources defined and analyzed including drought, sandstorm, pollution and soil erosion in this landscape region. This study evaluated the probability and distribution of each kind of risk sources and applied ecological index in exposure and hazard analysis, and Analytical Hierarchy Process （AHP） method was used to calculate risk weight. This area was divided into 351 plaques by using GIS, and then combined probability and comprehensive ecological loss to calculate comprehensive risk value of each risk area. According to the risk value of each risk area, the region in South Lake EDA was divided into four levels of risk zones and completed drawing of ecological risk assessment in the region. The result of ecological risk assessment provided scientific basis for environmental risk management of South Lake EDA in Tangshan.
Research of Environmental Sciences