Model construction and simulation analysis of ecological corridors in landscape environment planning

Urban sprawl and irrational development and utilization of land have led to many ecological problems such as ecosystem degradation, and the construction of ecological corridors is of great significance for the optimization of environmental spatial pattern and green development. This study identifies the ecological sources and comprehensive resistance in the landscape environment planning area based on the circuit theory method, and then analyzes the optimal ecological corridor model in the planning area by combining the shortest circuit algorithm and the minimum impedance path algorithm, to realize the construction and simulation of the ecological corridor network structure model. The simulation results show that the ecological patches with an area larger than 4km² and concentrated and continuously distributed in the planning area of Hanjiang Eco-city are identified as the ecological sources for the construction of ecological corridors, and a total of 21 ecological source patches are obtained, which is much higher than that of the ecological sources in the original ecological corridors. Meanwhile, it is found that the optimized ecological network of the optimized ecological corridor network structure constructed in this paper has an increased line point rate (19.38%) and network connectivity (9.15%) compared with the original ecological corridor. This study has important ecological support significance for maintaining the ecological protection pattern and green development of complete systems in ecological environment.