STUDY ON ECOLOGICAL DAMAGE ASSESSMENT AND RESTORATION OF COASTAL ZONE BASED ON THE PSR/RS MODE

摘要

The ecological security of coastal zone is an important link to ensure the sustainable development of coastal economy.The frequent human activities have caused a series of damage to the coastal zone ecology. Therefore, a coastal zone ecological dam-age assessment method based on the PSR/RS model is designed, and the restoration scheme is developed according to the damage degree. Through the models of pressure,state and response, the evaluation index system is obtained by comprehensively considering operability, hierarchy and dynamics, and formulat-ing the target layer, criterion layer and index layer. The analytic hierarchy process and entropy weight method are comprehensively used to determine the weight of each index. The comprehensive evaluation value is calculated through the formula, and the eco-logical security status classification is designed to complete the evaluation. In the restoration scheme, the coastal zone ecology is regulated by adjusting the economic structure, repairing the ecological damage of the coastal zone,and constructing the ecological compensation mechanism of the coastal zone. The simulation results show that the comprehensive eval-uation value obtained by using the proposed method fluctuates between 0.51~0.61, while the comprehen-sive evaluation value in the real situation has been kept between 0.40~0.47. It proves that the repair method designed in this paper is feasible and effec-tive in the repair of coastal zone damage.