Study On Ecological Safety Evaluation And Warning Of Wetlands In Tumen River Watershed Based On The Landscape Pattern

Wetlands, forests and oceans form the three global ecosystems. Wetlands are the natural integration of aquatic and semi-aquatic creatures in a wet environment, and have a unique structure and function. Wetlands are an important natural resource and one of the most important environments for human survival. They not only offer the raw materials for human life and human production but also play an important role in ameliorating weather conditions, flood storage, and the control and reduction of environmental pollution. Wetlands have thus been called the "kidney of the earth",Global and regional problems such as environmental pollution, soil erosion and so on, have become more and more serious with the rapid development of human society. These problems create a serious threat to society, economic development and perhaps even human survival. People are discovering it is not military or political activity which threatens to restrict economic development, but ecological crises which are creating long term effects. Also, people are gradually realizing that ecological stability is critical to both broadscale ecosystem integrity and guaranteeing sustainable development. Is the region or country other ecological safety of the carrier and the foundation. The development of human society depends on creating sustainable development with a system which secures the survival of ecological systems. Therefore, the study of ecological sustainability has become a field of concern.The Tumen River, bordering China, North Korea and Russia, is one of the key international rivers in China. Multinational cooperation in the area’s development reflects China’s rapid economic improvement, yet development impacts and damages the environment in a variety of ways. This study provides a scientific basis for sustainable development within the environment of the Tumen river basin using sound ecology. In this study, we used the Tumen River watershed’s wetland ecological status for the purpose of building a wetland ecology evaluation system based on a pressure-status-response (PSR) concept model, using landscape scale data from1976,1990,2000and2010combined with3S technologies (remote sensing, geographic information systems, global positioning systems). We used an expert evaluation index combined with an AHP evaluation to give weight to various parameters, and determined a final comprehensive evaluation in the use of a logistic growth curve model for each index based on the assessment of single index. The study created a system in which the ecological status of the area was classified as0.650and0.620in1976and1990, respectively and classified the area as secure. The ecological status was determined to be0.536and0.454in2000and2010, respectively, so the ecological status was considered threatened. This wetland ecological system urgently needs protection. Based on the analysis, we used a grey prediction model to build a wetland ecological status prediction model and did accuracy testing for the model. The simulation error, the correlation, the mean square error ratio, the small error probability were primary and the model accuracy was high enough to make an accurate prediction of the future ecological status of the Tumen river wetland. Finally this study made a prediction for status of the Tumen river basin wetland ecological system over the next20years. The results were0.3903and0.3345looking20years into the future, respectively. The wetland ecological system is in a threatened state, and the trend for the system was toward becoming endangered. As threats to the ecological integrity increase in this area it will need more protection and management to maintain the integrity of the wetland ecosystem.