Research On Value Of Ecosystem Services Of Water-level-fluctuating Zone In Three Gorges Reservoir

Ecosystem services is the material basis of sustainable human development and natural capital, Assessment of the Three Gorges Reservoir with the value of ecosystem services, awareness of the importance of the fluctuating zone ecosystems on human welfare.Kaixian county is the largest county which with the distribution of the Three Gorges Reservoir, this paper will focus on Kaixian county.This paper takes kaixian county of chongqing as an example, which first in the basic data collection and field survey on the base of the three gorges reservoir area fell away with Outlines the ecological system, analysis of the ecological system fell away with composition, characteristics and functions. Combined with ecological system service value of kaixian county coefficient, using the ecosystem services value calculation model to describe fall away with ecological system kaixian county service value evolution characteristics of land use and different under the mode of the change of the value. The results are as follows:(1) The water-level-fluctuating zone of Three Gorges Reservoir ecological system is defined in the "water-the first layer ridge line" between belt in the area. With the completion of the four water storage of Three Gorges Reservoir, the water-level-fluctuating zone is fully formed, it is special and complex ecological system, which is also a of the dissipative structure open systems.(2) According to Spatial entities border demarcation,The water-level-fluctuating zone of Three Gorges Reservoir ecological system is divided into farmland ecological system, forest ecological system, grassland ecological system, wetland ecological system, bare rock ecosystems ecological system and urban ecological system; according to the spatial relations level classification, divided into natural ecological subsystem, and the social economic system and the people-to comprehensive subsystems, it is good for The water-level-fluctuating zone which as a of the dissipative structure of open system fully interacts with the outside world of matter and energy flow and transformation of the ecosystem and human interference and maintenance.(3)Before the fall away into library kaixian county with ecological system service value of237.6602million yuan, after the natural succession into library wetland pattern and " reservoir which contains the reservoir " model of ecological system service value respectively for530.9235million yuan and482.0266million yuan,can see into the library kaixian county fell away with ecological system into library was higher than before. And comparing with different land use mode, the ecosystem service value of the two modes into the library is also in the forefront of the wetland ecological system,has a higher eco-efficiency than the general ecosystem., it shows that the wetland ecological system is better than the general ecological system. Therefore, is also proved that the importance of artificial wetlands to maintain and strengthen the Reservoir Area Consumers fall with wetland protection. The establishment of Kaixian urban wetland ecological reserve is worth adopting.(4) High ecosystem service value mode sort for:wetland model> reservoir which contains the reservoir mode> other mode, that is, if taken wetland ecological use patterns as an example,The water-level-fluctuating zone of kaixian county provides the highest value of services.’Library-Library" mode is superior than several other, this also showed the water-level-fluctuating ecological system is a opening system which with ecological system is a certain structure and functions of the self adjusting, but it has a limit, if beyond the limit, the system will collapse, under the action of artificial, the water-level-fluctuating zone of Three Gorges Reservoir has the characteristic of at the hight of speed,wide range, off-season and so on.the plant is difficult to adapt and die, resulting in the degradation ability of the water-level-fluctuating zone ecological system,the occurrence of environmental problems. Therefore, before the water-level-fluctuating zone ecological system formed astable, appropriate, and reasonable intervention is reasonable. It confirms that the results of Kaixian county for Land and Water Planning is relatively reasonable.