Change Research Of Wetlands Over Dorbod Based On The Object-oriented Classification Method

Wetland ecosystems,as one of the three ecological systems of earth can optimize the environment,not only for human offers a wide variety of biological resources,at the same time also has the flood control and disaster reduction,to reduce the pollution of the environment,regulating climate,and many other functions.Wetland ecological system to produce the huge social benefit,economic benefit and ecological benefit for the ecological balance of the earth and the human survival and development is indispensable role.In this paper,located in the hinterland of songnen plain of monggol nationality autonomous county as the research object,using the object-oriented classification combined with visual interpretation methods,based on the study area in 1989,2002 and 1989,Landsat images of the wetland in the third phase of data information extraction and spatial and temporal variation analysis,the area of wetland and mining the social,natural driving factors behind the change,get conclusions as following:(1)Determine the dorbod area wetland types.According to the national standards for the wetland classification and combining all kinds of auxiliary data set up match the research area of wetland classification system,the wetland in the study area is divided into river wetland,lake wetland,marshes and paddy field.(2)Through visual interpretation and object-oriented classification method of combining to wetland information extraction of dorbod region,on the basis of the classification results,using statistical analysis methods of transfer matrix of the time and space changes of wetland area and research,analysis of the wetland area is about 2719.66km2 in 1989,the wetland area is reduced to 1710.49km2 in 2002,the wetland area is 2044.19km2 in 2016.During 1989-2002,the biggest change for river wetland wetland types,variation of91.96%,followed by paddy field and marshes,change the smallest pits for lakes wetland,change rate of 23.54%.In the period 2002-2016 the largest wetland types for paddy field variations in 206.24%;Followed by river wetland,lake wetland,pits or change in the smallest of mire,change rate of 2.25%.(3)Analysis of natural and social driving factors of changes in the wetland,natural factors are mainly the temperature and precipitation,the social driving factors mainly for the population,economy,policy.Nature driving factors is induced by the leading factor in the wetland area changes,and the rapid growth of the population,economy and government policy implementation is a wetland change of inducing factors.Natural and social factors in different dimensions affecting dorbod area of wetland changes.(4)According to the change in the wetlands of dorbod analysis,advances some Suggestions on wetland conservation,improve the wetland management laws and regulations,to speed up the pace of wetland protection legislation;Establish a scientific management mechanism,strengthen the collaboration between the various management mechanism;Giving full play to the advantages of the Internet,promote wetland importance diversity and improve the wetland protection consciousness;Strengthen the wetland research personnel training,repair engineering implementation of wetland resources.