Monitoring Of Wetland Information Change In Fujin City Of Heilongjiang Province Based On Remote Sensing Technology

Wetland is an area of very wet, muddy land. Wetland is composed by water and soil. As we know, water is a kind of non-renewable resources, and soil, is the material basis for the survival of plants and animals. Wetland in which area between water and lands the part of the transitional zone. The role is immeasurable, but the world’s only existing wetland area to the total area of less than10percent of Earth. These years, with our enhanced technology, all accomplishments by a substantial loss of natural resources and the destruction of the natural environment for cost, some of the loss we can make up, but some of them we have to spend more time to repair. In recent ten years we advocate to encourage the discovery of recyclable and renewable resources, since that people realized the importance position of wetlands.Fujin, a city Heilongjiang Province is the main object in this study. Fujin wetlands as an important part of the Sanjiang Plain has important research value, in this study, to use TM/ETM+/OLI remote sensing images as a data source, were extracted the1995,2008to2014in the study area Fujin City, Heilongjiang Province different types of wetlands and wetland area were compared. Drawn from the1995,2008to2014nearly20years, Fujin artificial wetlands, wetland, dynamic changes lake wetland area, the use of object-oriented approach to extract wetlands on Fujin wetland information were extracted, combined with relevant data and the reasons for the Fujin wetland, marsh wetlands, lakes and wetlands area changes detailed analysis, were compared between the same type of information on changes in wetlands.To conclusion, in1995,2008,2014Fujin wetland study area, wetland area showed an increasing trend, wetlands area, lakes and wetlands area decreased; achievements made in the paper are the following:(1) This study extracted Fujin wetland area used TM/ETM+image data/OLI three kinds of sensors acquired, including on October3,1995strip number114/27and October10,1995strip Number two King TM images were115/27image registration, for June24,2008strip number114/27and June15,2008strip number115/27two ETM+images for King go strip processing, and handling good TM, ETM+images and July3,2014strip number114/27and June24,2014strip number OLI images115/27, the three-year total select6remote sensing images are reference images and set its feather radius mosaic images. It carried out according to the study area Fujin vectored image cropping area chart.(2)After pretreating1995TM images,2008ETM+images,2014OLI images data, using the way of object-oriented classification ENVI extraction method in the study area Fujin wetlands to divide and feature extraction. First, the study area for remote sensing image segmentation and multi-scale set its threshold value of50。 Second, the definition of various types of wetlands from1to5samples for supervised classification, and classification method using the confusion matrix accuracy assessment were obtained1995years,2008,2014wetlands extracted each year overall accuracy was84.5839%,93.45455%,92.1212%, Kappa coefficients were0.7722,0.8365,0.8351.(3) By using ENVI object-oriented feature extraction on wetlands, according to the characteristics of different images in different bands bands wetlands object classification, and changes Fujin wetland area for nearly20years monitoring. Conclusions,1995,2008,2014Fujin wetland study area, wetland area showed an increasing trend in the area of wetlands, lakes and wetland area decreased.(4) From1995-2014, the use of object-oriented extracted plaque dispersion Fujin lake wetland area was gradually decreasing state; This shows that the geographical characteristics of lakes and wetlands area was increasingly concentrated distribution trends; wetlands discrete index increased slightly in2008, indicating that the distribution of geographic features on the annual distribution of wetlands was crushed, wetlands plaque density index plunged in2008can also be explained, the annual swamp wetland density is small, and loose;1995-2014wetland plaque density index and an upward trend, indicating the extent of the geographical distribution of Fujin wetland focused more and more, by comparing the plaque dispersion can be drawn in2014Fujin most concentrated wetland distribution, dispersion is minimized.