Research On Information Extraction And Change Detection Methods Of Artificial Wetlands In The Yellow River Delta

Wetland is an important part of the surface ecosystem, and the distribution of the wetland lies in the middle zone between the terrestrial ecosystem and the aquatic ecosystem.Because of the special environment of wetland, many wetland organisms have their own characteristics,Human activities can not be separated from the wetlands, especially in the coastal areas of human activities and wetlands have a close relationship.Constructed wetland is an important part of wetland and the artificial wetland has a close relationship with human activities.Constructed wetlands are now widely used in aquaculture, aquatic crop cultivation and sewage treatment and other aspects of,Especially in the increasing scarcity of water resources today, the artificial wetland sewage processing function. In recent decades to scholars around the world study hot.Among them, how to use the function of constructed wetland reasonably and not to destroy it is an important direction for the research of artificial wetland.So it is very necessary to study the information extraction method of artificial wetland.The effective method is very important for the timely and accurate extraction of the constructed wetland.But human on the wetland information extraction research only decades of development history, and initially study of wetland extraction are often limited to natural wetlands, the artificial wetland information extraction studies were limited, and the artificial wetland information extraction research mostly needle for single features extraction research.Secondly, the traditional wetland information extraction method is difficult to carry out accurate and timely extraction of wetland information.With the development of 3S technology, it has been widely used in the research of wetland information extraction, and has made a breakthrough, and based on the 3S technology, the research of wetland information extraction has become the main research direction.In addition, most of the current scholars study the extraction method of the whole wetland information, but not the artificial wetland,Therefore, in the process of extraction, the extraction accuracy of the artificial wetland information is neglected in order to pursue the overall accuracy or the extraction accuracy of a single object.For this purpose, this paper focuses on the information extraction of constructed wetlands, taking the modern the Yellow River Delta as an example,By visual solution translation, decision tree classification, texture analysis a variety of classification method combined with the hierarchical classification method, oriented object information extraction methods and the development of earlier supervised classification three information extraction method of each wetland type artificial wetland information extraction were studied.Respectively of the three methods of information extraction results are accuracy analysis, the comparison of the three kinds of classification methods, and the overall classification accuracy and the single object classification accuracy, found relatively high classification accuracy and classification method, provides a certain foundation for the future research.In comparison of classification accuracy based, select overall higher accuracy of classification methods of 1992, 2005 and 2014 in the Yellow River Delta wetland information for the change detection, analysis of the artificial wetland mainly the changing trend and reason, the modern Yellow River Delta wetland information extraction to provide certain reference.In the research of artificial wetland information extraction method, the OLI data of the Yellow River delta was used in July 2014, and the feature points were selected to analyze the accuracy of the classification results.In the process of the dynamic monitoring of the information of constructed wetlands, the data of the Yellow River Delta in June, July, the Yellow River Delta TM data and OLI data of delta in July 2014 were used in the process of the Yellow River Delta TM,The dynamic monitoring of constructed wetlands in the Yellow River delta was carried out by selecting the object-oriented, and the overall change trend of the types of constructed wetlands in the Yellow River Delta during 1992-2014 was obtained.