Study On Ecology Evolution In Dengkou County Based On Remote Sensing And GIS Methods

Ecological environment problems have become outstanding issues associated with social economic development and people's daily life.Ecological environment construction is written to the country's thirteenth Five Year Forward Planning Program for the first time,and it will become an important task for next few years.This research is based on predecessors' research results,and data is based on TM remote sensing data,meteorological data,and statistical yearbook data.Through ENVI and GIS methods,we analyzed four periods' TM remote sensing data of 1986,1994,2002,and 2011,to find out the characteristic of LUCC,dynamic change of desertification,and the corresponding driving force mechanism of these changes.Also we forecasted the future development trend of local ecological environment.Main research results and innovation points are as follows:1.Weather features for nearly 60 years.The meteorology data is offered by Bayannur Meteorology Bureau.We adopted the longest time scale data r(1954~2014)since modern meteorological records were taken,using modern meteorological statistical methods,such as sliding average value,accumulated analyze,the linear tendency prediction,to analyze characteristic of climate change for nearly 60 years,and forecast the development trend.2.LUCC characteristics and their transformation rules.We did supervision classification of the remote sensing image by ENVI software,and divided the research region into four regions.By using the dynamic analysis model of LUCC,we quantitatively analyzed distribution and change characteristics of LUCC.Through superposition and processing sorting statistics by GIS,we obtained conversion rule between various land use types.3.Distribution characteristics and development trend of desertification.Through dichotormy method,overlay analysis,and mathematical model,we did statistic analysis on the characteristics and evolution of desertification in the region from 1986 to 2011.4.Forecast LUCC and desertification development trend in the next 10 years.We respectively forecasted the LUCC and desertification evolution trend in the next decade,by using the LUCC transformation rules and linear fitting to desertification.5.Quantitatively analysis of the driving factors of LUCC and desertification.Through analysis model as Pearson correlation,canonical correlation,we quantitatively analyzed the driving factors of LUCC and desertification by SPSS.