The study of lakes dynamic change based on RS and GIS –Take DaLiNuoEr Lake as an example

In the study, TM images in eight periods was the data source, adopted RS and GIS technology, threshold value method, deference value and other methods,Statistics the water area of Dalinor from 1995 to 2009 in past 15 years. By establishing lake's Digital Elevation Model (DEM), it was analyzed dynamic change of Dalinor lakes volume in nearly 15 years. In this 15years, Dalinor lake's area narrowed from 246.7km2 in 1995 to 218 km2 in 2009, Lake area reduced 28.7km2, The average decrease speed was 2.05 km2 / a. The total volume narrowed from 4359821563.03 m3 in 1995 to 3889917491.37 m3 in 2009, the total volume reduced 469904071.66 m3, the average decrease speed was 33564576.55 m3 / a. Lake area and volume declined sharply.