The Study Of Lake Aslykul (Southern Cis-Ural) Area Dynamics By Processing The Satellite Images On The Basis Of The Algebraic Approach

We use the remote sensing data from Lake Aslykul demanding appropriate processing and special mapping technologies. A mathematical model of image processing is proposed, based on numerical optimization of a multi-parameter nonlinear function with linear constraints with respect to the standard, the latter being set by the expert for the selected image at the beginning of processing. As the image, the satellite imagery data from Lake Aslykul, obtained by the Landsat-5 satellite during 10 years since 1987, are used. The parameters of the measuring function of the technical vision system, which are necessary for the numerical measurement of a water body, have been determined. The calculation of the area of the lake and the collection of data are carried out, which are processed by the algebraic and statistical methods. A periodic change in the surface area of the lake was established. The results of the study showed that the lake area increased by 2.5-3 km(2). We suggest that one of the reasons of changing the lake area is tectonic activity.