Production of DEM for Analysis of Microtopographical Features around Balkhash Lake by ALOS PRISM Data

Abstract

The high accuracy DEM was produced from the ALOS/PRISM stereo pair data for the purpose of investigation of the fluctuation in the water level and describing of the past lake area of Balkhash Lake. The characteristics and accuracy of the produced DEM were investigated through the comparative analysis of the SRTM DEM and field survey data. Furthermore, the possibility of the micro-topographical features distribution along the lake shore line was investigated.

Environmental Restoration of Old Juyan Lake Area Based on The Investigation of Micro-topography by Satellite Data

“…The details of this algorithm and the evaluation result were already reported. [1][2][3] Subsequently, gravel bar distribution was extracted and described as digital data through the image interpretation on ALOS pan sharpened data and digitizing. Then, based on the comparative analysis of the digitizing data and DSM data, the elevation and the characteristic of each gravel bar were investigated.…”

“…Especially authors have been investigating the relationship between the analysis result of the past water level change and climate change or human activities based on DSM creation in the Aral Sea and Balkhash Lake as closed lakes. [1][2][3] Since the Aral Sea and Balkhash Lake had the vast water area, the distribution of micro-topographical features which described the past water level was restricted. However, many gravel bars showing the past water level as shown in Fig.2 are distributed over the slope from the altitude of about 900 m to 927 m on the north side of the Tien-e-hu.…”