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Proceedings Paper

Remote sensing of landcover changes in Turfan Basin of northwest China using Landsat and ASTER data
Author(s): Hong-lie Qiu; Junping Zhong
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Paper Abstract

Remote Sensing data acquired by various sensors during the last 40 years for the Turfan Basin in northwest China were compiled and processed to map and monitor changes of surface features related to hydrological conditions within the basin. Various image processing techniques were used to map surface features directly or indirectly related to former lake levels and groundwater tables for inferring conditions of the past climate. Special attention has been paid to the distribution of open water body, playa salt crust, waterlogged and salinized soils, and desert vegetation. With improved spatial resolution and more spectral bands, data acquired by ASTER sensor were explored to get additional information for discriminating these surface features. The compiled data indicate that Aiding Lake was a seasonal lake as early as in 1961. For the last 40 years, Aiding Lake has existed as a lake with open water only during the spring and early summer months. The size of the lake water body and timing and duration of the lake phase have varied year to year, suggesting that Aiding Lake is highly sensitive to climatic fluctuations and it is an ideal location for detecting possible impacts of global climatic changes.

Paper Details

Date Published: 25 September 2001
PDF: 6 pages
Proc. SPIE 4548, Multispectral and Hyperspectral Image Acquisition and Processing, (25 September 2001); doi: 10.1117/12.441400
Show Author Affiliations
Hong-lie Qiu, California State Univ./Los Angeles (United States)
Junping Zhong, Xinjiang Agricultural Univ. (China)


Published in SPIE Proceedings Vol. 4548:
Multispectral and Hyperspectral Image Acquisition and Processing

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