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Proceedings Paper

Monitoring grassland ecosystem degradation using EOS/MODIS data in North China
Author(s): Lipeng Jiang; Zhihao Qin; Liping Lu; Wen Xie; Wenjuan Li
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Paper Abstract

Several sandstorms invading the capital of China in recent years cause many concerns to the issues of grassland ecosystem degradation in arid and semiarid grassland region of north China. Actually the degradation can be viewed as the decrease of primary productivity in the grassland. This provides the possibility to monitoring the degradation using satellite remote sensing technology. In the study we present our experiences in conducting the monitoring of grassland ecosystem degradation in north China. Using the EOS/MODIS data, we develop an applicable method for the monitoring on the basis of net primary productivity (NPP). We assume that there is always a turf without degradation in the area of the same hydrothermal condition and type of grassland. We then use the NPP of the turf to determine the level of degradation in this area. The grassland region in north China can be divided into a number of small sub-regions for the determination and the division of sub-regions can be done according to the types of grassland. As far as every sub-region is concerned, we take the max NPP as the base line to determine the degradation of other pixels in the sub-region. The degradation can be graded into five levels: serious degradation, high degradation, medium degradation, light degradation and non-degradation. Finally we apply the method to analyze the spatial characteristics of grassland degradation in north China in the year 2005. The results show that the situation of grassland degradation in north China is very serious. 95.57% of the grassland in north China has suffered from deterioration to various levels, among which serious degradation, high degradation, medium degradation and light degradation account for 41.06%, 33.52%, 11.72% and 9.28% of the total, respectively.

Paper Details

Date Published: 3 October 2006
PDF: 8 pages
Proc. SPIE 6366, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology VI, 63661V (3 October 2006); doi: 10.1117/12.689414
Show Author Affiliations
Lipeng Jiang, Nanjing Univ. (China)
Zhihao Qin, Nanjing Univ. (China)
Chinese Academy of Agricultural Sciences (China)
Liping Lu, Nanjing Univ. (China)
Wen Xie, Nanjing Univ. (China)
Wenjuan Li, Umeå Univ. (Sweden)

Published in SPIE Proceedings Vol. 6366:
Remote Sensing for Environmental Monitoring, GIS Applications, and Geology VI
Manfred Ehlers; Ulrich Michel, Editor(s)

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