Recognition of managing phase of shelterbelt by remote sensing

The main purpose of this paper is to recognize the managing phase of shelterbelt by remote sensing, which can provide timely information for manager of shelterbelt. In this paper, by using multi-temporal remote sensing images, combined with the theory of management for shelterbelt, a method for monitoring the managing phase of the shelterbelt was established. Taking an area of 10 km×10 km in northern Changchun as examples, we used the TM and ETM images to analyze the managing phase of the shelterbelt in the area, and compared the relative precision resulted from different monitoring period. The results showed that, compared with the results of the annual monitor, the whole precision of three years period was 84.8%, and that in the period of six years was 78.4%. Therefore, based on an overall consideration of computation efficiency, data availability and monitor precision, it is concluded that monitoring result of three years period can not only coincide with the growth and development law of shelterbelt, but also has an acceptable precision.