| Effects of landscape on draught occurrences in the Songnen Plain — A case study using Nong’an county as its subject |
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| DOI：10.7606/j.issn.1000-7601.2005.01.34 |
| Key Words: land use landscape field landscape diversity Nong'an County Songnen Plain |
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| Abstract: |
| Landscape structure and function are the major aspects of landscape ecology and landscape has hierarchical structure. The paper describes the dynamic pattern of the landscape represented by Nongan county standing in the Songnen plain from the angles of land use and landscape, and adopts landscape index to analyze land use landscape in accordance with remote-sense and image information; it uses diversity index to depict the dynamic structure of landscape according to the statistic data of the crop-planted areas in various years. On the basis of the crop area suffering draught in various years, and the meteorological data, it systematically analyzes the effects of the dynamic landscape of land use on draught disaster occurrence, pointing out that improper land use and crop arrangement are the major reasons for frequent draught occurrence in the region. |