湿地遥感研究进展
作者简介:张树文(1955-),男,吉林长春人,研究员,博士生导师,主要从事土地系统变化科学和遥感与地理信息系统应用研究。E-mail: zhangshuwen@neigae.ac.cn
收稿日期: 2013-01-02
要求修回日期: 2013-03-09
网络出版日期: 2013-06-13
基金资助
中国科学院战略性先导科技专项子课题(XDA05090310)、国家重点基础研究发展计划(2010CB95090103)资助
Application of Remote Sensing Technology to Wetland Research
Received date: 2013-01-02
Request revised date: 2013-03-09
Online published: 2013-06-13
Copyright
张树文 , 颜凤芹 , 于灵雪 , 卜坤 , 杨久春 , 常丽萍 . 湿地遥感研究进展[J]. 地理科学, 2013 , 33(11) : 1406 -1412 . DOI: 10.13249/j.cnki.sgs.2013.011.1406
Wetland is one of the most important ecosystems, and it has high social benefit, economic benefit and scientific research value. However, wetland resources are taking on a heavy pressure because of various natural and anthropogenic factors. The degradation of the wetland quality and quantity has aroused widespread concerns. To conserve and manage wetland resources, it is important to monitor wetlands and their adjacent uplands. Satellite remote sensing has several advantages,such as saving time and labor, multi-temporal, multi-platform, containing large amount of information and so on,for monitoring wetland resources, especially for large geographic areas. This review summarizes the literature on satellite remote sensing of wetlands, including the data source of remote sensing images used in wetland study, remote sensing classification methods of wetland, the survey of wetland, wetlands ecology and the survey of wetlands environment. Nowadays, Landsat TM, Landsat MSS, and SPOT images are the major satellite images that have been used in wetlands research; Other images including NOAA AVHRR, IRS-1B LISS-II, MODIS images and radar images, and JERS-1, ERS-1 and RADARSAT images. Early work with satellite imagery used visual interpretation for classification, which is still used widely today. The most commonly used computer classification methods are unsupervised classification and supervised classification. It is difficult to make great progress on improving the accuracy of remote sensing classification because of “the same things with different spectrums” and “different things with the same spectrums”. However, the appearance of some new algorithms(decision tree, support vectormachine, BP neural network) as well as the use of ancillary data (soil data, elevation or topography data) improve the satellite remote sensing classification of wetlands to some extent. Also the integrated use of multiple classifications becomes a new trend, which can also increase the accuracy of the satellite remote sensing classification to some extent. Remote sensing is also used widely in the surveying of wetland resources, estimating vegetation biomass of wetland, assessmenting wetland ecosystem health and so on, which can save time and labor greatly. At the same time, this paper points out five shortcomings existed in wetland research by remote sensing technology and prospects its future development from six aspects.
Key words: wetland; remote sensing; RS image
The authors have declared that no competing interests exist.
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