Tracking Historical Wetland Changes in the China Side of the Amur River Basin Based on Landsat Imagery and Training Samples Migration
| Autor: | Hairong Pan, Xuechun Li, Jinxia Liu, Qiande Zhu, Mingming Jia, Yining Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Sustainable development
training samples migration geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Science 0211 other engineering and technologies Drainage basin Wetland 02 engineering and technology Land cover 01 natural sciences Training (civil) Sanjiang Plain Human settlement General Earth and Planetary Sciences Environmental science Paddy field Physical geography Amur River Basin random forest 021101 geological & geomatics engineering 0105 earth and related environmental sciences historical wetlands |
| Zdroj: | Remote Sensing, Vol 13, Iss 2161, p 2161 (2021) |
| ISSN: | 2072-4292 |
| Popis: | In the recent decades, development of agricultural and human settlements have severely affected wetlands on the China-side of the Amur River Basin (CARB). A long-term holistic view of spatio-temporal variations of the wetlands on the CARB is essential for supporting sustainable conservation of wetlands in this region. In this study, a training sample migration method along with Random Forest classifier were adopted to map wetland and other land covers from two key seasons image collections. The proposed classification method was applied to Landsat images, and a 30-m resolution dataset was obtained, which reflected the dynamic changes of historical wetland distribution on the CARB region from 1990 to 2010. As the accuracy assessments showed, land cover maps of the CARB had high accuracies. The classification results indicated that the wetland area decreased from 89,432 km2 to 75,061 km2 between 1990 and 2010, with a net loss of 16%, which was mainly converted to paddy field and dry farmland, and the changes were most obvious in Sanjiang Plain and Songnen Plain. This suggests that agricultural activities are the main cause of wetland loss. The results can provide reliable information for the research on wetland management and sustainable development of the society and economy in the CARB. |
| Databáze: | OpenAIRE |
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