A Study on the Wetland Dynamic and Its Relation with Cropland Reclamation in Sanjiang Plain, China
文献类型：会议论文
| 作者 | Song, K. S. ; Liu, D. W. ; Wang, Z. M. ; Khan, S. ; Hafeez, M. ; Mu, J. X. |
| 出版日期 | 2007 |
| 会议名称 | International Congress on Modelling and Simulation (MODSIM07) |
| 会议日期 | 2007-09-10 |
| 会议地点 | Virginia Beach, VA |
| 关键词 | Wetland Sanjiang Plain remote sensing GIS |
| 英文摘要 | Sanjiang Plain, located in the northeast of Heilongjiang province, is the largest concentrated area of the freshwater wetlands in China (Figure. 1). It was mainly primeval landscape before the 1950s. From the late 1950s to the early 1990s, a number of large farms were built concomitant with the loss of wetlands. Now, it is one of the main food and agricultural bases of the nation. Due to large-scale agricultural development, nearly 80% of the freshwater wetlands have been reclaimed during the past decades. [GRAPHICS] This study analysed the dynamics of the wetland and its conversion to other land uses in Sanjiang Plain from 1976 to 2005 with remote sensing imagery data and GIS spatial analysis (figure. 2). It shows that the wetland in Sanjiang Plain has been severely damaged. The wetland area decreased by 37.72% from 1976 to 1986, by 15.54% from 1986 to 1995, and by 30.97% from 1995 to 2005, which shows that the situation of wetland loss had much slowed down in 1986 to 1995, but in recent years, especially after rural Fee-Tax-Free policies adopted, which again speed up the reclamation rate of wetland. The result indicated that most wetland losing was due to reclamation, and only small part of lost wetland was converted into grassland and forest. Land use conversion is a complex process; there also some other types of land use converted to wetland during this study period, our study research showed that cropland contributed the main part for the increase in wetland area where aimless reclaimed cropland was converted into wetland during flood inundation. Both demographic and resource management policies reason were analysed for the wetland reduction. The result showed that population increasing was the main reason for wetland reduction in the past decades since 1950s, the lost wetland was mainly converted to dry farming land and paddy field, and the trend of wetland conversion to paddy field increased for the sake of its high agricultural output. Though the reclamation speed of wetland decreased during the later periods, wetland reclamation still happened, so strict and practicable protection measurement of the wetland in Sanjiang Plain should be reinforced further. [GRAPHICS] . |
| 会议主办者 | Lincoln Univ, HEMA Consulting Pty Ltd, Modelling and Simulat Soc Australia & New Zealand (MSSANZ), Univ Canterbury, SGI, Lincoln Ventures Ltd, Hoare Res Software Ltd, IMACS, IEMSS, Environm Modelling & Software, IBM |
| 会议录 | MODSIM 2007: INTERNATIONAL CONGRESS ON MODELLING AND SIMULATION - LAND, WATER AND ENVIRONMENTAL MANAGEMENT: INTEGRATED SYSTEMS FOR SUSTAINABILITY
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| 会议录出版者 | UNIV WESTERN AUSTRALIA |
| 会议录出版地 | NEDLANDS |
| 语种 | 英语 |
| 源URL | [http://159.226.123.10/handle/322005/4689]  |
| 专题 | 东北地理与农业生态研究所_合作研究组 |
| 推荐引用方式 GB/T 7714 | Song, K. S.,Liu, D. W.,Wang, Z. M.,et al. A Study on the Wetland Dynamic and Its Relation with Cropland Reclamation in Sanjiang Plain, China[C]. 见:International Congress on Modelling and Simulation (MODSIM07). Virginia Beach, VA. 2007-09-10. |
入库方式： OAI收割
来源：东北地理与农业生态研究所
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