Wetland dynamics in west Songnen Plain, China since 1950s

Fang Huang; Ping Wang; Yangzhen Zhang

doi:10.1117/12.733216

22 October 2007 Wetland dynamics in west Songnen Plain, China since 1950s

Fang Huang, Ping Wang, Yangzhen Zhang

Proceedings Volume 6679, Remote Sensing and Modeling of Ecosystems for Sustainability IV; 66790E (2007) https://doi.org/10.1117/12.733216
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

In the past several decades, land cover in the region underwent dramatic changes and the progressive loss and conversion of wetlands has become a key conservation issue. Based on the theory and methods of landscape and GIS, topographic map in 1954, Landsat MSS in 1976, Landsat TM/ETM imagery in 2000 were used to detect the wetland pattern and its change in middle and lower Wuyu'er River, west Songnen Plain since the mid 1950s. The results showed that area of marsh decreased from 56.04×10⁴ ha to 32.04×10⁴ ha, while the area of cropland increase 24.94×104 ha during 1954- 2000. Calculated from change dynamic model, the annual loss rate of marsh was -1.48% (from 1954 to 1976) and - 0.76% (from 1976 to 2000) respectively. Due to shortage of water supply, marsh land were turned into dry grassland and degraded to saline-alkaline land. The number and size of marsh patch decreased significantly which indicated that the wetland landscape became more fragmental. The grassland decreased by 40.26×104 ha dramatically due to having been opened up to cropland and degraded into hardly-used land. The study indicates that the loss and degradation of wetlands was closely related to warmer and drier regional climate during the past 50 years. Intensive human activities including irrational reclamation, overgrazing, and ditches drainage and road construction accelerated the process.

Citation Download Citation

Fang Huang, Ping Wang, and Yangzhen Zhang "Wetland dynamics in west Songnen Plain, China since 1950s", Proc. SPIE 6679, Remote Sensing and Modeling of Ecosystems for Sustainability IV, 66790E (22 October 2007); https://doi.org/10.1117/12.733216

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available