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Wetlands of priority restoration in Northeast China based on spatial analysis.

DONG Zhang-yu1,2, LIU Dian-wei1, WANG Zong-ming1, REN Chun-ying1, TANG Xu-guang1,2, JIA Ming-ming1,2, WANG Yan3   

  1. (1Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, China; 2University of Chinese Academy of Sciences, Beijing 100049, China; 3Anhui Institute of Geological Survey, Hefei 230001, China)
  • Online:2013-01-18 Published:2013-01-18

Abstract: By using GIS/RS technology, and from the aspects of landscape structure, river and road densities, wetness index, geomorphology, and cultivated land productivity, a spatial analysis was made on the potentiality of wetland restoration in Northeast China, with the regions of priority and secondary priority restoration wetlands determined. Then, by using the coordinated development index of crop production and wetland as well as the landscape indices, the wetland restoration effect was verified. In Northeast China, the wetland area of priority restoration was 1.78×106 hm2, among which, farmland and grassland were the main types for restoration, accounting for 96.7% of the total, and mainly located in the Sanjiang Plain in the northeastern part and the Songnen Plain in the central part of Northeast China. The wetland area of secondary priority restoration was 1.03×106 hm2. After the restoration of the wetlands, the wetland area in Northeast China would be increased by 37.4%,  compared with the present wetland area, and the value of the coordinated development index of crop production and wetland would  increase from 0.539 before restoration to 0.733 after restoration. The landscape pattern would be more benefit to the performance of the ecological functions of the wetlands. This study revealed that the restoration scheme of the wetlands in Northeast China based on spatial analysis was practicable, which could provide data support for the implement of wetland restoration and the improvement of ecological environment in Northeast China.