By the methods of GIS spatial analysis and landscape pattern analysis,the process of transformation from wetland to farmland in the study area in the past fifty years was analyzed.

Mechanism research of the railway foundation reinforcement of the vibro-replacement stone column in the swamping wetland;

Through test data from Anduo Section of Qinghai-Tibet railway,this paper discusses and analyzes the characteristics of temperature and the permafrost upper limit change of the subgrade that has adopted geogrid measures and piece of rocks for the foundation treatment on the permafrost swamp.

Analysis of wetland landscape pattern change and its driving mechanism in Jilin western part;

Effect of paddy field drainage on Carex lasiocarpa mire wetland;

N 2O concentration and its flux were measured in Sanjiang Plain wetland,from August to September in 2001,by using in situ closed chamber technique.