Base On 3S Technology Study On Dynamic Of Soil Salinization In Dalinor Nature Reserve

The destructive effect for eco-environment systems of Soil salinization is attracting more and more attention. Using 3S technology to show realistically earth's surface's information and analyse realistically earth's surface's data and forecast information. For Dalinor Nature Reserve's special geographical environment, the paper based on 3S technology use during 3 years from 2005 to 2007 Dalinor Nature Reserve landsat's image to classify and get 3 years Dalinor Nature Reserve soil salinization's classification maps and vecter data and then get soil salinization cover area . Monitoring soil salinization cover area in study area and statistics of salinification area to analyse soil salinization cover area's change in space dimension and time dimension . The study results show : From 2005 to 2007,in Dalinor Nature Reserve,the degree of salinization severely aggravated. The total area of soil salinization is slightly decreased.Particularly, the ratio of soil salinization area decreased 2.02% in 2006 .But in Dalinor Nature Reserve,the area of saline soil increased 418.61hm2,the maximum increase rate was 183.16%,the area of strongly salinized soil also extend,the maximum increase rate was 10.13%,the total area of moderately salinized soil and slightly salinized soil was decrease. The major areas of salinization in the study region is along the lakeshore and region wetland verge and the areas of human frequent activity.The water area decreased 1678hm2,maximum decrease rate was 4.65%,the main lake area decreased 1042.75hm2.The proportion of the main lakes area increased in the water area.The increase rate was rising from 96.84% in 2005 to 99.46% in 2007. It show that the minilakes decreased in Dalinor Nature Reserve.