基于GIS和遥感的大安市盐碱地动态变化分析

Analysis of Dynamic Changes of Saline Alkali Land in Da’an City Based on GIS and Remote Sensing

近年来,人们对环境的重视程度不断提高,盐碱地治理也逐渐成为环境治理的重要部分。随着科学技术进步和发展,结合新型的手段将GIS和遥感相融合治理盐碱地已经成为必然的趋势。大安市是吉林省西部草地退化的典型区域,由于自然和人文双重因素,该市有大量的沙碱化土地,且土地沙碱化不断加剧。以吉林省大安市为例,结合当地实际情况进行盐碱地变化分析,通过ArcGIS和ERDAS两个软件分析了大安市盐碱地近20年的变化、分布情况,并且根据统计分析结果和大安市的自然、社会状况给出合理化建议。

In recent years,people pay more and more attention to the environment,and saline-alkali land has gradually become an important part of environmental management.With the progress and development of science and technology,it has become an inevitable trend to combine GIS with remote sensing to control saline-alkali land.Da′an City is located in the middle and west of Songnen Plain where the low-lying saline-alkali land and sandy land are interlaced.As a typical area of grassland degradation in Western Jilin Province,Da′an City has a large number of sandy-alkaline land due to the natural environment and the destruction of people.Now the situation is getting worse and worse.According to the actual situation of Da′an City in Jilin Province,this paper analyzes the change of saline-alkali land and the distribution of saline-alkali land in Da′an City in the past 20 years by using ArcGIS and ERDAS software,and gives the reasonable construction according to the results of statistical analysis and the natural and social conditions of Da′an City.