1997 · 14 citations · 0 references
Natural ResourcesEarth SciencesPhysical GeographyLandscape Change DetectionLandscape Pattern AnalysisRemote SensingDesertificationLand Cover Change DetectionLand Surface MonitoringLand UseLand Use Change DetectionRemote Sensing Change DetectionDesertification MappingDesertification MonitoringDesertification Trend AnalysisLand Change DetectionRemote Sensing AssessmentRemote Sensing Data CollectionRemote Sensing Of DesertificationSatellite Remote Sensing Data
Based on the analysis of the Landsat TM data (April 1987 and April 1993) and application of computer, we have carried out a project on the trends monitoring of desertified land in the Mu Us Sandy Land. The results indicate that the desertified land had decreased about 1 936 km 2 from 1987 to 1993 and kept a stable reversed situation in the overall statue, although there were some parts of the area had been suffered from a quick spread of desertification. Almost all of the reversed land come from those areas where the shifting dunes have been fixed by reforestation and fencing for vegetation protecting. But the reversed trend was not so clear to those desertified land which was used for cropping and grazing, so that the economic benefit of combating desertification was not so encouragement. By this project, we believe that to make full use of the remote sensing data for monitoring and assessing the desertification is one of the effective measure of quantitative research.