CBERS Images Research Articles

Remote Sensing Monitoring and Effect Evaluation on Ecological Restoration of Heidaigou Coal Mining Area

With the rapid development of society and economy, the increasing demands of coal resources not only caused the over-exploitation, but also damaged the ecological environments. So it is important to restore the mining areas, which largely means vegetation restoration. This paper takes Heidaigou mining area as the study area to get an idea of how to monitor and restore the Heidaigou mining area effectively. The data used in the research are Landsat images and CBERS images that taken from 2001 to 2010 between June and October. By analyzing the images of study area with the technologies of remote sensing and geographic information system, we get the interpreted images of typical surface features of Heidaigou mining area. The results show that the area of exposed soil of waste-dump is increasing in Heidaigou mining area, which means the intensity of exploitation is rising. Besides, the growing area of vegetation restoration shows that the intensity level of restoration is also ascending year after year in Heidaigou mining area.

Mapping large-scale distribution and changes of aquatic vegetation in Honghu Lake, China, using multitemporal satellite imagery

Honghu Lake, one of the seven largest fresh-water lakes in China, is well known for its ecological and economic importance, as well as its rapid changes in recent years. This study investigates the potential of using remote sensing to map and monitor aquatic vegetation changes in Honghu Lake on a large scale. Landsat TM/ETM+ images dated July 27, 2000, July 9, 2002, and July 17, 2008, and CBERS image dated August 12, 2005, are employed to map the aquatic vegetation distribution in the lake. A hybrid classification method, combining the power of the decision tree classifier, naive Bayes classifier, and supporting vector machine classifier is used to distinguish different wetland types. A novel polar coordinate map method is proposed to map the changes of aquatic vegetation on a large scale. The map demonstrates vegetation patch size changes and percentage changes in the whole lake directions during four periods. Validation using in situ surveys and historical ancillary data suggests that this approach could map the distribution and monitor the changes of aquatic vegetation on a large scale efficiently.

Spatial Analysis of Land Use and Land Cover Changes in Recent 30 Years in Manas River Basin

Abstract Manas River Basin, best represent the mountain-basin system in arid area, is the major part of the economic belt on the northern slope of the Tianshan Mountains. Based on the 3S technology and four periods of remote sensing image data of MSS image in 1976, TM image from USA Landsat in 1987 and 1998, and CBERS image in 2006, combining GIS and quantitative analysis of landscape ecology, this paper analyzed the spatial changes of land use and land cover in Manas River Basin among 1976-2006 by using ARCGIS and FRAGSTATS. Analysis on four periods of remote sensing image showed that there was a wide change in land use and land cover of Manas River Basin in recent 30 years. Natural grassland decreased with a rate of 91.426 km 2 /a and cultivated land increase with a rate of 121.383 km 2 /a. The rapid expansion of cultivated land converted mainly by reclamations of wasteland and natural grassland. And there were little changes of other land use types. From the relationship of transformation between various types of land use and land cover, it could be found that unused land is relatively stable land-use types, the areas of residential land and industrial land increased gradually and the cultivated land and natural grassland were the main source, a larger proportion of natural grassland mainly changed into cultivated land, forest land and residential land and industrial land, land changed into cultivated land was larger than cultivated land changed into the other land and the increased land main converted by natural grassland, and the forest land converted to other land increased gradually and the they mainly converted to salt and kaline land. However, land use and land cover change was resulted from the interaction of human activity (social and economic factors) and natural environmental changes (natural factors). So, it is necessary to consistently improve the natural environment of Manas River Valley which can provided stable basis of the theory and practice for sustainable development of Manas River Valley.

Extraction of vegetation fraction information from CBERS images based on VBSI vegetation index in Kaixian county

Based on the mixed pixel model, the vegetation fraction of Kaixian county, China, was extracted with three free CBERS images. VBSI vegetation index suitable for CBERS images constructed with FCD (forest canopy density) model principle was put forward by ITTO (International Tropical Timber Organization) was used, considering the underestimation of vegetation fraction using NDVI in low mountain-hill region influenced by soils and shadows. And vegetation fraction was divided into five categories from low to high in order to study the special variation of vegetation cover. The results show that the vegetation cover of the region is overall good, with an average of 50%. The area of vegetation fraction below 30% accounts for 11.7% of the entire studied area, mainly concentrates in central eastern Kaixian county, where is the major development zone of cities and towns; that between 30% and 60% accounts for 62%; and that higher than 60% accounts for 26%, and mostly locates in northern middle-mountain area.

Analysis of Image Fusion of TM and CBERS Based on Pixel Level

Abstract At present the research in the field of remote sensing image fusion is frequently. But the case of remote image fusion research by TM and CBERS image is less. In this paper, firstly, author apply six image fusion methods fused the TM and CBERS image in Anju district, Sichuan province. Secondly, author using the programming which writing by matlab software for image fusion quality evaluation .The results show that the qulity fused by WAV is the best one in six methods. The results of research can supply a good basic data for recognition of remote sensing.

Tai’an Land Use Analysis and Prediction Based on RS and Markov Model

Abstract Land use and cover change (LUCC) is the current research focus on global environmental change. This paper analyzes the land use type and changes in Tai’an City by interperting ETM and CBERS images in 2000 and 2007, and also build Markov model to simulating the land use tendency. In the study area land use changed rapidly with the development of economy, in which farm land mainly changed to lawn or residential land in urban and rural.

A Tentative Analysis of Remote Sensing Interpretational Key for the Neotectonics in Yangtze River Basin

During the basic geological remote sensing survey and monitoring in Yangtze River Basin,the authors adopted mainly the ETM images acquired in 2000 with the assistance of MSS images acquired in the 1970's and CBERS images acquired in 2007 to interpret the geomorphology,Quaternary geology and neo-tectonic fractures.The interpretation keys are summed up on the basis of the remote sensing interpretation practice in Yangtze River Basin.