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1974~2007 年若尔盖县湿地变化研究
Alternative TitleChange of Wetlands in Zoigê County from 1974 to 2007
蒋锦刚; 李爱农; 边金虎; 于之锋; 雷光斌
Corresponding Author李爱农
Source Publication湿地科学
Other Abstract 选取1974~2007年期间的5期多源遥感影像数据作为数据源,在解决多源遥感影像(MSS、TM、ETM+和CBERS影像)和多时相(1月、6~9月)影像数据的遥感分类问题上,以模糊物元理论来解释多数据源和多时相数据之间的关系,设计关联函数概率转化的多源遥感数据分类物元模型,利用该模型得到了若尔盖县湿地区1974~2007年期间的地物类型分布,并进行了变化检测和概率修正算法处理,揭示了1974~2007年若尔盖县湿地变化特征。2007年,若尔盖县各类型湿地的面积占湿地总面积的比例分别为河流和湖泊1.37%、泥炭沼泽4.23%、沼泽化草甸9.91%和湿草甸6.04%。1974~2007年期间,若尔盖县的河流和湖泊、泥炭沼泽、沼泽化草甸和湿草甸的面积在减少,以旱生植物为主的中、低覆盖度草地、居民点、建筑用地和沙地面积在增加。泥炭沼泽主要向沼泽化草甸、湿草甸演替。人为因素则是在较短时间尺度上影响湿地变化的主要驱动力。不确定性问题仍是遥感分类与变化检测存在的主要问题。 
; The Zoigê wetlands is located in eastern edge of Tibet Plateau,which is an important headwater conservation district in the upper reaches of the Yellow River,crossing the conjunction area of Sichuan and Gansu provinces.In recent years,the ecological environment deterioration is increasing,mainly marked by swamp drought,grassland desertification and rat troubles,due to global climate change,long-term over-grazing,canalizing and water discharging and human activities.In this paper,remote sensing images from 4 sensors(MSS,TM,ETM+,and CBERS),and ASTER-GDEM and MODIS-NDVI data were used as data sources to study distribution of the surface objects and change characteristics of Zoigê wetlands during 5 periods from 1974 to 2007.In order to solve the problem on classification of multi-source and multi-temporal remote sensed data,the relationship between the multi-sources and multi-temporal data was explains by the fuzzy matter-element theory,and a classification matter-element model based on multi-sources data by correlation function was developed in the paper.Using this method,the surface types of Zoigê wetlands were extracted in 1974,1986,1994,2000 and 2007,and the ratio of area of various types of wetlands in total area of Zoigê county in the five periods were rivers and lakes 1.37%,peat swamp 4.23%,swampy meadow 9.91%,and wet meadow 6.04% in 2007.After the designed change detection and probability revisal,the results showed that the areas of rivers and lakes,peat swamp,swampy meadow,and wet meadow were gradually shrinking,while the areas of grasslands with low and middle degree of coverage,residential area,building sites and sandy lands were gradually enlarging in Zoigê wetlands during 1974-2007.Peat swamp mainly experienced the succession process towards to swampy meadow and wet meadow.Natural factors and human activities were the main influence factors resulting in the constantly degradation of Zoigê wetlands.Natural factors controlled the change of the wetlands under the environment background,while human activities were the mainly driving forces resulting in wetland change in the short time scale.The uncertainty is still the main problem in the process of remote sensing image classification and change detection.
Keyword泥炭沼泽 若尔盖县 多源遥感数据 分类 物元模型 变化检测
Indexed By其他
Funding Organization中国科学院“百人计划”项目;国家自然科学基金项目(41271433);中国科学院知识创新重要方向性项目(KZCX2-YW-QN313);碳专项项目(XDA05050105)
Document Type期刊论文
Recommended Citation
GB/T 7714
蒋锦刚,李爱农,边金虎,等. 1974~2007 年若尔盖县湿地变化研究[J]. 湿地科学,2012,10(3):318-326.
APA 蒋锦刚,李爱农,边金虎,于之锋,&雷光斌.(2012).1974~2007 年若尔盖县湿地变化研究.湿地科学,10(3),318-326.
MLA 蒋锦刚,et al."1974~2007 年若尔盖县湿地变化研究".湿地科学 10.3(2012):318-326.
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