【摘要】 以武汉市东湖和沙湖为例,以多时相TM影像为数据源,利用ERDAS软件提取东湖和沙湖1991年、2001年和2006年的水域面积信息从时空两方面对湖泊水域面积的演化特征进行了系统分析。结果表明,1991—2006年湖泊水域面积出现急剧下降,减少了1040.43hm2。分析认为,随着城市经济的发展,对土地的需求会更为迫切,城市湖泊的保护也将面临巨大挑战。遥感技术具有宏观性、动态性与实时性的优势,能够快速、准确地获取大范围地区水域面积变化信息,定量地分析城市湖泊演化规律,为城市湖泊的合理开发、利用和保护提供重要依据。更多还原

【Abstract】 In this paper,the multi-temporal TM images as date source were used for extracting the water area information of Donghu and Shahu in the year of 1991,2001 and 2006 by ERDAS software.It analyzed systematicly the area evolution characteristics of two lakes from both time and space.The results showed that the areas of two lakes decreased by 1040.43hm2 from 1991 to 2006.The analysis indicated that along with urban economic development,the demand for land would be more urgent,the urban lakes protection would also face huge challenge.The RS technique which had the macroscopic,dynamic and timely superiority,was able to quickly and accurately obtained the large-scale changes of water area information,and quantitativly analyzed the law of urban lake evolution,provided the important basis for the urban lakes reasonable development,use and protection.更多还原