摘要
[目的]基于MODIS影像序列,对三峡截流前后洞庭湖面积变化序列进行分析。[方法]基于2000～2010年的MODIS影像序列,分析三峡大坝建立前后,洞庭湖水体面积在枯水期和丰水期的变化,同时对汛期和干旱期洞庭湖面积变化与城陵矶水文观测站的相关关系进行研究。[结果]自三峡大坝建立后,对洞庭湖在枯水期和丰水期的水体面积差有很大影响;在枯水期,洞庭湖水体面积与城陵矶水位线性关系较弱,而在丰水期,洞庭湖面积变化与城陵矶水位有较强的线性关系。[结论]该研究通过对城陵矶水位变化过程可大致估算出洞庭湖面积变化的大小,为洞庭湖水体变化的研究提供的研究基础。
[Objective] This study aimed to analyze the changes of the area of Donting Lake before and after building Three Gorges Dam based on MODIS image sequences.[Method] Based on the MODIS image sequences of 2000-2010,the change of the area of Dongting Lake in dry season and wet season before and after building Three Gorges Dam was analyzed,and the correlation between the change of the area of Dongting Lake in flood season and drought season and the record of Chenglingji Hydrological Observation Station was studied.[Result] The establishment of Three Gorges Dam had greatly influenced the area of Dongting Lake in dry season and wet season,the linear relationship between the area of Dongting Lake and the waterline of Chenglingji was weak in dry season,while it was strong in wet season.[Conclusion] This study can estimate the changes of the area of Dongting Lake through the analysis on the waterline changes in Chenglingji,providing the basis for the study on the changes of the area of Dongting Lake.
出处
《安徽农业科学》
CAS
2012年第16期9141-9145,共5页
Journal of Anhui Agricultural Sciences
基金
中国气象局气候变化专项(CCSF201205)
