Assessment of inundation changes of Poyang Lake using MODIS observations between 2000 and 2010
Assessment of inundation changes of Poyang Lake using MODIS observations between 2000 and 2010
复制标题
利用MODIS观测资料评估2000-2010年鄱阳湖淹没变化
DOI：
10.1016/j.rse.2012.01.014
复制
发表时间：
2012-06-01
影响因子：
13.5
通讯作者：
Gan, Wenxia
中科院分区：
文献类型：
--
作者：
Feng, Lian;Hu, Chuanmin;Gan, Wenxia
中国最大的淡水湖，鄱阳湖，以其重要的生态和经济价值以及湖漫区的快速变化而闻名。然而，由于技术困难，迄今缺乏关于其动态淹没区域的长期记录，更不用说它们是如何受到气候变化和/或人类活动的影响的。利用2000年至2010年收集的中分辨率成像光谱仪(MODIS)中分辨率(250-m)数据和客观的水/陆划定方法，记录和研究了湖泊淹没的短期和长期特征。月平均淹没区和年平均淹没区存在明显的季节性和年际变化。淹没面积在2009年10月的714.1公里(2)到2010年8月的3162.9公里(2)之间，任何一年的淹没面积都可能变化2.3%-3.2%。在11年期间，最大可能淹没面积是最小可能淹没面积的14倍，显示出极端的变异性。从2000年到2010年，年平均淹没面积和最小淹没面积都呈现出显著的下降趋势(分别为-30.2公里(2)年和-23.9公里(2)年，p
China's largest freshwater lake, Poyang Lake, is well known for its ecological and economic importance as well as its rapid changes in lake inundation areas. However, due to technical difficulties, to date long-term records of its dynamic inundation areas are lacking, not to mention how they are affected by climate change and/or human activities. Using Moderate Resolution Imaging Spectroradiometer (MODIS) medium-resolution (250-m) data collected between 2000 and 2010 and an objective water/land delineation method, we documented and studied the short- and long-term characteristics of lake inundation. Significant seasonality and inter-annual variability were found in the monthly and annual mean inundation areas. The inundation area ranged between 714.1 km(2) in October 2009 and 3162.9 km(2) in August 2010, and the inundation area during any particular year could change by a factor of 2.3-3.2. During the 11-year period, the maximum possible inundation area was 14 times the minimum possible inundation area, indicating extreme variability. Both the annual mean and minimum inundation areas showed statistically significant declining trends from 2000 to 2010 (-30.2 km(2) yr(-1) and-23.9 km(2) yr(-1), p