| 引用本文: | 王得玉,冯学智,周立国,郝景燕,徐晓雄.太湖蓝藻爆发与水温的关系的MODIS遥感.湖泊科学,2008,20(2):173-178. DOI:10.18307/2008.0206 |
| WANG Deyu,FENG Xuezhi,ZHOU Liguo,HAO Jingyan,XU Xiaoxiong.Relationship between blue algal bloom and water temperature in Lake Taihu based on MODIS. J. Lake Sci.2008,20(2):173-178. DOI:10.18307/2008.0206 |
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| 摘要: |
| 利用MODIS高光谱遥感数据动态监测太湖地区蓝藻水华发展过程,并结合水温环境因子,探讨蓝藻爆发的环境条件.首先,通过简单的比值植被指数,实现蓝藻生物量的遥感估算;根据六期遥感估算结果,监测太湖蓝藻动态发展过程.然后,利用MODIS热红外波段(31和32),采用分裂窗算法,同步反演出的太湖表面水体温度,探讨蓝藻爆发的水温条件,及蓝藻生长与水体温度之间的关系.研究结果表明,在水体富营养化前提下,水体温度是影响蓝藻生长的重要环境因子;合适的水体温度(24-30℃)是蓝藻爆发的必要条件;大于30℃的高温,对蓝藻的生长有明显的抑制作用. |
| 关键词: 遥感 MODIS 蓝藻爆发 水温 太湖 |
| DOI：10.18307/2008.0206 |
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| 基金项目:国家科技支撑计划(2007BAC26B01)资助 |
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| Relationship between blue algal bloom and water temperature in Lake Taihu based on MODIS |
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WANG Deyu1, FENG Xuezhi1, ZHOU Liguo1, HAO Jingyan2, XU Xiaoxiong3
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1.Department of Geographic Information Science, Nanjing University, Nanjing 210093 P. R. China;2.Nanjing Institute of Geography and Limnology, CAS, Nanjing 210018 P. R. China;3.Geological Surveying and Mapping Institute of Zhejiang Province, Hangzhou 310030 P. R. China
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| Abstract: |
| Blue algal bloom in Lake Taihu was dynamically monitored using MODIS of hyper-spectral remotely sensed data, andcombined with water temperature, environmental condition of algal blooming was also discussed. Firstly, blue algal biomass wasestimated using simple ratio vegetation index, and progress of blue algal bloom was dynamically monitored using six sets of MODISdata. Then synchronous water temperature was retrieved from MODIS infrared bands 31 and 32 using window split model. The mainenvironmental factor of blue algal bloom- water temperature was analyzed, as well as the relationship between blue algal growing andwater temperature. The results showed that water temperature was an important environmental factor of blue algal growing;andappropriate water temperature (ranged from 24℃ to 30℃) was necessary condition of blue algal bloom;and high temperature (> 30℃)significantly inhibited the growth of blue algae. |
| Key words: Remote sensing MODIS blue algal bloom water temperature Lake Taihu |
