| 引用本文: | 唐晓先,沈明,段洪涛.巢湖蓝藻水华时空分布(2000-2015年).湖泊科学,2017,29(2):276-284. DOI:10.18307/2017.0203 |
| TANG Xiaoxian,SHEN Ming,DUAN Hongtao.Temporal and spatial distribution of algal blooms in Lake Chaohu, 2000-2015. J. Lake Sci.2017,29(2):276-284. DOI:10.18307/2017.0203 |
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| 摘要: |
| 巢湖是我国五大淡水湖之一，近年来水体富营养化严重，蓝藻水华频繁暴发.通过收集2000-2015年晴好天气下2478景MODIS Terra和Aqua影像，利用浮游藻类指数，提取巢湖蓝藻水华时空分布数据.结果显示，巢湖蓝藻水华覆盖面积、暴发频率以及持续时间都在增加，每年最初暴发时间提前.从分布上来看，西巢湖依然严重，中巢湖、东巢湖水华暴发面积较以往大大增加；过去16年内巢湖蓝藻水华暴发频率持续增长，其中2007年最为严重，2008-2010年暴发频率出现缓和，此后又出现增长趋势.这些研究结果有助于掌握蓝藻水华的情况，为巢湖科学治理提供了数据支持. |
| 关键词: MODIS 蓝藻水华 时空分布 巢湖 浮游藻类指数 |
| DOI：10.18307/2017.0203 |
| 分类号: |
| 基金项目:国家高技术研究发展计划“863”项目（2014AA06A509）资助. |
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| Temporal and spatial distribution of algal blooms in Lake Chaohu, 2000-2015 |
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TANG Xiaoxian1, SHEN Ming2, DUAN Hongtao2
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1.Monitoring Station of Chaohu Lake Management Authority, Chaohu 238000, P. R. China;2.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
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| Abstract: |
| Algal blooming in eutrophic lakes has become a critically important issue.As the fifth largest freshwater lake in China, Lake Chaohu has drawn increasing attentions due to the declining of water quality and the occurrence of massive algal blooms.This study applied 2478 free cloud MODIS images onboard Terra and Aqua satellites over the period of 2000-2015 to extract algal blooms with a floating algal index algorithm. The results showed that blooms coverage, frequency, and duration noticeably increased during these years, and the initial blooming occurs earlier. Particularly, algal blooms became more serious during 2000-2015. The conditions for algae blooming was getting better during 2008-2010, and the growth trend has emerged since 2011. 16-year series algal blooms data will help to understand the change in water quality of the Lake Chaohu. |
| Key words: MODIS algal blooms temporal and spatial distribution Lake Chaohu floating algae index |
