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引用本文:张娇,陈莉琼,陈晓玲.基于FAI方法的洱海蓝藻水华遥感监测.湖泊科学,2016,28(4):718-725. DOI:10.18307/2016.0404
ZHANG Jiao,CHEN Liqiong,CHEN Xiaoling.Monitoring the cyanobacterial blooms based on remote sensing in Lake Erhai by FAI. J. Lake Sci.2016,28(4):718-725. DOI:10.18307/2016.0404
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基于FAI方法的洱海蓝藻水华遥感监测
张娇, 陈莉琼, 陈晓玲
武汉大学测绘遥感信息工程国家重点实验室, 武汉 430079
摘要:
利用19992014年Landsat卫星遥感影像数据,采用浮游藻类指数(FAI)方法识别、提取洱海蓝藻水华信息,进而获取蓝藻水华时空分布数据,为进一步分析洱海蓝藻水华发生规律及监测预警提供参考. 结果表明:19992014年洱海夏、秋季多次发生蓝藻水华,以小型水华为主(水华面积在10 km2以内),大型水华现象主要发生在2003、2006、2013年,其中2006年水华面积最大,达到42 km2.除近岸湖湾区域容易产生蓝藻堆积外,洱海蓝藻大型水华主要发生在洱海北部和中部区域,南部发生频次较少.近岸区域蓝藻堆积从春季开始,中心水域水华发生在夏末和秋季(811月),其中大型水华集中发生在10月左右.
关键词:  洱海  蓝藻水华  浮游藻类指数  Landsat  时空分布
DOI:10.18307/2016.0404
分类号:
基金项目:国家水体污染控制与治理科技重大专项(2013ZX07105-005)、国家自然科学基金项目(41301366)和2015测绘地理信息公益性行业科研专项(201512026)联合资助.
Monitoring the cyanobacterial blooms based on remote sensing in Lake Erhai by FAI
ZHANG Jiao, CHEN Liqiong, CHEN Xiaoling
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, P.R.China
Abstract:
Based on Landsat satellite remote sensing imageries, cyanobacterial blooms in Lake Erhai during 1999 to 2014 were extracted by floating algae index (FAI) algorithm. According to the results, spatio-temporal distribution of cyanobacterial blooms was analyzed for the exploration of general regularity, long-term monitoring and early-warning. The results indicated that (1) cyanobacterial blooms mainly broke out in summer and autumn between 1999 and 2014, and almost at small scales. Large-scale blooms only occurred in the year of 2003, 2006 and 2013, with the maximum area of 42 km2 in 2006. (2) Blooms were usually observed in the nearshore area and bays, but the northern and central regions were the area where large-scale cyanobacterial blooms broke out most frequently, while blooms in southern region broke out less. (3)Blooms in nearshore area broke out in spring, while in the central region generally broke out in later summer and autumn (from August to November). Moreover, large-scale and long-time lasted algal blooms were usually found around October.
Key words:  Lake Erhai  cyanobacterial blooms  floating algae index(FAI)  Landsat  spatio-temporal distribution
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