蓝藻水华问题越来越成为全球关注的生态环境问题,国内相关部门也逐渐提高了对其的重视度.学者们利用遥感手段已开展了许多相关的研究,但存在蓝藻水华遥感监测空间分辨率、时间分辨率低,以及干扰因素多等问题,且国内南方地区少有研究.本文基于国产高时空分辨率的HY-1CD海洋卫星CZI影像,选择湖南大通湖作为实验区,探究南方蓝藻水华遥感监测的可行性.经实验研究和分析,在地面监测点数量足够多的情况下,通过建立卫星影像NDVI值和实测藻密度的反演模型实现遥感监测蓝藻水华的方法更加可靠,同时分析出蓝藻水华遥感监测可能存在的问题,研究成果可为后续的蓝藻水华遥感监测提供参考依据.
The issue of cyanobacteria blooms is becoming a global ecological and environmental concern,and relevant domestic departments are gradually increasing their attention.Scholars have conducted many related studies using remote sensing methods,but there are problems with the spatial and temporal resolution of cyanobacteria blooms remote sensing monitoring,as well as multiple interference factors,and there are few studies in the southern regions of China.This article is based on the domestically produced high-resolution HY-1CD ocean satellite CZI image,and selects Datonghu in Hunan province as the experimental area to explore the feasibility of remote sensing monitoring of southern cyanobacteria blooms.Through experimental research and analysis,it has been found that in the case of a sufficient number of ground monitoring points,the method of remote sensing monitoring of cyanobacteria blooms is more reliable by establishing an inversion model of satellite image NDVI values and measured algal density.At the same time,the possible problems in remote sensing monitoring of cyanobacteria blooms have been analyzed,which can provide a reference basis for subsequent remote sensing monitoring of cyanobacteria blooms.