基于长时序多光谱遥感技术的白洋淀水质演变监测分析

Monitoring and Analysis of Water Quality Evolution in Baiyang Lake Based on Long Time Series Multispectral Remote Sensing Technology

针对白洋淀水污染严重、水质监测手段不足等问题,充分利用遥感技术的大范围、长时序监测优势,基于哨兵2号多光谱遥感影像,计算2018年—2020年间白洋淀水域的植被指数,结合同时间段的叶绿素a地面监测数据,建立植被指数与白洋淀水质叶绿素a之间的关系模型,实现基于哨兵2号遥感影像的白洋淀叶绿素a监测。借助2018—2022年的哨兵2号长时序遥感数据,对白洋淀叶绿素a进行反演,进一步分析白洋淀2018年以来水质演变过程及原因。

Aiming at the problems of serious water pollution and insufficient water quality monitoring means in Baiyang Lake,make full use of the advantages of remote sensing technology in large-scale and long time series monitoring.Based on Sentinel 2 multi-spectral remote sensing image,the vegetation index of Baiyang Lake water area from 2018 to 2020 is calculated,and the ground monitoring data of leaf chlorophyll a in the contract period is concluded,and the relationship model between the vegetation index and the water quality leaf chlorophyll a in Baiyang Lake is established,realize the monitoring of leaf chlorophyll a in Baiyang Lake based on Sentinel 2 remote sensing image.With the help of the long time series remote sensing data of Sentinel 2 from 2018 to 2022,the leaf chlorophyll a of Baiyang Lake is retrieved to further analyze the water quality evolution process and reasons of Baiyang Lake since 2018.