摘要
利用卫星遥感反演水体中的悬浮物浓度对水质监测和保护具有重要意义,在悬浮物浓度反演过程中,如何避免或最大程度降低水体中叶绿素a、有色可溶性有机物(Colored Dissolved Organic Matter,CDOM)的干扰是当前的技术难点。文章针对可持续发展科学卫星1号(SDGSAT-1)MII传感器,利用Hydrolight辐射传输模型,从理论上挖掘只与悬浮物强相关的反演因子,以此构建适用于MII影像的太湖悬浮物浓度反演模型,通过水体的实测数据和遥感数据对模型应用效果进行验证。结果表明:反演因子R′(B_5/B_3)与悬浮物浓度为强相关,同时与叶绿素a、CDOM浓度弱相关;利用R′(B_5/B_3)作为反演因子构建的幂函数模型为最优反演模型;将幂函数模型分别应用于实测数据和2022年5月4日的太湖SDGSAT-1 MII数据,两次验证试验显示反演结果和现场测量结果具有较强一致性,模型适用性较好。该研究可为SDGSAT-1卫星在湖泊水体悬浮物浓度监测、水资源评估与保护等提供一些技术参考。
The use of satellite remote sensing inversion of suspended matter concentration in water bodies is of great significance in water quality monitoring and protection.In the process of suspended matter concentration inversion,it is technically difficult at present to avoid or minimize the interference of chlorophyll-a and colored dissolved organic matter(CDOM)in the water body.Aiming at the"Sustainable Development Goals scientific satellite 1"(SDGSAT-1)MII sensor and using the Hydrolight radiative transfer model,the article theoretically excavates the inversion factor that is only strongly related to suspended matter,constructs an inversion model of Lake Taihu suspended matter concentration suitable for MII images,and applies the model to both measured and R′(B5/B3)sensing image data for verification.The results showed that:the inversion factor was strongly correlated with the suspended matter concentration,while weakly correlated with chlorophyll a and CDOM concentration;R′(B5/B3)the power function model constructed by using as the inversion factor was the optimal inversion model;the power function model was applied to the measured data and the SDGSAT-1 MII data of Lake Taihu on May 4,2022,respectively,and the two verification experiments showed that the inversion results and field measurement results had a strong consistency,and the applicability of the power function model was good.This research can provide a technical reference for the SDGSAT-1 satellite in monitoring suspended matter concentration in lake water bodies,water resources assessment,and protection,etc.
作者
王雅萍
胡雪可
李家国
姜晟
陈兴峰
赵利民
陈洪真
WANG Yaping;HU Xueke;LI Jiaguo;JIANG Sheng;CHEN Xingfeng;ZHAO Limin;CHEN Hongzhen(School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Aerospace Information Research Institute,Chinese Academy of Science,Beijing 100094,China;Jiangsu Provincial Environmental Monitoring Center,Nanjing 210019,China)
出处
《航天返回与遥感》
CSCD
北大核心
2024年第1期174-186,共13页
Spacecraft Recovery & Remote Sensing
基金
国家重点研发计划(2020YFE0200700)
河南理工大学青年骨干教师资助计划(2023XQG-12)
河南省科技攻关项目(232102210043)。
关键词
悬浮物浓度反演
可持续发展科学卫星1号
相关性
水体辐射传输模拟
遥感应用
suspended matter concentration retrieval
SDGSAT-1
correlation
water body radiative transfer simulation
remote sensing applications
