基于World View-2影像的西溪湿地悬浮泥沙遥感监测  

Remote Sensing Monitoring of Suspended Sediment in Xixi Wetland Based on World View-2 Satellite Image

作　　者：华康 肖晗 于之锋[1,4] 黄祺宇 周斌 方美红[1,4] 袁小红 HUA Kang;XIAO Han;YU Zhifeng;HUANG Qiyu;ZHOU Bin;FANG Meihong;YUAN Xiaohong(Institute of Remote Sensing and Earth Sciences,Hangzhou Normal University,Hangzhou 311121,China;Huzhou Technician School,Huzhou 313200,China;School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China;Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change,Hangzhou 311121,China)

机构地区：[1]杭州师范大学遥感与地球科学研究院,浙江杭州311121 [2]湖州市技师学院,浙江湖州313200 [3]武汉大学遥感信息工程学院,湖北武汉430079 [4]浙江省城市湿地与区域变化研究重点实验室,浙江杭州311121

出　　处：《杭州师范大学学报（自然科学版）》2023年第1期28-35,共8页Journal of Hangzhou Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(41801251);杭州市科技计划引导项目(20201231Y071)。

摘　　要：西溪湿地作为城市次生湿地,其生态和旅游功能为人们所重视,因此监测其水质安全尤为重要.水体中悬浮泥沙浓度是评定水质的相关参数之一,利用环境遥感技术可对水体的悬浮泥沙浓度信息进行监测.以西溪湿地2个时相的World View-2影像为主要数据源,通过水体光谱测量及水样采集,建立悬浮泥沙定量反演模型,并利用实测数据对反演模型精度进行验证评估.研究结果表明:1)采用第三、第五波段遥感反射率比值模型可削弱大气影响,突出悬浮泥沙信息,模型平均相对误差为19.98%;2)采用FLAASH大气校正方法,影像所有波段平均相对误差为17.58%;3)2011年、2013年选用的单景影像反演结果显示西溪湿地悬浮泥沙平均浓度分别为7.48mg/L、9.35mg/L,且湿地各区域悬浮泥沙浓度差异明显;4)采用合适的大气校正和悬浮泥沙反演模型,World View-2影像可较好地应用于西溪湿地悬浮泥沙浓度的遥感监测.As a secondary wetland for cities,the ecological and tourism functions of Xixi wetland has attracted attentions from the society.Hence the monitoring of its water quality is an essential task.Suspended sediment concentration is one of the important parameters to assess the water quality,and remote sensing can be a convenient tool to obtain this parameter.Using World View-2imagery of Xixi wetland as the main data source,aquantitative retrieving model for suspended sediment concentration was established through water spectrum measurement and analysis of water samples.The accuracy of the built model was validated by the observed data.The research indicated that:1)Using the third and fifth band remote sensing reflectance ratio model could weaken the atmospheric influence and highlight the suspended sediment information,and the average relative error of the model was 19.98%;2)The average relative error of all bands was 17.58% using the FLAASH atmospheric correction method;3)The single-view image inversion results selected in 2011 and 2013 showed that the average concentration of suspended sediment in Xixi wetland was 7.48 mg/L and 9.35 mg/L,respectively,and the concentration of suspended sediment in different Xixi wetland area varied significantly;4)World View-2images could be well applied to monitor suspended sediment concentration in Xixi wetland when appropriate atmospheric correction and suspended sediment retrieval model were used.

关 键 词：World View-2 西溪湿地 悬浮泥沙 遥感监测 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]