摘要
遥感技术已广泛应用于叶绿素、营养状态等多种水环境参数监测,能够及时捕捉水库水环境变化动态。在推进美丽河湖建设、加强重点水库保护治理的背景下,实现水库营养状态的同步监测尤为关键。本研究基于陆地卫星影像,系统分析鹤地水库各水质参数反演的最优波段组合,反演2020—2023年透明度(SD)、总氮(TN)、总磷(TP)、化学需氧量(COD)及叶绿素a(Chla)等水质参数,并计算水质综合营养状态,深入剖析其时空变化特征。研究结果显示:2020—2021年,鹤地水库水质综合指数上升,水质由良好退化至轻度污染;2022—2023年,综合指数下降,水质有所改善。从空间分布来看,鹤地水库综合营养状态指数呈现库区低、库周高的特点,入库流量与人类活动对其影响显著。未来研究可通过融合多源数据,实现长时间序列、大范围水质参数的自动化反演,进一步提升水质营养状态遥感监测的应用效能。
Remote sensing technology has been widely applied to the monitoring of various water environment parameters such as chlorophyll and trophic states,enabling the timely detection of dynamic changes in reservoir water quality.In the context of promoting the construction of beautiful rivers and lakes and enhancing the protection and management of key reservoirs,the synchronized monitoring of trophic status in reservoirs has become particularly crucial.This study utilizes Landsat satellite imagery to systematically analyze the optimal band combinations for retrieving water quality parameters of the Hedi Reservoir.It performs inversion of parameters including Secchi depth(SD),total nitrogen(TN),total phosphorus(TP),chemical oxygen demand(COD),and chlorophyll-a(Chla)from 2020 to 2023,and calculates the comprehensive trophic level index(TLI)to reveal temporal and spatial variation characteristics.The results show that from 2020 to 2021,the comprehensive water quality index increased,indicating a shift from good quality to slight pollution.From 2022 to 2023,the index declined,indicating improved water quality.Spatially,the trophic state index of the reservoir exhibits a pattern of lower values in the central reservoir area and higher values near the periphery,significantly influenced by inflow volumes and human activities.Future research can enhance remote sensing applications for water quality monitoring by integrating multi-source data to enable automated inversion of water quality parameters over extended periods and large spatial scales.
作者
梁雯珊
张宛宛
LIANG Wenshan;ZHANG Wanwan(Scientific Institute of Pearl River Water Resources Protection,Guangzhou 510630,China)
出处
《水利建设与管理》
2025年第8期51-59,共9页
Water Conservancy Construction and Management
关键词
鹤地水库
水质反演
营养状态评价
遥感
Hedi Reservoir
water quality inversion
trophic state assessment
remote sensing
作者简介
梁雯珊(1995-),女,硕士,工程师,主要从事水资源管理与保护等工作。;通信作者:张宛宛(1991-),女,硕士,工程师,主要从事水资源管理与保护等工作。
