摘要
基于Landsat与HJ1A/1B多源遥感数据、实测水质数据、光谱数据,利用悬浮颗粒物(SPM)、叶绿素a(Chl-a)质量浓度与水体光学特性之间的关系构建反演模型,模拟SPM、Chl-a质量浓度的时空演变规律及其影响因素。结果表明:1985—2015年,随着南水北调工程的实施,东平湖春季SPM与Chl-a质量浓度变化呈现3个阶段显著变化的特点,且SPM与Chl-a质量浓度总体上呈现负相关趋势,SPM质量浓度较高区域的负相关趋势尤为显著,相关系数最高达-0.86;调水过程中,径流导致的底质再悬浮使得SPM质量浓度增高,而调水注入的稀释作用使得Chl-a质量浓度降低;第一、二阶段SPM与Chl-a质量浓度分布规律主要受大汶河流域污染、围网养殖等综合因素影响,第三阶段主要受水体流速、流向等调水期水动力因素影响。
Based on Landsat and HJ1A/1B remote sensing data,measured water quality data,and spectral data,using the relationship between suspended particulate materials(SPM),chlorophyll-a(Chl-a)concentrations and optical properties of water,an inversion model was established.The spatiotemporal evolution of SPM and Chl-a mass concentrations and their influencing factors were simulated.The results showed that with the implementation of the south to North Water Diversion Project,the changes of SPM and Chl-a mass concentrations in Dongping Lake in spring showed three significant stages from 1985 to 2015.The correlation between SPM and Chl-a mass concentrations was negative in general,especially in the high SPM concentration area,with the highest correlation coefficient of-0.86.In the process of water diversion,the sediment resuspension caused by runoff increases the mass concentration of SPM,while the dilution effect of water diversion injection decreases the mass concentration of Chl-a.The distribution of SPM and Chl-a mass concentrations in the first and second stages was mainly affected by pollution and purse seine culture in the Dawen River Basin.The third stage was mainly affected by the flow velocity,flow direction and other hydrodynamic factors.
作者
何振芳
郭庆春
邓焕广
刘加珍
梁天全
于泉洲
姚昕
肖燕
段艺芳
HE Zhenfang;GUO Qingchun;DENG Huanguang;LIU Jiazhen;LIANG Tianquan;YU Quanzhou;YAO Xin;XIAO Yan;DUAN Yifang(School of Environment and Planning,Liaocheng University,Liaocheng 252000,China;State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)
出处
《水资源保护》
CAS
CSCD
北大核心
2021年第3期87-95,144,共10页
Water Resources Protection
基金
国家科技基础条件平台(Y719H71006)
山东省社科规划研究项目(18CKPJ34)
国家自然科学基金(41977322)。
关键词
多源遥感
HJ1A/1B
悬浮颗粒物
叶绿素A
东平湖
南水北调工程
multi-source remote sensing
HJ1A/1B
suspended particulate matter
chlorophyll-a
Dongping Lake
South-to-North Water Transfer Project
