基于Sentinel-2A影像的苏子河地表水水质新冠疫情前后对比分析  

Comparative analysis of surface water quality of Suzi River before and after COVID-19 based on Sentinel-2A image

作　　者：张梦娇 陈圣波[1,2] 张斌 张玉峰 韩程 ZHANG Mengjiao;CHEN Shengbo;ZHANG Bin;ZHANG Yufeng;HAN Cheng(College of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China;Jilin Institute of GF Remote Sensing Application,Changchun 130012,China)

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]吉林高分遥感应用研究院有限公司,长春130012

出　　处：《世界地质》2023年第1期184-191,共8页World Geology

基　　金：国家重点研发计划(2020YFA0714103)。

摘　　要：为研究疫情前后苏子河地表水水质时空变化并分析其变化原因,笔者基于Sentinel-2A影像建立苏子河水质参数反演模型,对2019—2021年4月苏子河水体的溶解氧(DO)、高锰酸盐指数(COD_(Mn))、总氮(TN)和溶解性总固体总量(TDS)4种水质参数进行遥感监测。结果表明,2019—2021年苏子河DO、COD_(Mn)和TDS浓度分别下降5%、18%、3%,其中COD_(Mn)降幅最大,TN浓度先升后降,整体表现为上升0.06 mg/L(6%)。与未发生疫情相比,苏子河水质整体处于改善阶段,改善效果2020年优于2021年,上游(a河段)和下游(d河段)优于中游地区(b、c河段),水质改善的主要原因是人类活动衰减引起工业和养殖业污水减排,其空间差异与当地水资源和人口分布不均有关,TN浓度的不降反升反映出疫情初期消毒剂大量粗放使用对水质改善存在一定的负作用。In order to study the spatiotemporal variation of surface water quality of Suzi River before and after COVID-19,and analyze the reasons for the changes,the authors established an inversion model of water quality parameters of Suzi River based on Sentinel-2A images.Factors as DO,COD_(Mn),TN and TDS of water quality parameters in Suzi River from 2019 to April 2021 were studied by remote sensing monitoring.The results show that from 2019 to 2021,the concentrations of DO,COD_(Mn) and TDS in Suzi River decreased by 5%,18%and 3%,respectively,with COD_(Mn) decreasing the most,and TN increasing first and then decreasing,finally increasing by 0.06 mg/L(6%).Compared with non-epidemic scenario,the overall water quality of Suzi River is in the improvement stage,and the improvement effect in 2020 will be better than that in 2021,and the upstream(a reach)and downstream(d reach)are better than those in the middle reaches(b and c reaches).The main reason for the improvement of water quality is the results of industrial and aquaculture wastewater emission reduction caused by the attenuation of human activities,and the spatial difference is related to the uneven distribution of local water resources and population.The increase of TN concentration instead of decrease reflects that the extensive use of disinfectants in the early stage of the epidemic had a certain negative effect on the improvement of water quality.

关 键 词：苏子河 新冠疫情 水体质量 水质遥感 

分 类 号：TP72[自动化与计算机技术—检测技术与自动化装置] X832[自动化与计算机技术—控制科学与工程]