摘要
基于我国首颗民用亚米级GF-2卫星遥感影像,以宁海县部分建成区水体为研究对象,根据基于典型遥感水质指标的识别法、基于反射率光谱指数BOI(Black and Odorous Water Index)的黑臭水体识别模型、NDBWI指数来开展疑似黑臭水体的遥感监控,对3种模型信息提取结果进行对比分析,并结合目视解译综合识别疑似黑臭水体。对监测结果的实地踏勘验证表明,宁海县建成区水环境质量总体良好,但仍有不少水域呈现较差的感官表现,存在色浊、味臭等问题。NDBWI指数和BOI指数模型均是直接利用黑臭水体的光谱特征放大差异并设定阈值进行计算,具有较好的水体类型分类效果,结合相关水体特征信息的目视解译可以获得更加精准的水体质量信息。遥感作为黑臭水体的预筛查手段,具有良好的应用效果。
This research utilizes China s first civilian sub-meter-level GF-2 satellite images,taking part of the built-up area of Ninghai County as the research object,to carry out remote monitoring of suspected black and smelly water body,and to compare the extraction results of three different models.The three models include method based on typical remote sensible water quality indicators,BOI(Black and Odorous Water Index)black and odorous water identification model based on the reflectance spectral index,and NDBWI index.The field investigation showed that the quality of the water environment in the built-up area of Ninghai County is generally good,but there are still many water areas with poor sensory problems.Both the NDBWI index and the BOI index model directly use the spectral characteristics of black and odorous water bodies,they show better classification effect of water body types by amplifying the differences and setting thresholds for calculation.Using visual interpretation of relevant water body characteristic information can obtain more accurate water quality information.As a pre-screening method for black and smelly water body investigation,satellite remote sensing with high spatial resulotion is convinced with good application effects.
作者
韩文聪
张霄宇
陈嘉星
王庭刚
尚永衡
丁亚杰
HAN Wen-cong;ZHANG Xiao-yu;CHEN Jia-xing;WANG Ting-gang;SHANG Yong-heng;DING Ya-jie(School of Earth Sciences,Zhejiang University,Hangzhou 310027,China;Ocean Academy,Zhejiang University,Zhoushan 316021,China;Engineering Center of High Resolution Earth Observation,Zhejiang University,Hangzhou 310027,China;Deqing Institute of Advanced Technology and Industry,Zhejiang University,Deqing 313200,China)
出处
《环境生态学》
2021年第1期63-71,共9页
Environmental Ecology
基金
国家自然科学基金(40706057)
国家重大专项(50-D36B02-9002-16/19)
国家重点研发计划(2017YFB1400602)
浙江省重点研发计划择优委托项目(2021C01017)
上海航天科技创新基金(SAST2019-047)资助。
关键词
模型对比
黑臭水体
高分二号
水质评价
Model comparison
black and odorous water
GF-2
water quality evaluation
作者简介
韩文聪(1997-),男,湖北襄阳人,硕士生,主要从事环境遥感方面研究。;通讯作者:张霄宇,E-mail:zhang_xiaoyu@zju.edu.cn。
