基于高分二号卫星融合数据的城镇黑臭水体遥感监测研究

摘要

为研究通过卫星遥感手段监测城镇黑臭水体位置分布的可行性,利用高分二号卫星融合影像数据对北京市城镇水体进行水体岸线提取和水质参数反演.水质参数包括叶绿素a、悬浮物浓度、透明度和营养化指数.基于水体岸线提取结果和反演的各类水质参数的指数分布图,结合预先设定的水体黑臭程度遥感判别指标,对北京市9处水体河段水质进行综合遥感判读,辅以实地调查验证.研究结果表明,利用高分二号卫星融合影像能够很好的识别城镇区域内宽度较窄的河道岸线,并判定水面浮萍的存在,定量反演出的水体单位面积内悬浮物浓度、透明度和营养状态指数能够反映水体的黑臭程度,各河段水体黑臭程度的遥感判别结果与官方公布的结果基本一致.%To study the feasibility of monitoring the position of the urban black smelly water distribution by means of satellite remote sensing,there using of GF-2 image fusion data extract coastline and inversion water quality parameters for Beijing urban water body.Water quality parameters including chlorophyll a,suspended solids concentration,transparency and eutrophication index.Based on the coastline extraction result and inversion of all kinds of water quality parameters of the index distribution,combined with the preset water black smelly degree index of remote sensing,9 places of the river water quality in Beijing are for remote sensing interpretation,complemented by field investigation verification.The results show that GF-2 satellite image fusion can well identify the narrow width of the river coastline of cities and towns,and determines the presence of water duckweed.Quantitative inversion of water per unit area of suspended solids concentration,transparency and nutritional status index can reflect the extent of black-odor water body,and the results of each river water black-odor sensing the degree of discrimination and official results are basically the same.