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介绍了FY-3A/MERSI数据的基本情况,以及FY-3A/MERSI在晴空和薄云下水体的有效识别方法—(Rc2+Rg2)/(Rc1+Rg1)方案,并将之应用于2013年松花江(黑龙江省境内)和黑龙江流域的洪水水情监测。选取洪水前期、洪水高峰期、洪水下降期和洪水结束期4个时相的FY-3A/MERSI数据监测洪水水情变化,并进行水体识别及对比分析;同时,结合GIS技术按县市提取并统计洪水面积。结果表明,基于FY-3A/MERSI数据和GIS技术,能及时、准确地监测洪水水情变化。相关研究成果已在ARCGIS中建成模型,可为洪水监测业务服务。
The basic situation of FY-3A / MERSI data and the effective identification method of FY-3A / MERSI in clear sky and thin cloud under water - (Rc2 + Rg2) / (Rc1 + Rg1) are introduced and applied to 2013 Songhua River (Heilongjiang Province) and Heilongjiang River Basin flood conditions monitoring. The FY-3A / MERSI data of four phases of pre-flood period, flood peak period, flood descent period and flood ending period were used to monitor flood and water regime changes, and water body identification and comparative analysis were carried out. At the same time, Statistics flood area. The results show that the change of flood and water regime can be timely and accurately monitored based on FY-3A / MERSI data and GIS technology. Relevant research results have been built in ARCGIS model, flood monitoring services for the business.