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由于黄河流域持续干旱,干流来水偏枯,冬季小流量封河的可能性增大。近日,黄河防总首次启用遥感技术监测黄河凌情,密切关注冰情变化,为防凌决策提供及时准确的信息,保证黄河凌期安全。 凌情监测的主要内容是利用较低分辨率的卫星对冰凌的发生、发展直到凌汛结束整个过程动态的变化进行实时监测,每1～3天采集一次数据。在实时监测的基础上,根据防汛部门对凌情发生、发展的预报,利用较高分辨率的卫星对关键时间段进行监测。对所有获得的数据进行计算机影像处理,再以遥感影像为基础,以常规监测资料勘测数据为线索,通过人机交互方式,解译、勾画出冰冻外缘线,计算冰面积、冰覆盖度等
Due to the continuous drought in the Yellow River Basin, the dry runoff is too dry and the possibility of closure of the small flow in winter is increased. Recently, the Yellow River Defense Force for the first time enabled the remote sensing technology to monitor the situation in the Yellow River, pay close attention to changes in ice conditions, to provide timely and accurate information for the anti-Ling policy to ensure the safety of the Yellow River Ling period. The main content of the icebreak monitoring is the use of lower resolution satellite ice on the occurrence of development until the end of the flood monitoring the dynamic changes in the entire process of real-time monitoring, every 1 to 3 days to collect data. Based on the real-time monitoring, the flood control department monitors the occurrence and development of the ice storm and monitors the key time periods with higher resolution satellites. All the data were processed by computer image processing. Based on the remote sensing images and taking the conventional monitoring data as the clues, the ice rim and ice coverage were calculated and interpreted by human-computer interaction