Ministry of Natural Resources: Give full play to the advantages of marine satellites to closely monitor the flood situation in the southern flood season
CCTV reporters learned from the National Satellite Ocean Application Center of the Ministry of Natural Resources that the National Satellite Ocean Application Center of the Ministry of Natural Resources gave full play to the water body design, water body characteristics and water color information identification and extraction, and the load scanning width was large. , Short coverage period, fast acquisition time, and the advantages of the Gaofen-3 satellite synthetic aperture radar not being affected by clouds and rain. On the one hand, the Haiyang-1C satellite is arranged for close monitoring, and on the other hand, the Haiyang-1D satellite, which is being tested in orbit, is arranged to join During the flood season monitoring mission, as the main user unit of the Gaofen-3 satellite, it actively coordinated with the China Land Observation Satellite Data Center to arrange synthetic aperture radar satellites to obtain remote sensing data from the disaster area. Produce satellite remote sensing live images, timely distribute the data and processed images to relevant units, and provide information services for local disaster prevention and relief, disaster assessment and post-disaster reconstruction. Let's take a look at the "track" of the marine satellite monitoring the flood situation through the marine satellite public number.
Landslide in Tunpu Township, Enshi, Hubei
On July 21, the front edge of the sand dam landslide in Mazhe Village, Tunpu Township, Enshi Tujia and Miao Autonomous Prefecture, Hubei Province, slipped into the Qingjiang River and once blocked the river course to form a barrier lake. At the request of the Hubei Satellite Technology Application Center, the orbit of the Haiyang-1 C/D satellite and the latest data were checked. In the remote sensing image of Ocean-1C satellite on July 19, Mazhe Village was covered by clouds, and the water body of the river course in Tunpu Township was in a muddy turbid state. On July 27, when the Haiyang-1C satellite orbit passed through Tunpu Township, there was no cloud. From the acquired images, it can be seen that the landslide is obviously different. The length of the landslide is about 1,200 meters and the width is about 280 meters. The upstream and downstream rivers are still yellowish.
Flood situation in Chongqing section of the upper Yangtze River
The C/D satellite images of Ocean One show that most of Chongqing was covered by clouds in June, and most of the clear sky was only seen in the images on July 3, July 24, and July 27. Compared with the image on April 28, the surface of the Yangtze River is obviously widened, and the water is yellow and turbid.
Flood situation in the upper reaches of the Yangtze River in Sichuan
On July 27, the Ocean-1C satellite image showed clear skies in most parts of Sichuan, and most of the river sections were yellow and turbid.
(CCTV reporter Zheng Tianhao and Li Hui)