The historical data of the census of the Guangdong Meteorological Department, helping disaster prevention and mitigation

Comprehensively complete the application mechanism of the width and depth of the meteorological disaster -derived factors, the width and depth of the census indicators, and the establishment of the census results ... Since 2021, the Guangdong Meteorological Department has adhered to the principle of "survey, edge application, and effectiveness" Application of comprehensive risk census results. The reporter learned from the Provincial Meteorological Bureau that during this year's "Dragon Boat Water", a number of key census results were applied to disaster prevention and mitigation, providing solid support for scientific decision -making and timely warning.

The first hourly cooling quality control algorithm

How to conduct a severe rainy factor survey? How to obtain hourly precipitation statistics?

According to reports, the Guangdong Provincial Climate Center is based on the technical specifications of the comprehensive risk census of meteorological disasters and the characteristics of the "protective value" as the principle of "protective value" based on the characteristics of the regional automatic meteorological station hourly precipitation. The precipitation space is consistent with the nature of the mass control algorithm, and itself develops an algorithm script based on matrix operations. Under the "blessing" of the algorithm, the meteorological department completed the quality control of precipitation data for nearly 19 years in more than 19 years in more than 3,000 regional automatic stations in Guangdong Province in just 72 hours.

At present, the quality control algorithm is also applied to the quality control of real -time precipitation data, Zheng Ye, the person in charge of the Climate Evaluation Office of the Guangdong Climate Center, introduced that the algorithm can be used in about 60 seconds to complete the province's regional automatic station for the past 6 hours in the past 6 hours. The quality control of precipitation data has fully guaranteed the service needs of real -time meteorological business during the intensive precipitation process.

Establish a heavy precipitation process data set

Rainstorm has always been the difficulty, pain point, and blocking point of the flood prevention work in Guangdong Province. During this year's "Dragon Boat Water", the Guangdong Provincial Meteorological Bureau surveyed and analyzed the historical data and real -time data of more than 3,000 meteorological stations in the province, and established the data set and the duration of the duration of the data set and the duration of the duration of the data set of the Guangdong region. Establish an evaluation index and intensity index for regional heavy rainstorms to achieve the quantitative manifestation of the results of multiple types of rainstorm disaster census.

"In the meteorological business services facing the heavy precipitation process, the historical value of strong water reduction history query statistical system in real -time business, only two minutes will take two minutes to complete the province's various stations in the province's heavy precipitation polar value data set updates." Zheng Yan said.

From May 10th to 13th of this year, a large -scale rainfall process lasts for 4 days in Guangdong, and there are many records of extreme precipitation in many places. The comprehensive intensity index of regional heavy rainstorm process shows that the intensity of this heavy rain process has reached the first intensity of the same period in May 2003 and the sixth intensity of the predecessor season. It is, with more accurate and objective extreme precipitation information, and quantitative indicators of the heavy precipitation process, governments at all levels of Guangdong Province can make more scientific judgments in decision -making and take measures in a timely manner.

Preparation of 1499 street town extreme heavy precipitation history database

During this year's "Dragon Boat Water", the Provincial Meteorological Bureau also relying on the results and technologies of the risk risk of heavy rain disasters, combined with relevant geographical information data, analyzing intelligent frequency risks of extreme heavy precipitation such as cities, mountainous areas, and rural areas. Town Street's 1 hour, 3 hours, 6 hours, 12 hours, 24 hours, 1 day, 3, 5, and 10 days, 9 precipitation duration, the reproduction period is 5 years and the maximum reproduction period is 200 years Extremely intensive precipitation database.

The blessing of scientific and technological means, refined to town streets and different duration of extreme heavy precipitation reappearance data sets, which basically achieved early research and judgment, early identification, early warning, early transfer of early disaster risks and early disaster risks. Let people "understand at a glance, just look at it." This provides smart solutions for precision research and judgment, accurate scheduling, and precise command of the meteorological and emergency management departments.

Carry out the forecast and assessment of risk levels of flood meteorological disasters

Relying on the results of the risk of heavy rain disaster, the Guangdong Provincial Meteorological Administration has performed and upgraded the original small and medium -sized rivers floods, floods, urban and rural waterlogging, and geological disaster weather risk early warning models, which further improved the precision level of business services.

In the process of strong precipitation in mid -May, the Guangdong Provincial Meteorological Bureau used indicators such as duration, scope of rainstorm, maximum daily precipitation, and maximum process precipitation, and accounted for a timely calculation of the comprehensive impact index of heavy rain based on heavy rain evaluation models. The index shows that under general defense measures, the process caused economic losses of about 500 million to 1 billion yuan, the area of ​​crops was about 10,000 to 50,000 hectares, and the affected population was 200,000 to 600,000. This conclusion has provided an important reference for the early deployment of disaster prevention measures in the government.

In addition, the Guangdong Meteorological Department also combined with the actual rainfall and the next 72 -hour refined pattern precipitation forecast product, relying on the "Guangdong heavy rain threshold to cause a picture" to apply the risk assessment technology of heavy rainstorms, and the critical rainfall of the mountains and floods has been carried out. Forever risk level forecast and evaluation. The assessment shows that the risks of waters, waterlogging, floods, and geological disasters in northern Guangdong, such as Shaoguan, Qingyuan, Heyuan and other places in northern Guangdong and northern Guangzhou are extremely high. Afterwards, according to the inspection comparison, the assessment conclusions are basically consistent with the actual results.

Text/Guangzhou Daily · Xinhua City Reporter: Yecas Correspondent: Wang Tianwei, Ye Meng Guangzhou Daily · Xinhuacheng Editor: Ye Bijun

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