Road accumulated snow calamity monitoring and early warning method based on multisource remote sensing data

Abstract

The invention relates to a road accumulated snow calamity monitoring and early warning method based on multisource remote sensing data. According to the method, first of all, a cloud-free accumulated snow area product is obtained by performing cloud removal processing on a MODIS accumulated snow area product by use of a cloud removal algorithm; an accumulated snow depth product is obtained through a snow depth reversing algorithm by use of a passive microwave SSM / I and SSMI / I brightness temperature observation, for calculating a whole-road average annual accumulated snow day number of many years and a multi-year average accumulated snow thickness and determining a key accumulated snow road mileage of a whole road; secondly, by use of Landsat and high-definition satellite remote sensing image data, through a normalization accumulated snow exponent and a high-definition accumulated snow exponent threshold method extraction method, accumulated snow is identified, and accumulated snow spatial distribution of each mileage of a key road is extracted; and finally, through a surface temperature, ASTER GDEM, a gradient, an aspect and a meteorological condition, roads prone to icing and roads prone to avalanches and blowing snow are determined. According to the invention, monitoring of road accumulated snow distribution and the roads prone to icing, avalanches and blowing snow are realized by use of the multisource remote sensing data, and monitoring and early warning of road accumulated calamities are accurately realized.

Description

technical field [0001] The invention relates to the technical field of remote sensing, in particular to a method for monitoring and early warning of road snow disasters by using multi-source remote sensing data. Background technique [0002] China has a vast territory and complex topography. The snow cover is widely distributed and is easily affected by the local climate and topography. A large amount of snowfall over a long period of time causes a wide range of snow disasters, which have a great impact on all aspects of the national economy. Especially in the northeast, north, northwest and southwest regions of China, the winter is long, the wind is strong, and the snowfall is large. Snow disasters such as avalanche, wind blowing snow, and road icing along the highway frequently occur, causing road blockage and damage, and endangering the lives of local people. , normal life and economic and social development have caused serious impacts, and have become a long-term probl...

AI Technical Summary

Problems solved by technology

Due to the lack of professional meteorological data in many mountainous areas, it is difficult to make accurate early warning forecasts

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