Analysis of Status of Precipitation Station Network in Sichuan Province
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Abstract:
The layout quality of the meteorological station network directly affects the efficiency of observation data use. The existing surface precipitation station network in Sichuan Province is analyzed from the perspectives of the horizontal station spacing, vertical layer distribution, slope, river basin, risk zoning, station control range, and grid coverage, aiming to provide a scientific basis for the subsequent increase or decrease of stations and the optimisation of station network layout. The results show that: (1) The average horizontal station spacing of Sichuan precipitation stations is 9.04 km, which fully meets the requirements for climate monitoring by the World Meteorological Organisation OSCAR, and the “breakthrough” needs of global numerical weather forecasting, but there still exists a certain gap from the ideal “target”. (2) Over 80% of precipitation stations in Sichuan Province are located in low and medium-altitude areas, and 92.38% of precipitation stations are located in flat slopes, relatively flat slopes, gentle slopes, and relatively gentle slopes. (3) The area of the higher and highest-risk areas in Sichuan Province accounts for less than 40%, and the number of stations accounts for more than 50%. The density of the station network gradually increases with the risk area from low to high. (4) Stations with a control area of <100 km2 are primarily distributed in the Sichuan Basin. Stations in the Western Sichuan Plateau generally have a control area of more than 100 km2, and some stations have a control area of more than 1000 km2. (5) The grid coverage at different resolutions is highest in the Sichuan Basin, followed by the Panzhihua Xichang area, and the Western Sichuan Plateau is relatively low.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.