On the afternoon of July 14, under the leadership of the Huangshan Hydrology and Water Resources Bureau of Anhui Province and with assistance from the Huizhou District Water Resources Bureau, Fuxi Township in Huizhou District completed the on-site deployment and commissioning of the “Beidou/GNSS area rainfall gauge,” officially entering the trial operation phase. This equipment can accurately predict rainfall in specific mountainous areas over the next 0 to 3 hours, providing critical decision-making support for the prevention and mitigation of short-term, intense rainfall events.

Fuxi Township is located at the southern foot of Mount Huangshan, in the headwaters of the upper Fengle River. The terrain is crisscrossed by valleys, and local microclimates are highly variable. During the summer flood season, short-duration, intense rainfall occurs frequently, posing a significant threat to the safety of people’s lives and property. Addressing the practical limitations of traditional weather radars—which are prone to line-of-sight restrictions and monitoring blind spots in mountainous environments—the system utilizes the signal delay generated when BeiDou/GNSS satellite signals traverse the troposphere to estimate precipitable water (PWV) and integrates it with the Satellite-Cloud Rainfall Model. to comprehensively analyze the synergistic changes in factors such as sudden increases in water vapor and ground temperature, humidity, and pressure. It accurately captures key signals during the early stages of severe raincloud formation, providing a critical time window for personnel evacuation and emergency response within the “golden three hours” for avoiding flash floods and geological disasters.

　　This equipment offers flexible installation and is well-suited to complex mountainous terrain. Once operational, it will work in tandem with and complement the existing rainfall observation network in Fuxi Township, thereby establishing a preliminary three-dimensional monitoring system. This will further enhance the ability to identify localized torrential rains at an early stage and provide more comprehensive data support and a basis for decision-making regarding flood prevention in downstream villages and reservoir operations during the flood season.