China News Service, Xi’an, August 18 (Reporter Alina) The reporter learned from the Shaanxi Provincial Department of Water Resources on the 18th that since the flood season began on May 1 this year, there have been 11 large-scale precipitation processes in the province, especially on August 3. Since the beginning of the day, affected by precipitation, 255 peaks occurred at 68 stations on 43 rivers in Shaanxi Province. Facing the over-alarm floods in the Yellow River, Weihe River and its tributaries, water conservancy departments at all levels in Shaanxi Province responded to severe floods in an orderly manner and minimized disaster losses.
The picture shows the flood discharge of Shimen Reservoir. Provided by Shaanxi Water Conservancy Information Publicity and Education Center
It is understood that the Yiluo River Lingkou Station had a super-guaranteed peak flow of 2,790 cubic meters per second (guaranteed 2000) at 6:6 on August 6, which was a once-in-a-half-30-year flood. At 20:30 on August 16, there was a super-guaranteed flood of 5,820 cubic meters per second (guaranteed 4,000) at Lueyang Station on the Jialing River, which was the largest since 1984, and a flood occurred once in 20 years. The flow of Tongguan Hydrological Station (Weinan, Shaanxi) on the middle reaches of the Yellow River rose to 5,050 cubic meters per second at 5:6 on August 18, which is the fifth flood of the Yellow River in 2020. It is forecasted that the Tongguan station on the middle reaches of the Yellow River will have a peak flow of about 5750 cubic meters per second on the 19th.
In response to the flood situation, the special class of flood and drought disaster prevention work of the Shaanxi Provincial Water Resources Department quickly discussed and judged. The supervision team will be dispatched to inspect the main streams of the Weihe River and Jialing River in a timely manner to provide local technical guidance and assistance. A video conference on dispatching was held on August 14 to connect 98 counties in 12 urban areas and put forward clear requirements for strengthening the current flood prevention work, focusing on the "red lines" of rivers, reservoirs and torrents, and strengthening the joint dispatch of rivers and reservoirs. With staff on duty 24 hours a day, follow up the rainstorm in the districts, cities, counties and reservoirs beyond the flood limit to understand the water regime and spot check on duty. Water administrative departments at all levels acted quickly to prevent storms and floods with all their strength, and scientifically dispatch water conservancy projects.
The picture shows the Weihe River patrol. Provided by Shaanxi Water Conservancy Information Publicity and Education Center
After the Shaanxi Provincial General Administration of Defense launched the fourth-level emergency response for flood control at 9:00 on August 5, the Provincial Water Resources Department simultaneously launched the fourth-level emergency response measures for flood and drought disaster prevention. According to the flood evolution and forecast of the Wei River, Han River, Jialing River and Yellow River, at 10 o'clock on August 16th, the emergency response of flood and drought disaster prevention was upgraded to Level III, and the inspection and defense of important parts of flood prevention in cities and counties was strengthened. According to statistics, a total of more than 9,500 people have been organized to inspect dikes along the Wei City and counties. The Weihe River Special Management Agency organized more than 200 people to sink to the front line, carry out inspections of river projects and dangerous sections, and provide technical support and guidance services on site.
The picture shows the Weihe River patrol. Provided by Shaanxi Water Conservancy Information Publicity and Education Center
According to the information of water and rain conditions, the Shaanxi Provincial Water Resources Department comprehensively studied the inflow of the Weihe River and its tributaries, in order to avoid the formation of flood peaks at the mouth of the Qianhe River into the Weihe River, and timely reduce the Fengjiashan over-flood limit operation status, consultation analysis and dispatch on August 18 Fengjiashan Reservoir makes good use of the "empty window period" between the two peaks, and discharges at 300-500 cubic meters per second for 8-10 hours. It closely tracks the evolution of upstream inflow and adjusts the discharge flow of Fengjiashan Reservoir in a timely manner. The Shitouhe Reservoir and Jinpen Reservoir maintain a controlled discharge operation mode according to dispatch. Through optimized dispatching of rivers, reservoirs, canals, joint control and joint regulation, the water level of the reservoir is reduced, the flood peaks of the river are avoided, and the flood damage is minimized. (Finish)