From water conservancy engineering to urban business cards, Dinghai will get out of the "water conservancy+" common road

Author:Science and Technology Finance Time:2022.09.22

Breaking the old ideas, creating new ideas, and creating a new future with real work. On September 21-22, the province's expedited water conservancy infrastructure construction and "water conservancy+" on-site conference were held in Dinghai District, Zhoushan City, Zhejiang Province. As a classic case of the construction of the water conservancy project in Zhejiang Province, the "Wushan Water Conservancy Project" of Dinghai District presents a new idea to the "common" of Dinghai in the province.

Creation: Find the core breakthrough, and create a "flood prevention and drainage system" in three dimensions

Dinghai District is a famous historical and cultural city of marine history. The urban area is surrounded by mountains and faces the sea on three sides, and its strategic position is very important. Surrounding Dinghai's central urban area is Dongshan, Changgang Mountain, Dagu Mountain, Haishan, Zhushan and other five mountains, and occupy 70%of the urban area. Insufficient capabilities and downstream riverside flooding ability can easily cause waterlogging in the urban area.

The urban waterlogging caused by Typhoon "Mina" in 2019 caused Dinghai people to suffer unprecedented severe damage. The pain and pain, Dinghai began to transform water treatment ideas, and made great determination to solve the "Shen Xun's illness". At the end of 2019, the "Three -Year Action Plan for Raising the Flood Control and Restaurant in Dinghai City" was formulated at the end of 2019. Innovation "upstream -Western adjustment -medium promotion -internal cycle" solution, with the systemic thinking of equal emphasis, systematically solve the upstream mountain storage of the upstream of Dinghai City, the water storage of the middle reaches of the middle reaches of the river In terms of drainage and other issues, build a foundation flood prevention and drainage system, and focus on building a sample of flood control and drainage in Jiangnan hills.

The so -called "upper block" is to build a 13.2 kilometer -built flood intercepting canal around the five mountains to achieve 70%of the hills. Part of the intercepted water is directly discharged into the sea, and some of the reservoirs enter the upstream of the urban area. Only a small part is to enter the urban river channel, which greatly reduces the flood control pressure in the urban area when the rainwater drops.

In particular, a large box of culverts with a total length of 3.8 kilometers and a maximum caliber of 5 × 4 meters in the construction of the Changgang Mountain Section can store 30,000 cubic meters of water and "save" the floods. Hua Shui "suffer" is water "profit", "waste" into "treasure", and respects nature, maintains the original balance of the ecosystem, is the first nationwide.

The concept of the "Western Tune" is proposed because of the two reservoirs in the north and Hongwei reservoirs in the upper reaches of Dinghai City. Hui Shui makes the water storage capacity of the two reservoirs stretched out, and it is easy to overflow. The Hongqiao Reservoir, which is separated from the first mountain of Chengbei Reservoir, has a library capacity of 10.15 million cubic meters, which is nearly 10 times that of the "Chengbei" reservoir. It is known as the large water tank of Zhoushan. Therefore, the "Western Tune" project was pioneered, and the flood division tunnel with a total length of 2.6 kilometers was excavated between the mountains.

After the "Western Tune" project is completed and realized the connection of the library, before the typhoon comes, the water of the Chengbei Reservoir and Hongwei Reservoir can be adjusted into the Hongqiao Reservoir in advance. While the strategy of the Hongwei Reservoir library is empty, it can be retained without the need for precious freshwater resources, and there is no need to line up directly into the sea as before.

Dinghai District and the entire Zhoushan City are extremely water -deficient cities. Before the mainland water drainage project was introduced, the water quality of the Ningbo Yao River was introduced, but its water quality was far from the local water source. According to the design, the average annual water adjustment volume of the "Western Tune" project can reach 5.3 million cubic meters, and it can supply the Dinghai District Water Plant for more than two months.

"Middle improvement" solves the problem of rainfall in urban (plain). Dinghai originally built four gates in the rowing sea in the main urban area, and some of the gates were equipped with strong pumping stations. However, due to urban development and other reasons, on the one hand In terms of insufficient flooding capacity in the urban river, this has led to the decrease in the water level at the entrance of the sea, but the upstream river channel still runs at a high water level.

Therefore, the three major rivers in the urban area were selected, moved the front pumping station to the middle and upper reaches of the river, and supported the construction of underground pressure drainage and pipes directly through the outer sea. The three newly -built pump stations have a total of 32 flows per second, and the inner diameter of the culvert is 2.2 meters, which can increase the capacity of 80%. Once opened, it can quickly reduce the water level in the urban area and become a demonstration case to solve the pain point of the coastal urban waterlogging point.

In addition, as the "internal cycle" of the "capillaries" of the underground pipe network of the urban area, Dinghai rely on the main road of the city to rely on the main drainage network of the total length of the total length of 30 kilometers and the pipeline. The transformation of the underground pipe network is expanded to promote efficient connection of rainwater collection, transportation, and discharge.

Stop storage first, divide the flooding, and the strong drainage capacity of Dinghai City is more than doubled.

The "plum blossom" typhoon landing on Zhoushan on September 14 is the strongest typhoon for landing in Zhoushan since the founding of New China. The comprehensive assessment of the storm of Dinghai is the highest -the special level, the maximum 3 -hour rainfall exceeds September, the annual precipitation of the year in September 60 %. Due to the emergency role in the newly constructed Wushan Water Conservancy Project, it was expected that there may be more than one -third of the urban area in urban area waterlogging. However Essence

Innovation: Deliven the "Water Conservancy+" article to create an ecological belt of the East China Sea Cloud Gallery

Dinghai Wushan has a unique natural environment, cultural relics and mountains and sea landscapes. In order to fully implement the 38 policies and measures and water conservancy policies of Zhejiang Province, in -depth implementation of the concept of systematic governance (water conservancy+), accelerate the construction of water conservancy infrastructure, and strive to promote the high -quality development requirements of water conservancy in the new stage. In order to break through, the Wushan Water Conservancy Project jumps out of the limitations of the old city, opens the city framework, and uses the construction of the construction of the flooding ditch during construction, and simultaneously builds 25 kilometers long water conservancy, fitness, leisure, viewing, experience and other functions. The cloud gallery ecological belt creates a national first -class urban sports and leisure green road. In October and May of 2021, the Dongshan section and Zhushan section of the East China Sea Cloud Corridor were open to the public, and the five major interfaces of "cities, mountains, coasts, bays, and islands" were organically connected. The humanistic facilities, "the victory of the mountains and the sea, the beauty of the cultivation of culture", depicts a magnificent roll of poetic mountains and sea.

Since the opening of the Dongshan section and Zhushan section of Donghai Yunlang, more than 1.5 million tourists inside and outside the city have been launched, and various types of fitness, weddings, and research have been integrated. The new Internet red punching fields of tourists inside and outside. The East China Sea Cloud Gallery, which is still victorious in Shanhai, is not only a ecological road, landscape road, fitness road, cultural road, tourism road, and common road road. road.

"Wushan around the green road, surrounding Ding Bay", Dinghai is accelerating to build a group of attractions with strong tourism adsorption power around the East China Sea Cloud Gallery, and strives to form the East Sea Cloud Gallery as the core and the surrounding blooming "Star Gongyue" In the situation of the situation, we strive to get out of an island city "Water Conservancy+" Communist Party, combining with Dingwan and ancient cities to form a beautiful urban landscape system, and make every effort to create wonderful works and important windows that show the image of Dinghai.