Qinglong river, known as the moat in ancient times, was built in Jiajing period of Ming Dynasty. Qinglong river originates from the Tianhe Bridge in Suhe River, leads from Tongda Road in Suhe River, runs through Linyi City from northwest to southeast, and flows into Xiaobudong Irrigation Canal in the southeast of the city, with a total length of 8.46 kilometers and a catchment area of 1 1 square kilometer. It is an important river for the discharge of rainwater and sewage in Linyi City, and also a place for citizens' leisure and entertainment.
"When I first came to Linyi in the 1960 s, qinglong river was crystal clear, with water plants floating and fish and shrimp infested; Around the 1990s, industrial wastewater and domestic sewage were discharged in large quantities, and the river was yellow and black, dirty and smelly. By the 2nd/Kloc-0th century, qinglong river had completely turned into a stinking backwater. It's so sad to watch! Zhang Zhongsheng, a member of CPPCC from Zhejiang, said so. In 2002, during the "two sessions" of the city, he submitted a proposal on the renovation of qinglong river with detailed investigation, concrete measures and sincere words, and was awarded as the proposal of that year 1.
Du Jiaju, 74, and Wang, 76, from Xinzhuang Lane, Yanchi Street, lanshan district, have lived by the Qinglong River for generations. They have a deep historical memory of qinglong river's change from clear to turbid. "Before liberation, qinglong river and the city wall were separated. In the past, it had to go through the south gate. On both sides of the river, there are long slopes with crops. From before liberation until the sixties and seventies, the residents nearby went to the river to fetch water to eat-the water came from the Su River and was sweeter than the water from the Yi River. Also washing clothes, fishing and touching shrimp by the river; Take a bath in the river in summer night. At that time, the river was wider than it is now. The narrowest part of the water is six or seven meters, and it is fifteen or six meters wide near the Dongfanghong Cinema. Modified after qinglong river 1980. Houses were built along the wall of the old city by the river. There is a large population, running water, and garbage is dumped into the river casually, and no one cares. In addition, the Su River is polluted, and qinglong river has become a stinking ditch. There is nothing else to live here, but there are many mosquitoes and a big smell! "
According to the feasibility study report of comprehensive improvement of Qinglong River water environment, more than 95% of Qinglong River water is sewage in dry season, with serious water pollution and poor environmental sanitation, which affects urban safety and people's physical and mental health. There are many water retaining structures in the river, the riverbed is seriously silted, the riverbank is thin, the buildings on both sides of the river are messy, the river landscape is gloomy and messy, and the infrastructure on both sides of the river embankment is not matched, which is extremely inconsistent with the development of the whole city and the appearance of the city.
"From the 1980s to 2006, the government has managed qinglong river three or four times, but it has not fundamentally changed this dirty river and messy environment." Lu Laisheng, head of the municipal department of the Municipal Construction Bureau, said.
It is urgent to comprehensively renovate qinglong river, comprehensively renovate the river water environment, restore the natural features of the ancient city, and create an excellent living environment.
Interception of pollution and siltation presents a clear river.
In 2006, Linyi Municipal Party Committee and Municipal Government put qinglong river governance project into the key project. After many investigations, it is finally determined that the whole line of qinglong river will be widened and dredged according to the drainage standard of once every five years, and sewage interception pipelines will be laid along the river; Riverside landscape construction. According to the principle of unified planning, one-time design and phased implementation of the municipal government, the first phase is pollution control, and the second phase is river landscape and greening construction. The treatment project is estimated to invest 53 million yuan.
On March 8th, 2006, the first phase project of qinglong river started. The project is divided into four blocks from north to south and promoted at the same time. The construction difficulties of each block are varied. Su He Gate to Jiefang North Road is the first bid section of the project. Because the underground river has not been cleaned for a long time, there is a lot of silt, and animal carcasses can be seen everywhere, emitting stench and biogas, which can smoke people down in a few minutes. The construction environment is particularly harsh, and it is impossible to set up a working surface along the way, so that mechanical vehicles cannot enter. In such an environment, the construction team of Juxian Municipal Engineering Company just shoveled the shoulder, cleared the silt 1 1,000 cubic meters and thoroughly cleaned the river.
Jiefang Road North to Jinqueshan Road North is the second bid section, and many construction areas are near residential areas. Because of traffic control during the day, transport vehicles can't enter the construction site, and in order to avoid noise disturbing people, construction can't be carried out at night. At the same time, because the project spans the whole flood season, it is necessary to ensure that a large number of domestic sewage and industrial wastewater are removed in time, so as to ensure the safety of the city through the flood season without affecting the construction progress.
The construction team of Ganyu Municipal Garden Company in Jiangsu Province adopted the construction method of subsection enclosure and drainage. In order to lay the pipeline, they backfilled more than 12000 cubic meters of construction waste, and then transported it away after the pipeline was laid, and the silt was removed from the whole line up to 12000 cubic meters.
Pipe jacking is the key to the successful completion of the whole treatment project. Customs Road North to Jinqueshan Road is the third bid section, which is a concentrated place for living and transportation. In order not to affect the traffic, engineers of Linyi Shuntong Municipal Maintenance Co., Ltd. adopted the jacking grouting pipe technology and made some progress through pipe jacking. When encountering other pipelines, all kinds of underground pipe networks are criss-crossed, and they can't continue to top, so they can only raise or dig low, or re-pipe jacking. In some areas, the pipe jacking technology has been changed as many as five or six times.
The road surface from the front street of the cemetery to the south yard of the Municipal People's Hospital is 289 meters full of rock structures, and the underground excavation of 6 meters is full of hard rock layers. The sewage pipeline is laid by pipe jacking, so it cannot be constructed without blasting. Blasting will neither destroy the road surface nor affect the earthquake resistance of the city. Blasting must be carried out in a small area bit by bit in a space that can only accommodate one person, and then rock is carried out bit by bit, and only 20 to 30 centimeters can be pushed in a day.
Lu Laisheng, chief of the municipal department of the Municipal Construction Bureau, introduced that the first phase of the qinglong river treatment project started on March 8, and 1010 was completed. The sewage interception pipeline was 8.46 kilometers, with a pipe diameter of 1200mm, and the rainwater and sewage were diverted, and it was 21/kloc-0 along the river. In rainy season, clean rainwater flows in qinglong river. In the dry season, the river will be diverted to qinglong river, which will completely change the situation of "stinking in sunny days and sewage flowing in rainy season" in qinglong river, and the scenery of "aquatic plants floating with the water, fish swimming with fine stones, clearly visible" will be presented to the public again.
Tailored cultural landscape belt
According to Lu Laisheng, chief of the municipal department of the Municipal Construction Bureau, the second phase of qinglong river River Regulation Project is to landscape the river. Construction of 15m landscape green belts on both banks of qinglong river will improve the environmental quality of qinglong river in an all-round way through lighting and hardening construction, making it a "Shili Qingshui River Scenic Belt", achieving the effect of "smooth river, clear water, green shore and beautiful scenery", improving good hydrophilic activity space for residents and tourists, creating a comfortable and pleasant green environment and creating a sense of Linyi city history and culture.
The principles of landscape planning in qinglong river are: implementing zoning planning to reflect the harmony and unity of urban functional zoning and qinglong river landscape zoning; Through the organic combination of historical background and modern civilization, Linyi has a long history, profound cultural heritage and modern civilization; Take the river as the axis, plan along the coast, adjust measures to local conditions and guide the situation. Make full use of the existing idle land on both sides of the strait to arrange scenic spots, reduce demolition and save investment; Highlight the characteristics of "water city" and reflect the harmony between humanity and nature.
According to the principle of functional zoning and landscape zoning in the overall urban planning of Linyi City, combined with the planning and site selection of water storage projects, it is planned to divide the landscape planning of qinglong river into eight scenic spots, which are from top to bottom, namely, bamboo forest green, the legacy of scholars, the mighty Yimeng River, Yishui Changliu, Shuangque River near, Jintan rest, lake green and reed fragrance. Scenic spots are connected by colored brick tunnels, and trees, flowers and shrubs, perennial flowers and green grass are connected, making the two sides of qinglong river an interconnected urban landscape belt, which embodies the landscape artistic conception of "bending, quietness, seclusion and depth".
Bamboo grove green: This scenic spot is located between Tongda Road and Yanchi Street. Landscape planning takes bamboo community and bamboo bridge as the background, bamboo as the theme, green as the main tone, bamboo forest and grass alternate, bamboo chairs, bamboo pavilions and bamboo railings are connected with each other. The design will widen the river channel and build an island in the middle of the lake. Construction of hydrophilic platforms on the west side of Zhu Lin Bridge in Hebei and the south bank of Huxin Island. Take advantage of the wide water surface and deep water in this reach to provide hydrophilic space for paddling. The pavement of tunnels on both sides of the Taiwan Strait adopts cobblestone or ice pavement, which embodies the landscape characteristics of bamboo forest and green grass and the design concept of harmonious coexistence between man and nature.
Legacy of the Book Sage: The scenic spot is located between Mazimiao Street and Yimeng Road, adjacent to Wang Xizhi's former residence, and the landscape planning is positioned as the radiation and marginal area of Wang Xizhi's former residence. Greening is mainly based on weeping willows and Kentucky bluegrass, with high and low collocation and alternating arrangement; Set up anti-corrosion wooden book kiosks, galleries, chess tables and Shi Jing along the river, forming an environmental atmosphere to understand the long history and profound cultural heritage of the hometown of Shusheng.
Wei Yimeng: The scenic spot is located between Yizhou Road and Jiefang Road, with the Red Garden in the east and the old city gate and the original site of the city wall in Linyi in the west. In the battle to liberate Linyi, countless martyrs died here. Landscape design is mainly based on memorial and education square, corresponding to Dongfanghong Garden in the west. A gate-shaped sculpture is set up in the square to commemorate the relief; Plants with pine and cypress as the background, decorated with ancient trees and magnolia trees, symbolize Yimeng's long-term, heroic and fragrant meaning.
Yishui Changliu: This scenic spot is located between Zhangshu Mountain Road and the front street of the cemetery, with the East China Revolutionary Martyrs Cemetery in the east and Hongsao and the tree-lined square in the west. The landscape planning takes the Martyrs Cemetery and Hongsao sculpture as the background, which reflects the fine tradition of Yimeng people's perseverance, hard work, courage to fight and love peace, as well as the beautiful scenery of Yimeng. Transform the river on the north side of the west gate of the cemetery to create a tortuous waterscape; The natural rest square in front of the Civil Affairs Bureau in the south is lined with trees and leisure trails, echoing the north. An overflow rubber dam is arranged in the middle. The trees along the river are dominated by conifers and weeping willows, and the tree-lined leisure area is dominated by ginkgo, persimmon and Sophora japonica, dotted with spring flowers, forming a plant landscape with dense shade and flowers. Sidewalks, kerbs and railings are made of granite; Zisha rock is used for building columns and doors. There is a granite sculpture symbolizing peace in front of the west gate of the cemetery.
Shuangque Riverside: This scenic spot is located between Yizhou Road and Jinque Mountain Road, and the overall urban planning of this area is cultural entertainment. Landscape planning is positioned as the radiation and marginal area of the bamboo slips museum of Han tombs, with bamboo slips of Han tombs in Jinque Mountain and Yinque Mountain as the historical background. The scenic spots with cultural connotations, such as "Wu Zu's suicide note" and "bamboo slips for fun", are properly arranged in combination with the terrain, which embodies Linyi's long history and regional culture. Trees along the river are mainly Magnolia grandiflora and Metasequoia glyptostroboides, and large persimmon trees are planted. A large area of green land is set up with micro-topography ups and downs, and the road surface is paved with grass, forming a plant landscape with shade to protect summer.
Jintan rest: this scenic spot is located between jinqueshan road and Jinyuan road, passing through Jintan residential area. Although there are many open spaces on both sides, they are fragmented. Therefore, landscape planning emphasizes functionality and pays attention to community culture, entertainment, leisure and fitness. Greening is mainly based on big trees, dotted with flowers and shrubs. The pavement is paved with colored bricks and grass, and the railings, guardrails and partitions are made of stainless steel pipes. Set up leisure seats, children's amusement facilities and adult fitness equipment; Appropriate local folk story sculptures, such as "killing trees to protect neighbors", "lying on the ice to seek fish" and "digging walls to steal light", are set up at intersections and on both sides to advocate good-neighborly and friendly life relations and carry forward the national traditions of being diligent and eager to learn, loyal and filial.
Green lake: the scenic spot is adjacent to Binhe Avenue and Xiaobudong Rubber Dam. The overall urban planning is residential land, and the present situation is urban planning area. The landscape planning is located in the landscape radiation area of Binhe Avenue and Xiaobudong Rubber Dam. The landscape is located in the landscape area dominated by rural natural landscape, with kite square, artificial flooded beach, plank road near Shui Mu, small campsite and other attractions, which is convenient for tourists to carry out outing activities. The main plants are Pterocarya stenoptera and Ailanthus altissima, and the autumn leaves are Acer truncatum and Cotinum coggygria. Interplanted together, a lush and colorful plant landscape has been formed.
Adan, Dang Wei: This area is adjacent to the lakeside green space. The local water surface will be appropriately expanded, and the water surface will be formed into areas with different shades by engineering means, which is convenient for the growth of aquatic plants and swamp plants and forms the urban wetland landscape. There are hydrophilic platforms, children's fish ponds, frog ponds and Diaoyutai in the area. The main plants are Sapium sebiferum, Tang Di, Iris, February Orchid, Water Lily, Acorus calamus, Hemerocallis, Solanum lyratum and so on.