The development trend of urban rivers and waterfront space Throughout the world's famous historical cities, there is almost always a famous river, such as London and Thames, Paris and Seine, new york and Hudson, Vienna and Danube, Shanghai and Huangpu River ... In modern times, rivers are the soul of urban development, with many functions such as water supply, nature protection, tourism and entertainment, transportation, culture and education. It has played an important role in urban ecological construction and expansion. Nowadays, urban rivers have really begun to change from shipping and pollution-receiving functions to shaping the environmental functions of international metropolises. Urban river waterfront has gradually become the most dynamic area in the city. It not only contains rich natural landscape, but also includes the physical space and human landscape of urban waterfront. It is a public space for urban residents' activities, an important place for tourism and a historical epitome of urban development. Successful case of waterfront space development of international urban rivers 1. Thames in Britain: The Thames is about 400 kilometers long. With the rise of the industrial revolution, the population surged and the water quality deteriorated rapidly, and it became a "dead river" by the end of 1950s. In the 1960s, the British government ruled the river again. Through legislation, strict regulations have been made on the discharge of industrial wastewater and domestic sewage. After nearly 20 years of hard work, the Thames has taken on a new look and become a must-see for British tourists. Fashion and creativity to create a new core tourist attraction. On both sides of the Thames, creative arts have created fashionable waterfront space, and the London Eye, Millennium Bridge and New Millennium Square have all become new attractions. Through the implantation of cultural and creative industries, the old industrial areas and old urban areas on the south bank of the river have been transformed, which has also become a new bright spot of the city. Return the river to the people and create a rest space for Londoners. More than 0/00 open spaces along the Thames/Kloc have been rectified and improved, and private houses in urban areas are rarely built by the river. Riverside space has truly become a free park for citizens and a public welfare open tourist attraction. 2. San Antonio River in the United States: The 240-mile-long San Antonio River runs through the whole city and breeds everything in San Antonio. After management, it now receives more than 7 million tourists every year, and 1000 large-scale conferences are held here. San Antonio was praised as "the second most popular tourist city in the United States and the ninth most popular tourist city in the world" by the famous travel magazine Coney Traveler. Waterfront commerce and hydrophilic space make San Antonio a world-class tourist attraction. RiverWalk is a manually excavated canal, about 2 kilometers long. The riverside trails on both sides of the river are connected with the roads above by more than 30 stairs. The river is covered with exotic flowers and tropical shrubs, and softened by Little Square, stairs, platforms and green belts. There are many shops on both sides of the river, including tourist hotels, restaurants and art shops, among which river center-terMall is the largest comprehensive shopping center in the city. The rational utilization and management of water resources is the lasting guarantee of the holy river. The water source of the San Antonio River mainly comes from groundwater. Usually, the river water in the riverside trail area will be updated once a year in January. The underground spillway tunnel with a length of more than 6 kilometers can accommodate the flood with a return period of 1 0,000 years. Usually, water is supplied to the riverside trail area by pump for recycling. 3. Setogawa, Japan: Setogawa, a small ditch that flows through the downtown area of Furukawa-CHO, was once a dirty sewer in the 1960s. With the support of a newspaper and organization in the town, the residents mobilized, cleaned it up and gradually transformed it into a clear stream in which thousands of koi fish swam. Together with neat traditional wooden houses and clean streets, Furukawa-CHO was awarded the "Japan Association for Creating Tomorrow". The construction of riverside leisure space provides high-quality rest places for residents. Belt-shaped leisure trails planted with trees along the river give people more space for activities, effectively use abandoned empty houses and open spaces, and design a community environment with local characteristics and styles based on traditional culture. For example, the overpass originally set up for students was changed into an underground passage because it destroyed the original landscape characteristics, and the entrance and exit of the underground passage was a wooden building with Furukawa-CHO characteristics. Adjust measures to local conditions, teach students in accordance with their aptitude, and fully display local culture and characteristics. Furukawa-CHO is the hometown of carpenters, and there is an unwritten old local rule that new buildings must be mainly made of wood and not higher than three floors. With the persistence of residents, the traditional urban landscape has been maintained, and the wood-based buildings and the carpenter cultural center flying in parallel have become another source of sightseeing economy. Although the development of urban rivers and waterfront space has its own characteristics and models, its success factors are mainly reflected in the following aspects: ① River cleaning and flood control, which are the basic prerequisites for making full use of rivers to develop urban space; (2) People-oriented, ecological embankment construction is the development trend of modern urban river management; (3) Creating waterscape and creating urban waterfront environment and public space are important contents of urban planning and construction; (4) Developing in stages, adapting to local conditions and highlighting characteristics are the key to enhancing tourism attraction. Taking Xinjin project as an example, this paper explores the development of urban rivers and waterfront space in China. Xinjin is a suburb of Chengdu. In Chengdu, which is rich in tourism resources, the comprehensive advantage of Xinjin's traditional tourism resources is not obvious, but in terms of innovative resources, the core advantage of Xinjin is "water" (the water area is 33.5 square kilometers, accounting for10% of the county area): ① The river network density is high, and the river network density of Xinjin is high. (2) Water resources are evenly distributed. The five rivers in Xinjin are evenly distributed in various areas in the southeast and northwest of Xinjin, and the intersection of the five rivers is the core city of Xinjin; ③ The development of water resources has relatively comprehensive advantages. Wuhe River is suitable for creating leisure tourism activities and landscapes with different hydrophilic experiences, such as Nanhe River with the best scenery, Minjiang River with wide waters and Jinma River with good ecology, regardless of water depth, current speed or related resources around the waters. In order to develop Xinjin tourism market and create tourism projects with Xinjin characteristics, Xinjin county government entrusted Qichuang tourism consulting operators to carry out the overall planning of Xinjin county tourism development and the conceptual planning of Xinjin water city tourism development, so as to guide and promote the take-off of Xinjin tourism. Qi Chuang grasped the outstanding characteristics of water resources in Xinjin, strategically put forward the strategy of "prospering tourism with water and prospering the city with water", and recommended three water-related image slogans: "Tianfu Wujin Dream Water City", "Tianfu Wujin Fishing Water City" and "Shuixinjin Fishing World". Based on respecting the natural mechanism, giving priority to ecological protection, creating a continuous intersection between humanity and nature, and strengthening the connotation of "cultural water", Qichuang put forward the development idea of building a livable benchmark water-friendly city. In the construction of water space, it is mainly "five Tianjin as the vein, four cities as the core, lakes dotted, wetlands dotted, islands embedded, beaches and bays dependent, banks corresponding, streams connected", with a number of gold nodes as the core, to create a "global water city" with water veins connected. Five Tianjin as the pulse: mainly taking the five major water systems in Xinjin as the pulse, according to local conditions, we will focus on creating different water system landscape belts and scenic spots along the river; Four cities as the core: combine the development of cities along the Yangtze River to create a small water city with different themes such as fashion and dynamic, secluded ecology and nostalgic memory; Lake decoration: focus on building five lakes with different functions; The finishing touch of wetlands: combining the status quo of the four wetlands, overlapping different functions such as conservation, meeting and recreation; Embedded in the island: building five characteristic islands such as wedding, camping and living; Beach bay dependence: build 3 beaches and 3 bays; Corresponding dikes: building five dikes, etc. In the application of water element, the methods of leaving water, stringing water, diverting water, borrowing water, isolating water, still water, playing with water and running water are adopted.

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