Characteristics of Beijing Garden Expo

Beijing garden expo embodies the spatial layout of "one axis, two points, three belts and five parks". One axis is a circular axis that runs through things; Two points are the Garden Museum and Jinxiu Valley; Three belts, that is, three green landscape corridors extending from "Fengtai Park West Area of Zhongguancun Science Park" to the Garden Expo Park; The five major exhibition gardens are five core exhibition areas with their own characteristics, namely: traditional exhibition garden, modern exhibition garden, creative exhibition garden, ecological exhibition garden and international exhibition garden.

Beijing Garden Expo will build the first China Garden Museum integrating various scientific and technological means in China, focusing on the new achievements made in China's garden industry, showing the panorama and development platform of garden art. The construction of Beijing Garden Expo will adopt different ways to enhance interaction and participation, promote the concept of green eco-environmental protection to the whole society, and demonstrate the scientific and rational use of new energy-saving and environmental protection materials, new technologies, new processes and low-carbon environmental protection technologies such as reclaimed water, solar energy and wind energy, which will also become a highlight of Beijing Garden Expo.

Yongding River Reclaimed Water Helps Beijing Garden Expo

20 13 In May, the 9th China International Garden Expo will be held in Beijing. Fortunately, the World Expo provides a new opportunity for the management of Yongding River. Lugou Xiaoyue was once one of the famous "Eight Scenes of Yanjing" in Beijing. However, with the years of dryness and ecological degradation of Yongding River, this beautiful scenery has disappeared for 30 years. The dry Yongding River once became a landfill and the biggest "sandstorm source" in western Beijing. Beijing has tried many times to harness the Yongding River, but failed because of lack of water. Restoring river ecology is inseparable from "flowing water at the source". With the waterscape, we can reproduce the grand occasion of "Lugou Xiaoyue". But where does the water come from? In this city, where the per capita water resources are only about 65,438+000 cubic meters, far below the national average, it would be "extravagant" to use fresh water to make Yongding River usable. "The Yongding River in Beijing has been cut off for 30 years, and it is reclaimed water that brings it back to life." Deng, deputy chief engineer of Beijing Water Conservancy Planning and Design Institute, said. The reporter learned that in the water resources allocation scheme put forward by Beijing Water Affairs Bureau, reclaimed water and rainwater utilization become the main force: Qinghe and xiaohongmen reclaimed water plants provide reclaimed water of 65.438+0.2 billion cubic meters, rainwater utilization of 2 million cubic meters, and Guanting Reservoir provides standby water of 6.5438+0.0 million to 30 million cubic meters. "Before the reclaimed water from Qinghe Reclaimed Water Plant was connected to Yongding River, Lugouqiao Reclaimed Water Plant with a daily processing capacity of 65,438+10,000 tons and toilet flushing water from South-to-North Water Transfer Project also played a role." Liu Xueyan, an engineer at Beijing Water Conservancy Planning and Design Institute, told the reporter. It is not enough to have water, but the water quality must meet the standard. According to the local standard formulated by Beijing 20 12, the water quality should reach the third grade or above, so that people can be hydrophilic and play in the water, while the reclaimed water treated by the reclaimed water plant can only reach the fourth grade. "If the treated reclaimed water quality is to be upgraded to the standard above Grade III, its cost will be doubled. Liu Xueyan said. Therefore, Beijing Water Conservancy Planning and Design Institute has specially designed the purification method of constructed wetlands, so that the water quality of Bohu Lake in the Garden Expo Park can reach more than three standards. " The pollutants are mainly ammonia nitrogen. Constructed wetlands can work like human kidneys. Excessive ammonia nitrogen and other substances will be absorbed by aquatic plants and lake bottom fillers through the purification of wetlands. Wei Wei, an engineer from Beijing Water Conservancy Planning and Design Institute, said that the water system of Beijing Olympic Park has adopted a similar design. After a series of scientific planning, design and renovation, Yongding River has been completely transformed before the World Expo. Overlooking Beijing, the five lakes-Chengmen Lake, Shilian Lake, Xiaoyue Lake, Wanping Lake and Yuanbo Lake-are like five pearls embedded in the land in the west of Beijing. "Running water does not rot", only by making water move can it become "living" water, maintain the purification function of water body and give play to the ecological value of rivers. In order to make the water "alive", Beijing has specially designed a circulating system consisting of pumping stations and pipelines, that is, the "first line", so that the water of the "five lakes" can be recycled, which can save 25% to 30% of ecological water consumption every year. "By artificially designing the gap and letting the water fall step by step, the oxygen content of the water body can be increased." Wei Wei said. (Reporter Zhang Huaijun/Beijing photo report)