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Important Issues in Reconstructing Villages in Guangzhou

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更新时间:2018年06月06日01:11:02 打印此页 关闭 Hits: 1738 Updated: June 6, 2018 01:11:02 Print this page Close
Low-impact development is the world trend of urban development. Various countries and regions are actively exploring low-impact development methods.
Comments on the sponge city are also being suspended in the process of urban village reconstruction.
1. The environmental achievements of the village in the city The village in the city is the product of China's rapid urbanization process, which seriously lags behind the ages and constitutes a phenomenon of incoordination in the city.
1.1 High building density, low landscaping area, high urban village density. Residents can build new houses at will, and some urban village buildings have a density of more than 70%, or even 90%.
1.2 The distance is not trivial. The hardening of the pavement affects the large amount of water infiltration in rainwater. The hardening of the pavement affects the infiltration of groundwater. The hardened pavement in the high-density building group is trivial, which will cause the city's water to infiltration and cannot be cleaned. It poses a great danger of flooding.
1.3 Public facilities such as oasis and square are perfect The parks and oasis in the village in the city are seriously lacking and lacking, and the existing oasis and square are preempted.
1.4 The lifestyle of rural residents in poor urban ecological environments has not been fundamentally changed, so that domestic and consumer sewage is discharged into rivers or farmland nearby, and solid wastes are piled up in disorder.
2 Deal with countermeasures Aiming at the results of the above-mentioned urban villages, according to the practice of sponge cities, choose low-impact development to deal with the results of urban villages.
2.1 Renovation of residential areas The renovation of urban villages and urban villages shall be suspended according to the plan. Green environmental protection materials shall be selected to increase the beautified area of the city and improve the ecological environment of the city.
A green roof can be set up on the roof. Rainwater can be collected and used for landscaping through collection equipment. Other rainwater can pass through the sunken community oasis. Some of the rainwater seeps into the country to make up groundwater. Other rainwater enters the infiltration and discharge integrated equipment and infiltrates through the ground After all, the rainwater entering the rainwater pipe drains out.
All pavements in a residential area are paved with permeable bricks , which is beneficial to seepage under rain and to deal with the results of waterlogging in villages in the city (see Figure 1).
Improvement of distance equipment In the process of urban village renovation, it is indispensable to improve the distance equipment. If it is established in the way of traditional city establishment, hardened roads are everywhere.
Whenever there is heavy rain, drainage should be carried out in accordance with "grey" equipment such as storage channels and pumping stations.
In the new construction and reconstruction project of the village in the city, laying permeable bricks , erecting water collection ponds, reconstructing curbstones, etc., when raining, part of the rainwater seeps down to make up groundwater; part of it enters the rain collection tree box and the main street ecological dispatching pool, and then is suspended. Use; the initial part enters the sewer and drains into the rainwater pipe (see Figure 2).
2.3 Improvement of public spaces such as parks, oasis, squares In the process of renovating villages in the city and villages in the city, it is necessary to add public space or improve public space. The transformation of parks, oasis, and squares can not only improve the generality of the city, but also Residents provide public places for recreation, culture and entertainment. Together, they can also improve the ecological environment in the field, allowing residents to integrate with nature, be close to nature, and feel natural.
Through permeable squares, sunken oasis, blister scenes, wetland scenes, rain gardens, etc., part of the rainwater makes up for groundwater, part of it is collected and reused, and part of it is discharged (see Figure 3).
Figure 32.4 Rainwater pipe network improvement During the process of urban reconstruction, the reconstruction of the rainwater pipe network is related to the drainage of the entire city and the occurrence of flood disasters. In the past, rainwater was discharged directly through the pipes. This constitutes a great waste of water resources. Drainage will constitute a flood disaster. The sponge city plan has dealt with this result well, reducing the flow rate of rainwater, making up for groundwater, and wasting water resources.
Rainwater through infiltration, stagnant storage, pollution, reuse, start the remaining part of the runoff through pipe networks, pumping stations, and then can effectively advance the trivial specifications of urban drainage, reducing the pressure of urban waterlogging (Figure 4).
Keywords: sponge city; village in the city; low-impact development u=131808196,1893043165&fm=27&gp=0_meitu_8.jpg
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