Sponge city is a new generation of urban stormwater management concept, which means that the city can adapt to environmental changes and respond to natural disasters caused by rainwater like a sponge, and has good elasticity. It can also be called a “water elastic city”.
Like a sponge, the city can adapt to environmental changes and respond to natural disasters with good “elasticity”. The international general term is “low impact development rainwater system construction”. When it rains, it absorbs water, stores water, infiltrates water, and purifies water. When needed, the stored water is released and used to achieve the free migration of rainwater in the city.
Starting from the ecosystem service, the construction of water ecological infrastructure across scales and the construction of water ecological infrastructure in combination with multiple specific technologies are the core of the sponge city.
Rainwater collection refers to the collection and utilization of rainfall runoff collected from hardened surfaces such as building roofs, roads, and squares. The rainwater is accumulated through channels such as collection-water transmission-water purification-storage, and collected to provide rainwater replenishment for greening, landscape water bodies, washing and groundwater sources, so as to achieve the purpose of comprehensive utilization of rainwater resources and water conservation.
Rainwater collection and utilization system
What are the uses of collected rainwater?
It can be used to flush toilets, sprinkle roads, irrigate lawns, replenish water for waterscapes, and even be used as circulating cooling water and firefighting water. It can effectively alleviate the current tense situation of urban water shortage and is an effective way to increase revenue and save expenditure.
Rainwater can be infiltrated through permeable paving materials and green spaces to replenish groundwater resources, improve the ecological environment, and effectively replenish freshwater resources.
When the rainfall exceeds the urban drainage volume, the rainwater collection module is used to store rainwater to reduce the pressure of urban drainage and flood control, thereby improving the stability and reliability of the urban flood drainage system and reducing urban flooding.
مزايا أنظمة حصاد مياه الأمطار
1.It can save 50% of drinking water, and rainwater can be used for flushing toilets, washing clothes, cleaning and other non-drinking purposes;
Economical: It can save considerable costs;
2.Protect the environment: It protects natural water resources, and “soft” rainwater can reduce the use of descaling agents;
3.Less rainwater flows into sewage treatment plants, less energy consumption and the use of chemicals;
4.Less scale: Rainwater is soft water, so there is less scale accumulation in washing machines and flushing toilets.
Rainwater collection tank
The rainwater collection pool is a product dedicated to rainwater collection and utilization systems and sponge city construction. It is made of polypropylene (PP) material and has the characteristics of being lightweight, strong, corrosion-resistant, non-toxic and odorless. The special structural design of the rainwater collection pool enables it to efficiently collect and store rainwater, and can be used for irrigation, flushing, cleaning and other applications through pipe connections. The rainwater collection pool has a large space capacity and can be flexibly combined according to actual needs, suitable for various geographical environments and places.
PP module features:
1) Main technical parameters
1000mm (L) * 500mm (W) * 500mm (H)
2) Flexible product design, composed of several modules to form a pool,
The shape of the pool can be arbitrarily combined according to needs, not limited by the site.
3) Long service life, the module is made of PP recycled material, the material is durable, resistant to aging, high temperature, low temperature, and can adapt to various harsh
environments.
4) Simple construction, using module splicing, no large machinery required.
5) Convenient transportation, using split design, the module can be disassembled at will, saving transportation space.
6) Short construction period, the module is assembled into a box at the construction site, safe and fast. Greatly shorten the construction period, can achieve the same day installation and backfilling.
7) Green and environmentally friendly, the rainwater collection module is made of renewable and environmentally friendly materials, buried deep underground without destroying the entire ecological environment,
easy maintenance, and recyclable.
8) The cost advantage is outstanding. Compared with traditional water storage tanks, rainwater modules reduce time costs, labor costs, transportation costs, and subsequent maintenance and operation costs in many aspects.
HDPE Geomembrane
Performance characteristics of HDPE geomembrane
1) Main technical parameters
1000mm (L) * 500mm (W) * 500mm (H)
2) Flexible product design, composed of several modules to form a pool,
The shape of the pool can be arbitrarily combined according to needs, not limited by the site.
3) Long service life, the module is made of PP recycled material, the material is durable, resistant to aging, high temperature, low temperature, and can adapt to various harsh
environments.
4) Simple construction, using module splicing, no large machinery required.
5) Convenient transportation, using split design, the module can be disassembled at will, saving transportation space.
6) Short construction period, the module is assembled into a box at the construction site, safe and fast. Greatly shorten the construction period, can achieve the same day installation and backfilling.
7) Green and environmentally friendly, the rainwater collection module is made of renewable and environmentally friendly materials, buried deep underground without destroying the entire ecological environment,
easy maintenance, and recyclable.
8) The cost advantage is outstanding. Compared with traditional water storage tanks, rainwater modules reduce time costs, labor costs, transportation costs, and subsequent maintenance and operation costs in many aspects.
Performance characteristics of HDPE geomembrane
1.It does not contain chemical additives and is not heat-treated, so it is an environmentally friendly building material;
2.It has good mechanical properties, good water permeability, and can resist corrosion and aging;
3.It has strong anti-burial and corrosion resistance, and the structure is fluffy, with good drainage performance;
4.It has a good friction coefficient and tensile strength, and has geotechnical reinforcement performance;
5.It has isolation, anti-filtration, drainage, protection, stability, and reinforcement functions;
6.It can adapt to uneven bases, resist external force damage during construction, and has small creep;
7.It has good overall continuity, light weight, and convenient construction;
8.It is a permeable material, so it has good anti-filtration and isolation functions, strong anti-puncture ability, so it has good protection performance.
Smart sponge city construction plan
- Extensive use of natural ground
Sponge cities should avoid large-scale hard paving, but use a large amount of natural ground, such as planting lawns, cliffs
steep walls and other terrains to reduce water flow speed and guide surface water to infiltrate the ground, and increase the natural groundwater level. - Multi-level, multi-functional green space system
A multi-level, multi-functional green space system is set up in the city, such as water ecological parks, street gaps, green roofs, etc.
At the same time, rainwater is collected and treated to meet the needs of urban greening. - Build rain gardens and rainwater markets
Set up rain gardens and rainwater markets in the city, and through methods such as collecting, filtering, purifying, storing and distributing rainwater,
realize the purification and recycling of urban rainwater.
In short, smart cities and sponge cities are the direction of future urban construction, which requires the joint efforts of the government, enterprises and all sectors of society
to promote. Only through the construction of smart cities and sponge cities can a more livable, healthy and friendly urban environment be created, and the sustainable development of cities be promoted.
Sponge city construction facilities: environmentally friendly rainwater inlets, infiltration channels, rainwater collection pools, permeable pavements, green roofs, bioretention facilities, sunken green spaces, infiltration ponds, infiltration wells, infiltration pipes, wet ponds, rainwater wetlands, reservoirs, rainwater tanks, regulating ponds, regulating pools, grass-planted ditches, vegetation buffer zones, initial rainwater discharge facilities, artificial soil infiltration, and also includes all rainwater pipe networks, rainwater pumping stations, etc.
