What are the requirements for the design of rainwater reuse systems in the Jiangsu Province Green Building Design Standards? Introduction to construction projects?

The green building design standards in Jiangsu Province are formulated to standardize green buildings in Jiangsu Province and improve the level of green building construction. Jiangsu Province Green Building Design Standards apply to the green design of new, renovated and expanded civil buildings in Jiangsu Province. Among them, what are the requirements for the design of rainwater reuse systems in Jiangsu Province’s green building design standards? The following is an introduction brought by Architectural Network about the requirements for the design of rainwater reuse systems in Jiangsu Province’s green building design standards for reference.

Based on local rainfall characteristics, make full use of site space, rationally set up green rainwater infrastructure, and reduce surface runoff of rainwater.

Reasonably determine the range of rainwater infiltration based on the landscape design of the master plan, and adopt rainwater infiltration measures. The area of ??the underlying surface for infiltration shall not be less than 50% of the project's land area excluding the roof area.

Make full use of green spaces, water bodies or site space to reasonably determine the form and scale of rainwater bioretention facilities.

Adopt ecological measures that match the landscape to guide, regulate, store and purify rainwater from impermeable underlying surfaces such as roofs to reduce runoff pollution.

The total amount of runoff should be controlled for rainwater on the site, and the annual total runoff control rate should not be less than 55%.

The designed drainage flow of the site's rainwater drainage facilities should be checked according to the conditions without "green rainwater infrastructure", and its drainage capacity should not be less than that without "green rainwater infrastructure" ability.

The scheme and design scale of the rainwater reuse system should be determined through water balance and technical and economic comparison.

The purpose of reused rainwater should be determined based on comprehensive considerations such as the amount of recyclable water, the change pattern of water use time, water quality requirements and other factors.

The water treatment plan of the rainwater reuse system should be reasonably determined based on the scope of rainwater collection and the purpose of reused rainwater after technical and economic comparison.

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