Water Supply and Drainage Design for Water Parks and Swimming Pools

The regulations for water supply and drainage design in swimming pools and water parks have been revised from the original “Swimming Pool Water Supply and Drainage Design Code CECS14:89” by the China Construction Standardization Association, alongside the China Architecture Design and Research Institute and other relevant bodies.

There are numerous similarities between the design of various amusement and leisure pools in the water park and their auxiliary devices, such as water inlets and outlets, overflow tanks, and the design of washing facilities and swimming pools. However, amusement and leisure pools have more complex functions and facilities compared to swimming pools. This complexity affects the plane shape, water depth, water temperature, circulation time, circulating water volume, and the layout and structure of various water inlets and outlets. The water supply and drainage design for water purification treatment systems, both large and small circulation systems, is more diverse than that of traditional swimming pools.

Firstly, Main Design Parameters of Each Entertainment Pool

1. The primary design parameters for entertainment pools are detailed in Table 12-4-1.

2. Adjustable water inlet DN50, flow rate 5-8m3/(h·piece); overflow outlet DN50; pool wall backwater outlet DN50, flow rate 5-8m3 (h·piece); skimmer DN50, flow rate 1-2m3/(h·piece).

3. The circulating water supply pipe has a flow velocity of 1.0m/s, while the circulating water pipe has a flow velocity of 0.7m/s.

4. The required circulating water volume for slides and the number of users on the slides are shown in Table 12-4-2.

5. Balance tank volume is calculated as (1.2~1.35) x single tank volume, with a 15-minute backwash water volume of 50m3.

6. The water park is designed to accommodate 2.2m3 per person, with a maximum capacity of 266 people.

7. Each piece of equipment can hold a total of 991 people.

Secondly, The Design of the Circulating Water System

Pools with the same water temperature, such as the wave pool and slide pool with a water level difference of 0.13m, share a water treatment and heating system. Pools with different water temperatures, like the children’s pool and leisure pool with a water level difference of 0.85m, use one water treatment system and two heating systems. The treatment capacity of the two water treatment systems is 200m3/h. The circulating water purification system employs a parallel forced circulation water supply method, with each pool using a counter-current circulation method. This means the circulating water enters the pool from the bottom and exits through the overflow outlet, skimmer, and backwater outlet around the pool wall.

Thirdly, Circulating Water Treatment Process

1. The circulating water treatment process involves a water treatment room located on the basement floor at an elevation of -4.08, with a net height of 4.1m. The circulation purification return water pipe of each pool flows into the balance pool by gravity (with a drop greater than 0.6m). The Sanhe circulating water pump draws water from the pool and sends it to the ozone mixer after pressurisation. The mixed water passes through the ozone reactor (2100mmx3600mm), multi-media filter tank (zeolite, activated carbon, quartz sand; 2100mmX: 3600mm), and is connected to the ozone eliminator. After passing through the steam-water heat exchanger, the circulating water supply pipe leads to each pool. A hair concentrator is installed on the suction port of the circulating water pump, a flocculant dosing system is installed before the ozone mixer, and a pH adjustment and long-lasting disinfection system is installed at the outlet of the circulating water supply pipe in the machine room. The end of the circulating water pipe is equipped with a residual chlorine automatic monitoring device, and when the pump stops, it prevents the pool water from returning to the balance pool control valve. The heat exchanger is equipped with a temperature automatic adjustment device.

This regulation is based on the requirements of the China Engineering Construction Standardization Association (2000) Jian Biao Xie Zi No. 36 “Notice on Printing and Distributing the Second Batch of Recommended Standards System and Amendment Plan of China Engineering Construction Standardization Association in 2000”. The research institute and related units jointly revised the original “Code for Design of Swimming Pool Water Supply and Drainage” CECS14:89. During the revision process, the team conducted investigations and studies, carefully summarised experiences since the implementation of the original specification, absorbed mature new technologies, equipment, and materials, and drew on standards from Germany, the United Kingdom, and the United States. They also extensively solicited opinions from relevant units and experts.

This Regulation is Divided into 17 Chapters. The Main Contents of the Revision Are as Follows:

1. The regulations were renamed “Swimming Pool and Water Play Pool Water Supply and Drainage Design Regulations”, expanding the scope of application.

2. New terms and symbols, pool design, water quality monitoring and system control, management and maintenance, etc., were added in five chapters.

3. Water quality and sanitation standards for world-class and national-level competition swimming pools were added.

4. Several design parameters were revised and supplemented.

5. Regulations for water amusement pools were added.

6. Outdated provisions and those prone to misunderstanding were deleted.

7. Based on foreign standards, materials, and domestic engineering practice summaries, relevant provisions were supplemented and improved.

Filter Sand Tank – Application Range:

● Water filtration for swimming pools, water parks, and massage pools

● Sea water, freshwater aquaculture, aquarium engineering

● Industrial water purification, landscape water treatment

● Drinking water pretreatment

● Agricultural irrigation

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