The siphon drainage collection system is designed with the principles of cost-effective investment, low operational expenses, and minimal land occupation.

Select appropriate specifications of long-lasting drainage boards, water storage tanks, etc., based on requirements such as the amount of water seepage and irrigation from the underground parking garage roof, the thickness of the soil cover, the spacing of drainage channels, and the volume of the water storage tank.

The drainage layer materials must comply with the relevant provisions of the "Technical Code for Greenhouse Roof Engineering" JGJ155. In areas where the annual rainfall is less than the evaporation rate, the drainage layer should be set in sections in combination with drainage channels.

4 The siphon drainage collection system involves concealed underground installation and rainwater collection and reuse, with all system materials not generating pollution or secondary pollution sources to contaminate the environment.

The siphon drainage collection system equipment should operate stably and reliably, be easy to maintain, and convenient to operate.