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What's the difference between an open drain and a dark drain?

2025-01-12 05:57
2025-01-12 10:24

Open ditches and underground ditches were two types of drainage ditches. Open ditches referred to visible drainage ditches, often used in places such as roadsides and stadiums. Water could flow directly into the ditches from various locations. The cover was usually a comb or grill, which could pass water and intercept debris. A hidden ditch was a ditch that guided water below the ground. It was usually used to lay water pipes, electric wires, and other pipes. The cross-section was larger than an open ditch. The cover was usually steel plate or concrete. Water could not flow directly into it, and the cover could not block it. Open ditches were suitable for excavation and helped to discharge surface water, which was beneficial to the regulation of underground water level and soil moisture. The underground ditch could drain water quickly, occupy a small area and have a small amount of earthworks, which was helpful for field machinery operations.

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