What is the Drainage System of the Great Wall Like?

The drainage system of the Great Wall is a remarkable feat of ancient engineering. Built to withstand the test of time and the elements, it incorporated several ingenious features. Along the top of the wall, there were carefully designed grooves and channels. These directed rainwater away from the walkway and the interior of the wall, preventing waterlogging and potential damage to the structure. At intervals, there were also drainage holes or spouts that allowed the water to flow out from the wall. In some sections, particularly those in mountainous areas, the drainage system was adapted to the terrain. For example, it would make use of natural slopes and gullies to guide the water downhill. The materials used for the drainage components were often the same as those for the wall itself, ensuring durability and a seamless integration with the overall construction. This well - thought - out drainage system was crucial in maintaining the integrity of the Great Wall over the centuries, protecting it from the erosive forces of water and ensuring it remained standing as a testament to ancient Chinese engineering prowess.