Listen to the old people in the village. There is an ancient saying: "Shan Zhinan, the north of the river is Yang, the north of the mountain is Yin, and the south of the river is Yin". In the past, houses in rural areas were basically facing south, so there was a relationship between yin and yang in the position of water. The ditch in front of the house is generally a diversion of water from South to North, so it is called "Yanggou". Speaking of the use of drainage ditches, these old people say that drainage is one of the most important uses.
In the past, many houses in rural areas were built by mountains, so water might flow down from the mountains in rainy days. If there is no drainage ditch, water will flow everywhere, and it is likely to flow into the house, affecting the stability and safety of the house. The second is that the previous houses were all made of tiles, and the eaves would drip when it rained. Especially when it rains heavily, the water on the eaves will flow down directly. Build some open ditches so that the rainwater dripping from the eaves can just enter the open ditches. This is not only conducive to the rapid discharge of water, but also has the advantage of avoiding water splashing on the wall. After all, houses in the past were either earthen walls or wooden houses. If the wall is wet for a long time, the service life of the house will be greatly shortened.
In the past, there were many stresses on building houses in rural areas, some of which were ignored, but there were still practices of leaving open ditches around houses. Now more attention is paid to aesthetics and practicality. After the open ditches are dug, some will be made of concrete or even tiles. In front of the house, it will be covered for easy access. In your hometown, will someone dig "open ditches" around the house?