Flat-bottomed sunken courtyard design

Quick answer：

Flat-bottomed sunken courtyard design refers to a landscaping technique where a courtyard is sunken below the level of the surrounding ground. This design creates a distinct outdoor space with a lower elevation, often used in modern residential and commercial architecture to enhance privacy, create a serene atmosphere, and incorporate natural elements like water features or gardens. The design requires careful planning to ensure proper drainage and to avoid issues like flooding.