Downward Courtyard Greening Effect Diagram

Quick answer：

A downward courtyard refers to a courtyard that is situated below the level of the surrounding buildings. Greening in this context would involve the design and implementation of vegetation and landscaping features within such a courtyard. An effect diagram typically illustrates what the final outcome or appearance of a design will be. In this case, the diagram would show a conceptual visualization of a green, aesthetically pleasing downward courtyard, possibly featuring plants, garden beds, walkways, and other landscape elements.