I always say this, because it’s the natural world’s model.
Modeling design on how water moves with gravity pays off with successful landscapes.
Xeric plants are on top where the sandy loam grains sharply, but in the basin which floods briefly and the soil stays moist longer. It’s similar to a broad arroyo in the general hydrology.
There, I used mesic Celtis reticulata and Prosopis pubescens plus seeding.
On that high area, there are some volunteers of the very xeric, sandy soil specialist Psorothamnus scoparius.
This basin or ponding area isn’t the most aesthetic part of my design or the overall development, but it’s required so excessive runoff from development can safely exit properties. Usually such areas are fenced in with chain link, inside only bare dirt kept free of plants or covered in rock kept free of plants.
Here, arroyo plants absorb that extra water and provide habitat for wildlife. More attractive and productive than barbed wire, chain link and rock.
Another view of the basin below.
8/13/17 weather: 89 / 68 / T