If you make a reservoir on the site, then you will definitely face the question of strengthening the coast. It can resort to the help of gabions (volumetric mesh structures), but today retaining walls are increasingly used in landscape design, which not only strengthen the banks of reservoirs and slopes, but also decorate the territory.
Retaining walls are essentially structures filled with stones. They are inexpensive, easy to build and durable. If there is no current in your reservoir, then you can use geogrids filled with crushed stone. It is best to use larch wooden retaining walls, which can last up to fifty years.
Retaining walls are also used to preserve the slopes of the terrain. They will push the boundaries and show different levels of slope. If you put retaining walls for these purposes, then take into account the mass of the slopes of the relief and its possible increase due to precipitation. Typically, such structures have special drainage systems.
As mentioned, retaining walls are durable, easy to install and inexpensive. They can also be disguised by arranging a ladder, bench or fountain. In order for the structure to withstand heavy loads and soil pressure, their construction is preceded by the arrangement of a foundation made of wood, concrete, brick or other material suitable for your garden plot.