scene of technology of strengthening the slope of a hill, mountain or ravine using plastic geogrid. photos with an empty and alrea

already aperture background building closeup construction control covered design drainage empty erosion foundation function geogrid geosynthetic geotextile greenery ground hill industrial management material mountain nobody outdoor photo plastic polyester polymer polypropylene prevent protection ravine reinforce retaining roadway safety scene sediment sliding slope soil stabilization stormwater strengthening surface technology using wall