@article{McMahon2019, author = "Glenda McMahon and Ken Chatterton", title = "{Infiltration trench filled with sand and gravel}", year = "2019", month = "5", url = "https://repository.lboro.ac.uk/articles/figure/Infiltration_trench_filled_with_sand_and_gravel/7873922", doi = "10.17028/rd.lboro.7873922.v1" }