porous concrete pipe
31Molokai — • Information about this Hawaiian island and the leper colony there Catholic Encyclopedia. Kevin Knight. 2006. Molokai Molokai † …
32Oxy-fuel welding and cutting — Oxyacetylene redirects here. For the song, see Cubanate. Side of metal, cut by oxygen propane cutting torch …
33Turf management — or pitchcare describes the work needed to keep a sporting pitch ready for use. This article looks at the various types of sporting pitches and the type of challenges which they present.The skills needed vary considerably dependent upon the sport… …
34Water pollution — Raw sewage and industrial waste flows across international borders New River passes from Mexicali to Calexico, California. Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans and groundwater). Water p …
35Marvel Cave — The Marvel Cave Cathedral Room Location Stone County, Missouri, USA …
36tile — tilelike, adj. /tuyl/, n., v., tiled, tiling. n. 1. a thin slab or bent piece of baked clay, sometimes painted or glazed, used for various purposes, as to form one of the units of a roof covering, floor, or revetment. 2. any of various similar… …
37Weeping tile — A weeping tile is a porous pipe used for underground drainage. The pipe is typically plastic with small slits cut lengthwise into it. It is buried and surrounded by aggregate larger than the slits. The aggregate rocks prevent excessive soil from… …
38Daylighting (streams) — Here Marin Creek has been daylighted. For the use of natural light in indoor illumination, see Daylighting. For a similar operation with transportation tunnels, see Daylighting (tunnels). In urban design and urban planning, daylighting is the… …
39Trickling filter — A trickling filter consists of a fixed bed of rocks, gravel, slag, polyurethane foam, sphagnum peat moss, or plastic media over which sewage or other wastewater flows downward and causes a layer or film of microbial slime to grow, covering the… …
40Soil mechanics — is a discipline that applies principles of engineering mechanics, e.g. kinematics, dynamics, fluid mechanics, and mechanics of material, to predict the mechanical behavior of soils. Together with Rock mechanics, it is the basis for solving many… …
