Search results
Results from the WOW.Com Content Network
A diagram of a traditional French drain. A French drain [1] (also known by other names including trench drain, blind drain, [1] rubble drain, [1] and rock drain [1]) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area.
Storm drain grate on a street in Warsaw, Poland Storm drain with its pipe visible beneath it due to construction work. A storm drain, storm sewer (United Kingdom, U.S. and Canada), highway drain, [1] surface water drain/sewer (United Kingdom), or stormwater drain (Australia and New Zealand) is infrastructure designed to drain excess rain and ground water from impervious surfaces such as paved ...
Saint Marcellus' flood a storm tide is also called the "Second St. Marcellus flood".; St. Mary Magdalene's flood occurred on and around the feast day of St. Mary Magdalene, 25 July; the passage of a Genoa low the rivers Rhine, Moselle, Main, Danube, Weser, Werra, Unstrut, Elbe, Vltava and their tributaries inundated large areas.
Subsurface drains, on the other hand, are designed to manage water that seeps into the soil beneath the planting surface. French drains, which are gravel-filled trenches with perforated pipes at the bottom, are the most common type of subsurface drain. Trench drains, which are similar but shallower and wider, are also used in some situations. [4]
Mississippi River at Kaskaskia, Illinois, during the Great Flood of 1993. A 100-year flood is a flood event that has on average a 1 in 100 chance (1% probability) of being equaled or exceeded in any given year.
Percolation Trench. A percolation trench, also called an infiltration trench, is a type of best management practice (BMP) that is used to manage stormwater runoff, prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay.
Sewers under the city in 2005. The sewers of Paris date back to the year 1370 when the first underground system was constructed under Rue Montmartre.Consecutive French governments enlarged the system to cover the city's population, including expansions under Louis XIV and Napoleon III, and modernisation programs in the 1990s under Mayor Jacques Chirac.
In case of an advancing enemy army, the area was to be inundated with about 30 cm (1 ft) of water, too shallow for boats but deep enough to make advance on foot difficult by hiding underwater obstacles such as canals, ditches, and purpose-built traps.