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  2. Drainage equation - Wikipedia

    en.wikipedia.org/wiki/Drainage_equation

    A drainage equation is an equation describing the relation between depth and spacing of parallel subsurface drains, depth of the watertable, depth and hydraulic conductivity of the soils.

  3. Culvert - Wikipedia

    en.wikipedia.org/wiki/Culvert

    Culverts come in many sizes and shapes including round, elliptical, flat-bottomed, open-bottomed, pear-shaped, and box-like constructions. The culvert type and shape selection is based on a number of factors including requirements for hydraulic performance, limitations on upstream water surface elevation, and roadway embankment height. [2]

  4. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    12.1.1 1600s. 12.2 2. 12.2.1 200s. 12.3 3. 12.3.1 300s. ... Print/export Download as PDF; ... FL – Subminiature all-glass elliptical body and flat bases with long, ...

  5. 4 million under winter storm alerts as snow buries Buffalo ...

    www.aol.com/news/york-counties-declare-state...

    More than 4 million people across five states were under winter storm alerts on Sunday as heavy lake-effect snow continued to bury the Great Lakes region, prompting emergency declarations and the ...

  6. Hydraulic diameter - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_diameter

    Using this term, one can calculate many things in the same way as for a round tube. When the cross-section is uniform along the tube or channel length, it is defined as [1] [2] =, where A is the cross-sectional area of the flow, P is the wetted perimeter of the cross-section.

  7. Couple Accused of Faking 6-Year-Old Son's Cancer, Raising ...

    www.aol.com/couple-accused-faking-6-old...

    A couple in Australia have been accused of faking their young son's cancer diagnosis "It will be alleged that the accused shaved their 6-year-old child’s head, eyebrows, placed him in a ...

  8. 19 Easy Low-Carb Dinners for Winter - AOL

    www.aol.com/19-easy-low-carb-dinners-120000400.html

    Cozy up this winter with these easy and delicious dinner recipes. These recipes feature tons of seasonal vegetables like cauliflower, squash, leafy greens and root vegetables, like beets and carrots.

  9. Elliptic surface - Wikipedia

    en.wikipedia.org/wiki/Elliptic_surface

    Explicitly, the lct is 1 for a smooth fiber or type , and it is 1/m for a multiple fiber , 1/2 for , 5/6 for II, 3/4 for III, 2/3 for IV, 1/3 for IV*, 1/4 for III*, and 1/6 for II*. The canonical bundle formula (in Fujita's form) has been generalized by Yujiro Kawamata and others to families of Calabi–Yau varieties of any dimension.