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  2. Impervious surface - Wikipedia

    en.wikipedia.org/wiki/Impervious_surface

    Impervious surface percentage in various cities The percentage imperviousness, commonly referred to as PIMP in calculations, is an important factor when considering drainage of water. It is calculated by measuring the percentage of a catchment area which is made up of impervious surfaces such as roads, roofs and other paved surfaces.

  3. Hindustani grammar - Wikipedia

    en.wikipedia.org/wiki/Hindustani_grammar

    Compound verbs, a highly visible feature of Hindi–Urdu grammar, consist of a verbal stem plus a light verb. The light verb (also called "subsidiary", "explicator verb", and "vector" [ 55 ] ) loses its own independent meaning and instead "lends a certain shade of meaning" [ 56 ] to the main or stem verb, which "comprises the lexical core of ...

  4. Surface runoff - Wikipedia

    en.wikipedia.org/wiki/Surface_runoff

    Surface runoff often occurs because impervious areas (such as roofs and pavement) do not allow water to soak into the ground. Furthermore, runoff can occur either through natural or human-made processes. [1] Surface runoff is a major component of the water cycle. It is the primary agent of soil erosion by water.

  5. Urban runoff - Wikipedia

    en.wikipedia.org/wiki/Urban_runoff

    Flooded streets in New Orleans Relationship between impervious surfaces and surface runoff Urban runoff is a major cause of urban flooding , the inundation of land or property in a built-up environment caused by rainfall overwhelming the capacity of drainage systems , such as storm sewers . [ 12 ]

  6. Hindustani verbs - Wikipedia

    en.wikipedia.org/wiki/Hindustani_verbs

    Compound verbs, a highly visible feature of Hindustani grammar, consist of a verbal stem plus a light verb. The light verb (also called "subsidiary", "explicator verb", and "vector" [ 20 ] ) loses its own independent meaning and instead "lends a certain shade of meaning" [ 21 ] to the main or stem verb, which "comprises the lexical core of the ...

  7. Permeable paving - Wikipedia

    en.wikipedia.org/wiki/Permeable_paving

    In addition to reducing surface runoff, permeable paving systems can trap suspended solids, thereby filtering pollutants from stormwater. [ 2 ] Permeable pavement is commonly used on roads, paths and parking lots subject to light vehicular traffic, such as cycle-paths , service or emergency access lanes, road and airport shoulders, and ...

  8. Antecedent moisture - Wikipedia

    en.wikipedia.org/wiki/Antecedent_moisture

    Surface runoff in hydrologic systems is generally conceptualized as occurring from pervious and impervious areas. It is the pervious runoff that is affected by antecedent moisture conditions, as runoff from impervious surfaces such as roads, sidewalks, and roofs will not be significantly affected by preceding moisture levels. Pervious surfaces ...

  9. Imperfective aspect - Wikipedia

    en.wikipedia.org/wiki/Imperfective_aspect

    Periphrastic Hindi-Urdu verb forms (participle verb forms) consist of two elements, the first of these two elements is the aspect marker and the second element (the copula) is the common tense-mood marker. [1] There are two independent imperfective aspects in Hindi-Urdu: Habitual Aspect, and Progressive Aspect.