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  2. SMS (hydrology software) - Wikipedia

    en.wikipedia.org/wiki/SMS_(hydrology_software)

    The software provides tools to automate various basic and advanced delineations, calculations, and modeling processes. [9] It supports river hydraulic and storm drain models, lumped parameter, regression, 2D hydrologic modeling of watersheds, and can be used to model both water quantity and water quality.

  3. Watershed delineation - Wikipedia

    en.wikipedia.org/wiki/Watershed_delineation

    Watershed delineation is the process of identifying the boundary of a watershed, also referred to as a catchment, drainage basin, or river basin.It is an important step in many areas of environmental science, engineering, and management, for example to study flooding, aquatic habitat, or water pollution.

  4. Runoff curve number - Wikipedia

    en.wikipedia.org/wiki/Runoff_curve_number

    The runoff curve number is based on the area's hydrologic soil group, land use, treatment and hydrologic condition.References, such as from USDA [1] indicate the runoff curve numbers for characteristic land cover descriptions and a hydrologic soil group.

  5. Storm Water Management Model - Wikipedia

    en.wikipedia.org/wiki/Storm_Water_Management_Model

    With this form of routing it is possible to represent pressurized flow when a closed conduit becomes full, such that flows can exceed the full normal flow value. Flooding occurs when the water depth at a node exceeds the maximum available depth, and the excess flow is either lost from the system or can pond atop the node and re-enter the ...

  6. Hydrologic unit system (United States) - Wikipedia

    en.wikipedia.org/wiki/Hydrologic_unit_system...

    Each subregion includes the area drained by a river system, a reach of a river and its tributaries in that reach, a closed basin or basins, or a group of streams forming a coastal drainage area. [6] Regions receive a two-digit code. The following levels are designated by the addition of another two digits. [7]

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