uh_ratios_masscurve {iemiscdata}

Table 16-1: Ratios for dimensionless unit hydrograph and mass curve

Description

A table containing the time, discharge, and mass curve ratios.

Usage

uh_ratios_masscurve

Format

A data.table data frame with 33 rows and 3 variables:

Time ratios (t/Tp)

"ratio of the time of DUH coordinate to time to peak of the DUH"

Discharge ratios (q/qp)

"ratio of discharge at a certain time to the peak discharge of the unit hydrograph (UH)"

Mass curve ratios (Qa/Q)

ratio of "accumulated volume at time" to the "total volume"

Source

United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS), National Engineering Handbook, "Part 630 Hydrology Chapter 16 Hydrographs", Pages 16-4, 16-9, 16-15, https://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=17755.wba