Hydraulic Efficiency of Grate and Curb Inlets - Urban Drainage and ...

4 DATA AND OBSERVATIONS
Testing results presented in this report have been collected using the previously described
test procedures and quality control (QC) measures, and are presented at the prototype scale. The
large quantity of data is presented in this section in graphical form, organized by inlet type, and
qualitative observations are made concerning the performance of the Type 13, 16, and R inlets.
Sample tables of on-grade and sump test data are also presented. The entire collected test data
set is presented in tabular form in Appendices B and C, where it is organized by: test ID number,
inlet configuration, slopes, flow depth, total flow, efficiency, top width of flow at the upstream
control section, and top width of flow downstream of the inlets.
4.1 On-grade Tests
A tabular sample of the on-grade test data is presented as Table 4-1. The entire on-grade
data set in included as Appendix B. Inlet efficiency was determined as the ratio of captured flow
to total street flow for each test as shown in Equation 4-1:
captured inlet flow
E =
×100
Equation 4-1
total street flow
where:
E = inlet efficiency (%).
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