Further Remarks About Example 4.5
in CRC Book “Water Environment Modeling”
By Clark C.K. Liu
Example 4.5 in the Chapter 4 of a CRC book “Water Environment Modeling” was prepared to illustrate the derivation and application of a simple detention pond model. The example consists of two parts. The first part presents the CSTR detention pond flow modeling and the second part presents the corresponding detention pond water quality modeling.
In the first part of Example 4.5, the outflow hydrograph from a detention pond was calculated on an Excel spread sheet by using an inflow hydrograph and pond hydraulic property as modeling input (Viessman et al, 2009). The calculated results are shown in Table 4.2, from columns 1 to 7.
In the second part of Example 4.5. the outflow pollutant concentration vs time curve was calculated by using the known inflow water quality conditions and the calculated outflow hydrograph as modeling input. The calculated results are shown in Table 4.2, from columns 8 to 14. The outflow pollutant concentration vs time curve is also called as the outflow pollutograph. The subject of the simple detention pond water quality modeling was not covered by Viessman et al (2009).
It is noted that Table 4.2 in Example 4.5 shows modeling results of both flow and water quality modeling; the information provided by Table 4.1 in Example 4.5 has been included completely by Table 4.2, and thus Table 4.1 should be removed from Example 4.5.
On Sept 21, 2021, we informed CRC of a missed citation in Example 4.5 and made a request to revise the example. However, CRC Press told us “…book went to press Sept. 13, and no further corrections can be made at this point.”
We are sorry for not identifying and citing properly the source of inflow hydrograph data used by Example 4.5. We will make the corrections in the future editions of this book.
A revised Example 4.5 is presented in the following pages.
Copyright © 2022 Clark C.K. Liu