Various DAMBRK Questions

Dear Ladies and Gentlemen

I am a user of boss DAMBRK. I have some questions:

1. Where do I find a description of the problem specification options 2-6 and 8-10?
2. May you give me some more information of the muskingum-cunge routing of the mudflow?
3. By the "Downstream water surface control" is an opportunity "channel control". What does it mean?
4. What do all this numbers and letters in brackets mean? For example [16-UW], [36-YDN],...

Thank you very much for answering my questions as soon as possible.

Sincerely,

Michael Bätscher
Dipl. Bau-Ing. FH
HSR Hochschule Rapperswil
Abt. Bauingenieurwesen
Oberseestrasse 10
CH-8640 Rapperswil

Tel direkt: +41 55 222 49 77
Fax direkt: +41 55 222 42 66
e-mail: mbaetsch@hsr.ch <mailto:mbaetsch@hsr.ch>
Internet: www.bau.hsr.ch <https://webmail.hsr.ch/exchweb/bin/redir.asp?URL=http://www.bau.hsr.ch/>

Dear Michael Bätscher:

In earlier versions of DAMBRK, you could not perform mixed flow (combined subcritical and supercritical) modeling, and it required that you break your model into individual reaches for subcritical and supercritical flow. These options (2-6 and 8-10) were reserved for this. With DAMBRK's mixed flow option, this is no longer necessary and the options you listed (2-6 and 8-10) are now obsolete.

All of the available information regarding Muskingum-Cunge routing of the mudflow is included in Chapter 6 and the associated references.

The downstream boundary condition "Channel Control" option causes DAMBRK to compute a loop rating curve (hysteresis loop) using Manning's equation with a time variable friction slope.

The brackets at the end of the data entry descriptions refer to the variables in the NWS DAMBRK data file that BOSS DAMBRK's input values map into.

If you have any additional questions or need any further information, please contact me again.

Sincerely,

Chris E. Maeder, M.S., P.E.
Senior Technical Engineer
chris.maeder@bossintl.com