Recent content by Rookie2

Thanks Froude! That's exactly what I needed.

Hi, I'm trying to model a water quality / detention pond in HEC-HMS that has two outflow structures draining in different directions. One outlet (riser) drains to a second pond, the other (concrete spillway) discharges to a channel. I was hoping for some advice on how to split the flow in the...

Thanks for your responses. I reinstalled the Microsoft .Net framework and it seems to work fine now. I also downloaded and installed the Windows virtual machine. That's a very helpful tip. Hoping it will save some money on other software upgrades...Thanks Again

Hi, I was just wondering if anyone is using FHWA HY-8 7.2 on a Windows 7 (32 bit) computer. I recently installed Windows 7 and I'm trying to finish a project that I started using HY-8. It seems to work fine until I try to define an irregular roadway section. It gives an error that says "MFC...

Thank you all for your responses. This is very helpful. I guess the USACE would need to answer the question about detention time. I will give HEC-1 and HEC-HMS a try. I've been using an older version of Hydraflow Hydrographs which only allows a fixed tailwater elevation. Again thanks for your...

I am modeling a detention pond. The detention is provided by building a dam on a stream. A large diameter culvert is proposed in the stream bed. This was permitted by the USACE. Two of the conditions of the permit were: 1. The detention time must be less than 2 hours 2. The pipe must be...

CPENG78, Yes that's basically what I'm saying. Also, If you are adjusting the static pressure given by the flow test for the difference in elevation at your connection point, why wouldn't you adjust the residual pressure also? The residual static pressure also varies with elevation and was...

The way I've always modeled the pump and reservoir is by placing the pump at the location of residual hydrant (gauged hydrant)not at the connection point. The reservoir is set at the static elevation given at the residual hydrant-Basically I assume that the residual hydrant is the connection...

Thank you all for the responses. This is very helpful.

Thanks for the response RWF7437, I do plan on using EPANet, I've never used it before but I have used older versions of watercad. That leads me to another question- I've been reading some of the older threads here, and many people recommend modeling the connection to the existing system as a...

Hi, I am working on a residential subdivision where we are tying into an existing waterline that looks something like this- exhyd1 exhyd2 exhyd3 0----------------0---------------0 Our site is adjacent to existing hydrant 2. In order to perform our fire flow calculations...

Hi, I am modeling a proposed residential subdivision for adequate fire flow. I have done this several times before, but the available flow and pressures at the connection to the existing system were based on hydrant flow tests. I then used that data to model the connection as a reservoir and...

The numbers do seem to be reversed but I disagree that that is typical.There is not zero friction loss in the system at the static hydrant (the flow is not zero). The static head is the residual pressure (static head minus friction losses in the system at whatever flow may be occurring in the...

RWF7497, Point taken. Even if I disagreed there is no way I could argue.. Being that your quote is so much more eloquent than mine. Again, My apologies.

Jthompson, your right. The thing I hate about these forums is once you hit the submit button, you can't take it back. Believe me, I tried. My apologies