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If you don't have any positive outfall, and the area will hold water for an extended period of time, you may be unintentionally creating a regulated wetland. How much new impervious cover are you providing? It would seem that you are increasing the rate of flow and volume of flow. You might want...

Well, when I go to Program Files --> HydroCAD --> Outlets, there are two folders full of .csv files, titled by what I would assume are the pump manufacturer and pump size. Maybe i am mistaken, but they seem like pump rating curves, as they give a discharge as it relates to head.

I was trying to model a pump outlet today for an existing basin. I am strictly in the hypothetical part of the process, meaning, I am just trying to get a rough idea of how my basin will respond to a pumping rate before I start looking for a suitable pump. I tried to use the pump rating curves...

If you want a "report", you will have to create a style sheet using XML. They provide a sample one on the website, but it is pretty bare. When I use HEC-HMS, I just open the results window, like the Global Summary or a Time Series Table, and hit File --> Print. You end up getting a lot of...

Thanks for the reply. I look forward to the next release. I'm not comfortable with my results when I perform the breach in the manner you describe. I was really trying to avoid using HEC-HMS or an unsteady model in HEC-RAS, but I think I don't have much of a choice.

I have modeled a watershed that drains to a lake. This lake has an earthen dam and a control structure. I am interested in breaching the dam, for inundation study purposes. The model is not very complicated, as the water shed is about 6 square miles. The HydroCAD support site describes the...

Those are all valid fixes that I used with varying success. You can really waste time, though, as a few minutes here and there tend to add up. Plus, its a pain in the you-know-what when you are trying to manage a staff as well as using the software.

Are they concrete beer can holders?

Upgrade to 2011 :) Actually, I think the bug went away in 2010, maybe 2009. I can't remember. But I do remember having that problem, to the point where I forbid the use of the annotative text styles. I'm pretty sure there is no fix for that.

Are you utilizing levees and ineffective flow areas? You could place a levee to the right of the channel, at the highest point before the second crossing of the channel. This would prevent the calculations from using the second channel crossing's section properties in the modeling. It would...

Thanks for all of the responses. I think I knew the answer before I posted, since I use HydroCAD almost daily, but I wanted to see if I had missed something. I figured on having to improvise, I was just hoping to keep everything in the same format for simplicity. It looks like breaking the...

Delaware's Department of Natural Resources & Environmental Control (DNREC) require the design of water quality structures to be able to manage the rate and volume of a 2" NRCS Type II rainfall event, up to a maximum of 1" of runoff. Is it possible for HydroCAD to stop the routing procedure at a...

Could you give an example of when this would be desirable? If you are modeling a subcatchment with both pervious and impervious area, why would you need to separately calculate the runoff generated by each? I'm also having trouble believing that this is even a hydrologically-sound principle...

I like the feature that allows you to report the separate pervious and impervious area. Out of curiosity, I checked the calculate separate pervious/impervious runoff box, to see what would happen. In the two files I tested this on, my peak flows, inflows and outflows all decreased. That...

Well, I figured it out after a few tries. Works like a charm. Mark

Currently our company utilizes AutoCAD R14. A problem that we have is that the wipeout command is not supported by one of our plotters. When you plot a drawing with wipeouts, the plot has rectangles where the wipeout (or text mask) was placed. I have been trying to edit the filter.lsp file to...

Try Simplicity System's Sight Survey software. The CAD portion is mediocre at best, but the Cogo is powerful and allows you to import and export ASCII files. Plus, you can get it for under $500. http://www.simsystems.com mherr78