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I am filling out an Army Corps of Engineers application that asks for the "duration of inundation". I know that this is defined as the amount of time it takes for the water surface elevation to return to it's starting elevation, however what order of accuracy should I be using? EXAMPLE, 24 hour...

MattZ99, I actually had come to the same conclusion of your first suggestion shortly before you posted. My final solution was to add another small reach out of my downstream storage area with the rating curve of the dam. Success! Thank you for your valuable post.

I have a very simplistic model which would be easy to model in PondPack unfortunately the state agency reviewing the model will not accept PondPack and requests that the hydraulic model be done using HEC-RAS to provide water surface elevations due to the existing and proposed culverts. There...

This isn't really going to help you if you need m(dot) but just as an FYI. MathCAD does support the Unicode commands accessible by using the [Alt] button and the number pad. You can find the codes by going to your computer Character Map (do a search for CharMap on your harddrive). For example...

I was flipping through a set of bridge replacement plans and there is a detail entitled "Florida Diaper on Post". This is the only reference to the item in the plans as far as I can see. My curiosity took over and so I have searched the internet but have not found anything else by this name...

I have an existing dam outlet that in plan is two broadcrested weirs that are 90 degrees to one another. The longer broadcrested weir (~14') is located perpindicular to the flow and the shorter broadcrested weir (~10') is located parallel to the flow. I know the design flows over the spillway...

I am currently reviewing some plans which propose the use of a 1" wide weir as the outlet structure of a detention pond in order to regulate peak flows to below pre-development conditions. Conceptually the thought of a 1" wide weir does not seem feasible. The equation being used is...

Exactly what I was looking for. Thank you for the speedy reply. -KD

Is there any way to turn off or hide the boundary line created when an image (raster) is clipped? I do not want the edge of image to show when printed. Thank you. -KD

Answer 1 Nothing is wrong with daylighting the foundations into the wetland buffer. Except that the plan had already been accepted by the Wetland Commission with a note saying that if the final footing drain design daylights in the wetland buffer the application would have to go back in front of...

rd78- Thank you. I knew it was something simple. -KD

I am having a very difficult time with a very simple problem. I have an array, RoadWidth[n (where n= 1..48). I want to add a constant to each of the values in the array. In my head this can be accomplished with a simple for loop but I just can't get it to work. for n = 1..48...

cvg- Thank you for your response. As I was looking over the plans more carefully I realized that many of the units that connect to the catch basins do in fact fall under examples C and D which is why the designer did not see the need to do an HGL analysis since he already knows that they will...

Option 1 should additionally read: Use a sump pump to daylight the pipe outside of the wetland buffer. -Kati

Hello to All- I am currently reviewing a subdivision plan with 173 housing units, which is in close proximity to wetlands. In order to prevent the footing drains from daylighting in the protected wetland buffer, the designer has opted to do two different options...

It is probably easier to explain how to recreate my problem... Merge a cell to the cell below it. Now merge the cell below the merged cell to the cell below it. Make one more merged cell. Now put text in each one like this "excel", "hates", "me".Now click on a different cell somewhere else on...

If the dates are in C$8:C$17 abd the numbers you want summed are in D$8:D$17... B20=1/1/2003 B21=1/1/2004 The following will be the sum of all products in 2003 (print in cell C20 and you can copy the formula and the years down to equal each of the years, you can format column B to show just...

I just took the PondPack seminar offered by Haested and this precise question was raised. Unfortunately a colleague borrowed my manual and the so I do not have the precise answer for you but if I remember correctly... You are going to enter an orifice and a weir structure into the outlet...

Have you tried looking at excel's VLOOKUP command? You just have to make a table with the values you want associated with each pipe diameter. There are a ton of examples of using VLOOKUP out on the internet or in the help files. -KLD

I think you want something like this... m:= C if mod (A,B)=0 D otherwise