SkipVought - No preference on the arrangement of the existing table. The setup was pulled from existing manuals. My intent is to take the newly arranged data set and export that information into a SWMM model for a watershed analysis. In attempting this, I realized that I couldn't figure out...
I'm trying to force/rearrange the data set into a hyetograph for rainfall data (time vs. precipitation depth). While not a true bell curve, the shape is still a bell curve shape. I've attached the spreadsheet and the column I'd like to rearrange is Column N (tab "Hyetograph"). I've manually...
I've got rainfall data (Time in inches and precipitation depth) in two separate columns in excel and I'm attempting to rearrange the data in one of the columns. Let's say I have a data range of 1 (Cell A1) to 100 (Cell A100). In the new column, I'd like to have the numbers rearranged where the...
Would designing the riprap for each individual pipe be the solution? The discharge pipes are 12' apart from center line to center line which would put a gap of roughly 6' from outside of pipe to outside of pipe. Is this enough of a gap to handle each pipe independent from another or would the...
I'm designing the riprap apron (and rock diameter size) for (4) four force main pipes that are discharging into a channel. The four pipes are spaced 1 ft. apart. Each individual pipe is 6 ft. in diameter with a flow (Q) of approximately 210 cfs. I'm using the HEC 14 publication, specifically...
I understand that I've asked a very broad question, but I'm not too familiar with it. Being in design, I'm more in tune with the typical "get funding, assemble project team, develop preliminary design, etc.", and then see the project from start to finish which could last months if not years...
Is anyone familiar with shutdown/turnaround project engineering/management? This is more in reference to the petrochemical field and the type of work involved with this job as it pertains to the plants, refineries, and offshore platforms. Does anyone have any experience, good or bad, that they...
Gulf Coast (South Louisiana)
Salary (bonuses are rare)
40-50 hrs per week (I've hit 60 a few times)
Any hours after 40 are paid as straight time (not time and a half)
I'm currently using the 2011 version. If your familiar with EPA SWMM then it should be breeze since it uses the same engine with an updated GUI. Although even if your not familiar with it, it shouldn't be too hard to hit the ground running with it. Autodesk is fairly good with workflows...
I haven't had a chance to really "dig" into your spreadsheet but it seems that you are mixing the SCS method and the rational method in order to generate a hydrograph. Basically the SCS method (which is now called the NRCS) is used in order to determine a runoff volume. Again, the rational...
I agree with cvg. The rational method was not intended for use with forming hydrographs, only with giving a peak discharge (Q). However, a lot of software programs will generate a hydrograph for whatever method is used. This can turn into the whole "garbage in, garbage out" conflict and...
Intuitively, this doesn't sound right. Without having any other information (routing or redirecting of post development runoff), it would seem that going from a wooded area (pervious) to a C&G which I assume is concrete and gravel (impervious), the times to peak would increase. However, you...
I work at a consulting firm that will sometimes require its engineers to go offshore, but that is only for a day or two. As far as the any of the oil companies, I'm not sure. I have a few friends that work for both Exxon and Shell and they tend to "follow the projects". With land based...
What area are you working in? It would seem the area and the type of work dictates what the market will bear for an EIT or PE. I work in the New Orleans area and EIT's coming out of college can expect anywhere from 50k to 65k to start (structural) depending on if you go to work for a...
To answer one of your questions ("How do I size my pipe..."), you can use Manning's equation as shown below:
Q = 1.486/n x A x R^(2/3) x S^(1/2)
where Q = discharge
n = Manning's coefficient
A = cross-sectional area of flow
R = hydraulic radius (divide A by wetted perimeter...
I've just received the geotechnical report and the geotech has given several options:
1. Constructing the berm out of suitable clay material (PI < 40).
2. Lime treatment of existing clay material to lower PI.
3. Synthetic liner.
4. Sheetpile installed through the berm section.
Per my...
cvg/Ron,
My 10' crown width is acceptable for smaller trucks, but I guess I'll have to just compare the dimensions (as noted by Ron) to see what the clearances are. I'm waiting to hear back from the client to confirm if any "lowboy" trailers are being used. The biggest issue with widening the...
I'm drawing a blank and hoping someone could guide me in the right direction. I'm designing the grading and drainage for a certain area that has a containment berm surrounding the entire site. The berm in approximately 4' high from natural grade with 3:1 side slopes and a 4' wide crown. The...
Thanks DairyDesigner.
The geotech is running the permeability tests right now so once I get those results (coupled with environmental boys allowance for detainment time within the berm should a spill happen) it will help in determining if a clay liner or clay cutoff trench is the best solution...
