I've got to put curve tables into a MicroStation file for the DOT. They need to be in a specific format. None of the stylesheets that come with InRoads out-of-box quite have what I need. They are close, and probably just need a small amount of editing. I have had limited success, but I...
Here's the issue: Our surveyors, and most I've worked with, bring back survey for curbs by giving two lines: one represents the gutter line, one represents the back of curb. Assuming the front of curb is the same elevation as the back of curb, I always have to generate another offset feature...
There is a publication called Storm Surge Analysis by USACE numbered EM 1110-2-1412. There is no listing for it on the USACE website. Does anyone know where else it may be?
There is also a Users Manual by Lyle Zevenbergen and Ayers Associates for the Tidal Hydraulic Modeling for Bridges...
I have a situation where the 10-year flow just begins to overtop the roadway. There is a roadway sag on the right side of the bridge with a lowest low point (BU and BD low point) at 11.69. Computed water surface just downstream of bridge (section 2) is 11.67.
HECRAS is telling me that my...
I have a bridge to model in HEC RAS that has a bend in it. Apparently, the road had been widened years ago and the added portion of the bridge had to be put on a slant to avoid conflicts. So the result is a bridge that is perpendicular to the roadway up to the median, then the rest has a...
I have a meandering stream in superflood (the 100-year storm). My colleague and I can't seem to agree about the location of some of the bank stations. I want them at the obvious steep-to-flatter slope change on the cross-section, but my colleague likes to move banks stations to make the...
Has anyone heard of a method of cubatures used for estimating flow in a tidal stream?
A gage upstream of head of tide and the tidal fluctuations downstream of your project site are combined with storage in the reach to come up with some discharge value. That is all I can find out from google -...
Does anyone have any ideas about how to estimate flow in a tidally-affected stream? I have topography and land use info and can estimate the fluvial flow using TR-55, but there is a tidal influence present. If I consult the NOAA site, I can get tidal predictions and elevations for a gaging...
Does anyone know the best way to obtain a map file to be used in HMS? I know they're not necessary for the computations, but I'd like to impress the client and my supervisor with the added touch. I think it'll take .shp, .map, .dlg, .img, or.dxf. The area is in Hunterdon and Somerset...
Has anyone seen a curve number table that assigns curve numbers to speciic land use categories? I've googled it, but only found the basic TR-55 list that says for example
A B C D
Woods 36 60 73 79 for fair coverage.
but what I need is...
When establishing a relationship between outflow and elevation, it is easy to see which equations to use for culverts or bridges flowing full or overtopping the roadway. What is the best way to calculate outflow from a bridge in low flow conditions? Would that be considered weir flow? or open...
I know how to import cross sections from Inroads to Hec Ras. Now, suppose I interpolate in HEC RAS, I can export that info to a sdf file. Then, how do I get info to show up on Microstation and/or Inroads as a new cross section? In other words, what do I do with the .sdf file?
Does anyone know for sure how the program creates the two internal bridge sections? I know it copies them from upstream and downstream, but where are the actual "cut lines" located with respect to the stream centerline? And how are they oriented? Notice how if the two upstream and downstream...
When doing a reservoir routing with Hec Hms, I need a storage-elevation-flow table. I got my stage-flow relationship from my (already modeled) Hec Ras Stage rating curve at the station at the upstream face of the bridge. Is this correct? At each height, I can see a corresponding flow. Can't...
I need help! I'm doing a bridge replacement analysis. I'm familiar with HEC-HMS, but not a whole lot. I need to know where I enter the information I have. I've got design storms. I have geometry. I know storage upstream of the bridge at each elevation. Do I use river reach routing? Or...
What can anyone tell me about design criteria for culvert replacement when the flow is tidal? The PM says we don't need a HEC RAS run for water surface elevations, but I need velocities to give to another department for scour calculations. Also, I need to reset/resize these culverts to...
I am using HEC HMS to do river reach routing. I have an existing bridge and several proposed models as well. I am trying to compare the existing outflow at 100 year storm (and others) to the proposed outflow at the 100 year storm. I am using Modified Puls routing. I am trying to find out if...
