Hello to the group.
I've got a precast rectangular tank that I am trying to analyze. The tanks are cast in two sections, a top and a bottom. The slabs are integrelly cast with the walls, forming essentially a two-way slab with a continuous knee-wall around the perimeter. The tanks range in...
Hi all,
I'm having a senior moment. I can't recall the BestPractice with regards to Tc segments through a subcatchment.
I prefer to model catchbasins, drain manholes and the piping using insignificant-storage ponds.
But... should these pipe segments be included as Tc segments as well?
Or...
Hi everyone,
In HydroCAD, I'd like to model my typical level spreader as a pond with insignificant storage.
My preferred level spreader design incorporates a level "lip" that is usually 10 to 20 feet long, with a height of 1 foot.
My preferred profile is 1:1 on the upstream side, and 4:1 on the...
Hello.
I am putting together a set of specifications for permeable pavement, and a few of the paver-stone manufacturers have suggested which aggregates to use as subbases.
I have seen the following called out:
"ASTM No.8"
"ASTM No.2"
"ASTM No.57"
Which standard would I purchase from either...
Has any one here have a good supplier to purchase a constant head permeameter?
Our state has adopted new rules that allow designers to incorporate the saturated hydraulic conductivity of subsoils to be utilized in infiltration techniques.
Thanks,
Craig
___
Craig T. Bailey, PE...
OK, I've entered into the green world of "L.I.D." Or "Low Impact Development" techniques.
A common "LID" BMP is a "rain garden" or sometimes refered to as a "bio-retention" cell.
My question regarding Hydrocad...
In respect to the bio-retention cell, this facility is designed based on the...
Hello. Hydrocad 8.5 user here.
I recently have submitted a storm water runoff analysis/design to a local reviewing agency.
during their review of my work, a review comment was included, directing me to adjust my analysis.
The comment was: "you must change the flow depth of the channel Tc...
I have been hit upside the head by a State Regulator, saying that they now require all roof runoff to be treated. Just as they require parking lot storm water to be treated, (to remove oil,grit, etc.)
So, I ask the collective:
If a metal roofed building is constructed with gutters that are...
Hi. I know, this topic has been beaten badly, but i still have a question.
I have a simple driveway culvert that I have modeled as a reach, and also as a catchbasin pipe outlet.
The pond outlet model indicates the culvert is undersized, and the flood elevation is breached. (I set the flood...
when i model catchbasins i typically use the "catch basin" type of pond, and model the outlet as the down stream connecting culvert.
How do I "take advantage of the Tc" of the outlet (downstream) culvert as it traverses across my next downstream subatchment?
In other words... I am wondering if...
Hello.
I would like to find information on vehicular traffic loads as they pertain to live load surcharges over an MSE wall which is to be designed.
Which AASHTO manual should I look in?
Specifically, I need to know what surcharge I should design for HEAVY FORKLIFTs. The kind of fork truck...
Hello to all.
I am needing to "size" an effluent pump, one which will be used in a proposed onsite septic absorption field. I intend to specifiy "black poly" or polypropelene pipe/tube for the pressure line.
1. I have calculated the elevation head.
2. I have calculated the friction loss...
Hi to the group.
here's my situation:
I am modeling a treatment swale as a pond, with a broad crested weir as the outlet structure.
The problem: The outlet hydrograph is showing an oscilating flow: zero flow up to several CFS.
I'd like to model the broad crested weir as a "check dam."...
Hi.
Call my crazy, but wasn't exfiltration always modeled in ft/min?
The current exfiltration page is asking for in/hr.
The current HELP function associated with Exfiltration has a few examples of exfiltration rates, but those appear to be the old units of ft/min (could even be ft/hr - I'm...
