Hello,
I am working on an arsenic removal project from wells. The water is fairly clean but with 0.05 mg/L of arsenic. I found adsorption and ion-exchange resin are the most commonly used technologies. Does anyone have any recommendations?
S
Hello all,
I am trying to get a volume of 12.5% sodium hypo based on different diluted solutions (as shown below). The 12.5% volume (gallons) needed was calculated based on the dilution (%) times diluted volume (gallons) divided by 12.5%. My question is, why the 12.5% volume needed are the...
Hello,
I am trying to model a runoff drain to a swale. The swale is inside the drainage area.
In the HydroCAD model, I have one subcatchment going to a reach(open channel), but the TC in the subcatchment area includes the swale that is going to be discharged to. I was wondering if I should...
Hello,
The Hazen–Williams equation related problems and answers look incorrect to me. It is using the SI unit equation to solve the problem while all the calculation plugged in the equation has US units. I was wondering if anyone else noticed this???
Thanks,
Serene
Hello,
I was wondering how does HydroCAD recognize if I am modeling a bioretention pond or a regular detention pond? I understand that for the bioretention we can add exfiltration and underdrain (pipe). But is it possible that the inflow is very little that nothing is coming out (outflow = 0...
Hello,
I was wondering what method I should use when Tc line is going to a dry swale? There is an underdrain pipe, but I don't think it is proper to select the "pipe channel" method because the grass cover on top would provide some detention.
Thank you for your time.
Best,
Serene
Hello,
I was directing the runoff from two drainage areas to one detention pond, but the inlet flow at the pond doesn't equal to the sum of the runoff from the two areas. Could you please help me to understand what is wrong?
Thanks,
Serene
I was trying to adjust the parameters (i.e. elevation, dimension, length, etc.) for outlet culverts, orifices, and weirs to achieve the desired flows at three rainfall events (i.e. 1-yr, 10-yr, and 100-yr). However, it is very difficult to adjust the parameters manually to meet one rainfall...
