Talk:Hydraulic conductivity

message: No info on dimensions and commonly used units, could be useful, non?  — Preceding unsigned comment added by 91.195.112.2 (talk) 14:23, 1 October 2012 (UTC)
thread_title:  Dimensions? 

message: The Shepherd (1989) reference should be supplemented with a reference to Hazen equations.  —Preceding unsigned comment added by 52.129.8.47 (talk) 21:31, 17 July 2008 (UTC)
replies: text: Upper/lower case "d" for diameter does not matter. I'm not sure if one is more common than the other, but I'll change them to the uppercase "D".+mt 16:16, 9 August 2009 (UTC)
thread_title:  Empirical estimation 

message: There is a typo with regard to the units, it reads "kg m-1 s-1" and it should be "kg m-1s" —Preceding unsigned comment added by 76.5.12.125 (talk) 
:No, not a typo. The former is correct. Check your source again. +mt 03:06, 29 December 2008 (UTC)
thread_title:  Dynamic Viscosity 

message: ===Constant-head method===
It appears you either skipped a step or assumed the reader would know the nomenclature.
Specifically, from the following two lines:
:Q = Avt\, 
Using Darcy's Law, v = Ki\,, 
you jump to this:
yields Q = \frac{AKht}{L}
While it's implicitly obvious (to a reader who can perform algebra), you don't explicitly state that i=\frac{h}{L}.
You also didn't define i\, (hydraulic gradient?) or state that it's dimensionless.
Please consider revising for clarity--QLFixBoy (talk) 16:50, 19 May 2009 (UTC)
replies: text: Accommodated the comments of QLFixBoy and added sections "Resistance" and "Anisotropy". R.J.Oosterbaan (talk) 23:27, 19 May 2009 (UTC)
replies: text: I may be wrong, but doesn't "Q" stand for flow (ex ft3/second) not quantity (ft3)? If so, time should not be included in the formula. Grk1011/Stephen (talk) 13:16, 4 November 2010 (UTC)
replies: text: In literature the symbol Q is generally used for quantity of flow per unit of time (discharge) indeed, but here it is clearly defined as a volume. One could consider to change the symbol Q in this article into V. - R.J.Oosterbaan (talk) 08:16, 6 November 2010 (UTC)
thread_title: Experimental approach

message: It appears you either skipped a step or assumed the reader would know the nomenclature.
Specifically, from the following two lines:
:Q = Avt\, 
Using Darcy's Law, v = Ki\,, 
you jump to this:
yields Q = \frac{AKht}{L}
While it's implicitly obvious (to a reader who can perform algebra), you don't explicitly state that i=\frac{h}{L}.
You also didn't define i\, (hydraulic gradient?) or state that it's dimensionless.
Please consider revising for clarity--QLFixBoy (talk) 16:50, 19 May 2009 (UTC)
replies: text: Accommodated the comments of QLFixBoy and added sections "Resistance" and "Anisotropy". R.J.Oosterbaan (talk) 23:27, 19 May 2009 (UTC)
replies: text: I may be wrong, but doesn't "Q" stand for flow (ex ft3/second) not quantity (ft3)? If so, time should not be included in the formula. Grk1011/Stephen (talk) 13:16, 4 November 2010 (UTC)
replies: text: In literature the symbol Q is generally used for quantity of flow per unit of time (discharge) indeed, but here it is clearly defined as a volume. One could consider to change the symbol Q in this article into V. - R.J.Oosterbaan (talk) 08:16, 6 November 2010 (UTC)
thread_title: Constant-head method

message: There appears to be an error in this table. The conversion factor between cm/sec and ft/day is about 3,000. The values here suggest a factor of 1,000.
I think that the table may have been mis-labeled; and that ft/day should actually be m/day.Davy p (talk) 10:27, 21 May 2011 (UTC)
replies: text: The table is intended to show relative orders of magnitude, not absolute magnitudes. The actual conversion from cm/sec → ft/day is 2.8346457×103, and from cm/sec → m/day is 0.864×103. These both round up/down to 103, but you are correct that m/day is closer by a small margin. I think the intent is to show both SI and imperial units. +mt 23:26, 22 May 2011 (UTC)
thread_title:  Table of saturated hydraulic conductivity values 

message: Changed line Q = Av to Q/t = Av. I'm pretty sure flow velocity is flow rate / area as opposed to flow / area.  — Preceding unsigned comment added by VikiSturmann (talk • contribs) 11:42, 23 July 2012 (UTC)
thread_title:  Hydraulic conductivity