Retention Basin Considerations
Retention Basin Considerations
(OP)
I have a retention basin that I would like to construct in a C/D type soil. The depth to water table is shown to be at a range of 12 to 30 inches below grade. The soils info a have also says that the Capacity of the most limiting layer to transmit water is Moderately low to Moderately high (0.06 to 0.20 in/hr). This info is from Web Soil Survey.
I'm being told that in order to put the basin in this type of soil that it needs to have a compacted clay liner with clay that is brought in from offsite. Does this sound correct?
I'm being told that in order to put the basin in this type of soil that it needs to have a compacted clay liner with clay that is brought in from offsite. Does this sound correct?





RE: Retention Basin Considerations
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Retention Basin Considerations
Others encourage local recharge to minimize any off site flow. As such, no clay liner is used.
RE: Retention Basin Considerations
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Retention Basin Considerations
RE: Retention Basin Considerations
f-d
¡papá gordo ain’t no madre flaca!
RE: Retention Basin Considerations
RE: Retention Basin Considerations
RE: Retention Basin Considerations
RE: Retention Basin Considerations
RE: Retention Basin Considerations
This isn't true for all regions of the country. I've been forced to put a clay liner in ponds with high infiltration rate soils because the reviewers thought we got more water quality from wetland plants and reuptake than we would out of raw infiltration. We all probably realize that's dumb, but sometimes it's easier not to argue.
If they're worried about contamination of the groundwater table, absolutely. Or subsurface karst features.
MES11:
If I were you, I would start by doing a water balance calculation to see whether the infiltration through the soil is going to draw the pond down significantly compared to the expected runoff into the pond. You may be able to justify the pond as-is with no additional soil amendments.
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