Posted Mon, 02 May 2011 02:33:00 GMT by yohannes
Hi everone,
Currently, I am calibrating a seepage face and flow rate towards a
quarry site using cross sectional model (2D) - SEEP /W model. the model has been
calibrated well against the measured flow rate and groundwater level
from three observation bores along the section. I wonder if the ratio
Kv/Kh ~ 500 is realistic. The aquifer is sandy gravel overain by sandy
I would like to justify this ratio and see if there are case studies,
documents relevant to  the ratio of hydraulic conductivity ( vertical
vesus horizontal).
Could this be a none- uniqueness problem with model calibration.

Melbourne, Australia
Posted Mon, 06 Jun 2011 14:21:00 GMT by Gianmarco Dio Egr. ing.
Hy Johannes
sorry but I think your ratio more than unrealistic, is actually impossible in plain - parallel layered sedimentary deposits.
Are those deposits strongly cemented and vertically fractured ? If that is not your case, check your boundary conditions or if a 2D vertical modelling is really suitable.
Posted Mon, 12 Sep 2011 21:52:00 GMT by Jose Pedro Rebes Lima
Hi Yohannes,

Have you some marly layers ? Or is all sand and gravel? Anyway even if you have marls, I agree with Gianmarc that 500 is a lot, base on what I read the ratio is more about 50-100. Perhaps could you increase your recharge?


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