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  1. The well is of small size and has negligible storage.
  2. The flow lines are radial.
  3. The aquifer has infinite lateral extent.
  4. Flow is turbulent flow and Darcy’s law is not incorporated in this analysis.
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Option 4 : Flow is turbulent flow and Darcy’s law is not incorporated in this analysis.

Flow is turbulent flow and Darcy’s law is not incorporated in this analysis.

This assumption is wrong because the flow is laminar and Darcy’s law is applicable.

 Assumption of DUPUIT-THIEM THEORY for analysis of groundwater flow towards a well:

  • The velocity of flow is proportional to the tangent of the hydraulic gradient.
  • The file is horizontal and uniform everywhere in the vertical section.
  • The aquifer is homogenous, isotropic, and of infinite aerial extent.
  • The well penetrates and receives water from the entire thickness of the aquifer.
  • The coefficient of transmissibility is constant at all places and at all times.
  • The natural groundwater regime affecting an aquifer remains constant with time.
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