The ultimate drawdown in a well measured at the designed rate Q of continuous pumping for a given period is different from the theoretical drawdown due to well losses. The total drawdown sw is made up of: (i) Head loss resulting from laminar flow in the formation (formation loss), (ii) Head loss resulting from the […]
How to Measure Well Losses? | Geography
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How to Determine the Probable Yield of Wells? | Geography
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The following tests may be performed to get an idea of the probable yield of the well: 1. Pumping Test: The water level is depressed to an amount equal to the safe working head for the subsoil. Then the water level is kept constant by making the pumping rate equal to the percolation into the […]
How to Construct Infiltration Gallery? (With Diagram) | Wells | Geography
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The following article will guide you about how to construct infiltration gallery with the help of suitable diagrams. Infiltration gallery is a horizontal perforated or porous pipe which opens joints, surrounded by a gravel filter envelope laid in a permeable aquifer with a high water table and a continuous recharge with a perennial flow. Infiltration […]