Drawdown groundwater meaning1/23/2024 ![]() This complication makes the absolute value of specific capacity of little use though it is useful for comparing the efficiency of the same well through time (e.g., to see if the well requires rehabilitation). Due to non-linear well losses the specific capacity will decrease with higher pumping rates. The specific capacity of a well is also a function of the pumping rate it is determined at. S = B Q + C Q 2 is the drawdown ( m or ft) The components of observed drawdown in a pumping well were first described by Jacob (1947), and the test was refined independently by Hantush (1964) and Bierschenk (1963) as consisting of two related components, Typically, drawdown also increases with the length of time that the pumping continues. The amount of water that can be pumped is limited by the drawdown produced. When water is pumped from a well the water level in the well falls. Well testing differs from aquifer testing in that the behaviour of the well is primarily of concern in the former, while the characteristics of the aquifer (the geological formation or unit that supplies water to the well) are quantified in the latter. More specifically, a well test will allow prediction of the maximum rate at which water can be pumped from a well, and the distance that the water level in the well will fall for a given pumping rate and duration of pumping. ![]() In hydrology, a well test is conducted to evaluate the amount of water that can be pumped from a particular water well. For the performance testing of oil wells, see well test (oil and gas). This article is about the water well test. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |