How do you conduct a slug test?
Types Of Slug Tests
- A rising-head test is initiated by rapidly lowering the water level in the control well and then taking measurements of the rising water level in the well.
- A falling-head test is conducted by rapidly raising the water level in the control well and subsequently measuring the falling water level.
What is an Overdamped slug test?
The water-level response (displacement) from a slug test can be classified as either overdamped or underdamped. Overdamped slug tests typically occur in aquifers of low to moderate hydraulic conductivity (K) and exhibit the type of response depicted in Figure 2.
What is Slug water?
A slug discharge is any discharge including an accidental spill which has the potential to cause interference or pass through of a POTW.
What is a bailer test?
The bailer test needs only simple equipment and can be completed in under 1 h. The test involves removing 20–50 bails from a borehole over a 10-min period and then measuring the recovery.
What are slugs used for?
Slugs are designed for hunting large game, and other uses. The first effective modern shotgun slug was introduced by Wilhelm Brenneke in 1898, and his design remains in use today. Most shotgun slugs are designed to be fired through a cylinder bore, improved cylinder choke, rifled choke tubes, or fully rifled bores.
Why do they call it a slug?
The term slug derives from the days of hot-metal printing, when printers set type by hand in a small form called a stick. Later huge Linotype machines turned molten lead into casts of letters, lines, sentences and paragraphs. A line of lead in both eras was known as a slug.
What is drawdown in pumping test?
Pumping Tests As pumping occurs, groundwater levels decline (drawdown). When the pump is turned off, groundwater levels recover. Drawdown is measured in the pumping well, and also in surrounding monitoring wells, throughout the test period.
What is falling head permeability test?
The falling head permeability test is a common laboratory testing method used to determine the permeability of fine grained soils with intermediate and low permeability such as silts and clays. This testing method can be applied to an undisturbed sample.
What is Lugeon value?
More specifically, the Lugeon test is used to measure the amount of water injected into a segment of the bored hole under a steady pressure; the value (Lugeon value) is defined as the loss of water in litres per minute and per metre borehole at an over-pressure of 1 MPa.
What are overdamped and underdamped slug tests?
The water-level response (displacement) from a slug test can be classified as either overdamped or underdamped. Overdamped slug tests typically occur in aquifers of low to moderate hydraulic conductivity (K) and exhibit the type of response depicted in Figure 2. Figure 2.
What is the slug test method?
Slug test method. The slug of water can either be added to or removed from the well — the only requirement is that it be done as quickly as possible (the interpretation typically assumes instantaneously), then the water level or pressure is monitored. Depending on the properties of the aquifer and the size of the slug,…
How do you measure water level in a slug test?
Water-Level Measurements Water levels may be measured during a slug test by manual techniques or through the use of pressure tranducers connected to automatic data loggers. For most slug tests, especially in high-K aquifers, sensors with data loggers are recommended to obtain sufficiently rapid readings.
What is the best pressure transducer for slug testing?
Pressure transducers with dataloggers are best equipped for slug tests. Pressure transducers are also necessary for closed wells in which water level changes are induced by pressure or vacuum. 3.