The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Undersökning av slugtestmetodik

På svenska

Author

  • Klara Andersson

Summary, in English

Hydraulic analysis plays a crucial role in urban planning, prospecting and environmetal assess-ments. Slug test is an aquifer test often used by hydrogeologist and engineers to determine the hydraulic conduct-ivity. In this bachelor thesis I discuss aquifers with small diameter piezometers where some of the them are screened across the water table. The essay is conducted in cooperation with the sustainability consulting services Sweco. The slug test was performed in Lomma, in south-west of Scania and thereafter estimated by the Hvorslev and Bouwer & Rice methods which can be used for both confined and unconfined aquifers. A volume of water is rapidly drawn from or added to the monitoring well. The rate at which the water level falls or rises is measured and thereafter analysed by a proper method. You can also use a solid slug that is equivalent to adding a volume of water. The benefit with the solid slug is that no direct contact with water is needed if the aquifer is contaminated. A slug test has low installation costs and requires less personnel time if compared to other aquifer tests. A series of slug tests can be performed in a couple of hours in already existing wells. A disadvantage is that the resulting va-lues are often only representative of a smaller part of the aquifer. The field experiment conducted within this thesis demonstrated that the most useful method when the well was screened across the water table was to use a solid slug and create a drawdown. When the piezometer is installed under normal conditions the typically slug test can be performed with an injection of water, and the rate at which the water level falls is measured. The results of the study show that it is important for the hydrogeologist to have knowledge about the geology and the piezometer in-stallation before performing the slug test.

Publishing year

2015

Language

Swedish

Publication/Series

Examensarbeten i geologi vid Lunds universitet

Document type

Student publication for Bachelor's degree

Topic

  • Earth and Environmental Sciences

Keywords

  • geologi
  • slugtest
  • bailertest
  • hydraulisk konduktivitet
  • hydrauliska egenskaper

Report number

451

Supervisor

  • Dan Hammarlund (Professor)