Hydraulic tomography (HT) is a sequential cross-hole hydraulic test followed by inversion of all the data to map the spatial distribution of aquifer hydraulic properties. Specifically, HT involves installation of multiple wells in an aquifer, which are partitioned into several intervals along the depth using packers. A sequential aquifer test at selected intervals is then conducted. During the test, water is injected or withdrawn (i.e. a pressure excitation) at a selected interval in a given well. Pressure responses of the subsurface are then monitored at other intervals at this well and also in other wells. This test produces a set of pressure excitation/response data of the subsurface.
Once a given test has been completed, the pump is moved to another interval and the test is repeated to collect another set of data. The same procedure is then applied to the intervals at other wells. Afterward, the data sets from all tests are processed by a mathematical model to estimate the spatial distribution of hydraulic properties of the aquifer. These pairs of pumping and drawdown data sets at different locations make an inverse problem better posed, because each pair cross-validates the others such that the estimates become less non-unique. In other words, predictions of ground water flow based on the HT estimates will be more accurate and less uncertain than those based on estimates from traditional site-characterization approaches and model calibrations.
hydraulic, tomography, sequential, cross, hole, hydraulic, test, followed, inversion, data, spatial, distribution, aquifer, hydraulic, properties, specifically, involves, installation, multiple, wells, aquifer, which, partitioned, into, several, intervals, alo. Hydraulic tomography HT is a sequential cross hole hydraulic test followed by inversion of all the data to map the spatial distribution of aquifer hydraulic properties Specifically HT involves installation of multiple wells in an aquifer which are partitioned into several intervals along the depth using packers A sequential aquifer test at selected intervals is then conducted During the test water is injected or withdrawn i e a pressure excitation at a selected interval in a given well Pressure responses of the subsurface are then monitored at other intervals at this well and also in other wells This test produces a set of pressure excitation response data of the subsurface Once a given test has been completed the pump is moved to another interval and the test is repeated to collect another set of data The same procedure is then applied to the intervals at other wells Afterward the data sets from all tests are processed by a mathematical model to estimate the spatial distribution of hydraulic properties of the aquifer These pairs of pumping and drawdown data sets at different locations make an inverse problem better posed because each pair cross validates the others such that the estimates become less non unique In other words predictions of ground water flow based on the HT estimates will be more accurate and less uncertain than those based on estimates from traditional site characterization approaches and model calibrations References edithttps web archive org web 20071201142040 http tian hwr arizona edu yeh index html http tian hwr arizona edu research HT examples nbsp This hydrology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Hydraulic tomography amp oldid 1084117028, wikipedia, wiki, book, books, library,
