Interpreting the Hydraulics of the Campus Borehole Array
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Abstract
There are several boreholes in the campus of the University of Birmingham,
however, the project’s interest will be in 8 boreholes. These boreholes are divided
into two groups, Museum boreholes array with 5 boreholes and Great Hall boreholes
array with 3 boreholes. The project aims to use the provided data to examine the
hydraulic properties in the site. The report investigates a number of subjects that will
be beneficial to reach the project’s aim; and they are; geophysical log interpretation,
pumping test interpretation, packer test interpretation, slug test interpretation, and
numerical modelling. The geophysical log investigates the stratigraphy underground
the selected area; it shows that there are multi-layers of Triassic sandstone
separates them a number of Mercia mudstone layers, and that will justify the aquifer
behaviour in the site. There are several number of pumping test methods are applied
in this report, the results concluded the average value of transmissivity of 185.36
2 -3
m /day, while the average of storage coefficient values is 8.25x10 . With regards to
the small-scale field tests, the average hydraulic conductivity estimated using packer test is around 0.173 m/day, on the other hand, the slug test determines the hydraulic conductivity average of 1.14048 m/day. In order to end with more accurate hydraulic results, the numerical model is developed by representing the 14 days pumping test with a discharge of 1481.8 m3/day. The final results of the numerical model demonstrate a similarity in the drawdown of the model and the drawdown of the aquifer which is estimated using the pumping test calculations. Overall, the hydraulic parameters in this area can be determined and organized in order to use it in different studies and uses, for instance, groundwater puplic supplies. Finally, further hydraulic studies are needed, especially in recent time, in order to have results that match with the current period.