Modelling boreholes in complex heterogeneous aquifers
Upton, K.A.; Butler, A.P.; Jackson, C.R.; Mansour, M.. 2019 Modelling boreholes in complex heterogeneous aquifers. Environmental Modelling & Software, 118. 48-60. 10.1016/j.envsoft.2019.03.018
Before downloading, please read NORA policies.Preview |
Text (Open Access Paper)
1-s2.0-S1364815218306133-main.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (4MB) | Preview |
Abstract/Summary
Reliable estimates of the sustainable yield of supply boreholes are critical to ensure that groundwater resources are managed sustainably. Sustainable yields are dependent on the pumped groundwater level in a borehole, how this relates to vertical aquifer heterogeneity, and features of the borehole itself. This paper presents a 3D radial flow model (SPIDERR), based on the Darcy-Forchheimer equation, for simulating the groundwater level response in supply boreholes in unconfined, heterogeneous aquifers. The model provides a tool for investigating the causes of non-linear behaviour in abstraction boreholes, which can have a significant impact on sustainable yields. This is demonstrated by simulating a variable-rate pumping test in a Chalk abstraction borehole. The application suggests the non-linear response to pumping is due to a combination of factors: a reduction in well storage with depth due to changes in the borehole diameter, a reduction in hydraulic conductivity with depth, and non-Darcian flow.
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | 10.1016/j.envsoft.2019.03.018 |
ISSN: | 13648152 |
Additional Keywords: | GroundwaterBGS, Groundwater, Groundwater modelling |
Date made live: | 18 Apr 2019 15:28 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/522964 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year