Use this URL to cite or link to this record in EThOS:
Title: The near field boundary of dewatering systems : estimating individual yields for wells operating under gravity flow
Author: Botha, Christoffel Philippus
ISNI:       0000 0004 6497 4621
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 2017
Availability of Full Text:
Access from EThOS:
Full text unavailable from EThOS. Please try the link below.
Access from Institution:
The subject of this thesis is the estimation of individual well yields, which is a fundamental part of a multi-well abstraction system design. A literature review of the subject shows that the current best practice for estimating individual well yields has several shortcomings and that further research on the topic is required for individual wells operating under gravity flow. The proposal by Sichardt (1927) for estimating the hydraulic gradient at entry into wells is reviewed and his suggestions are compared to the findings in the field. Pumping test data from eight individual abstraction wells, operating under gravity flow in aquifers having a range of permeability values, are presented. The permeability of the aquifer and the implied hydraulic entry gradient into the well were calculated from the data. The findings also show that Sichardt’s (1927) formula provides reasonable results for permeabilities in the range 1 x 10-5 up to 2.15 x 10-3m/s. For permeability values below 1 x 10-5 m/s Sichardt (1927) a reasonable estimation, but the results need to be used with caution.
Supervisor: Powrie, William Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available