Eddie Bosman

Eddie Bosman
Stellenbosch University | SUN · Department of Civil Engineering

About

26
Publications
15,624
Reads
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50
Citations
Citations since 2017
17 Research Items
29 Citations
201720182019202020212022202302468
201720182019202020212022202302468
201720182019202020212022202302468
201720182019202020212022202302468

Publications

Publications (26)
Conference Paper
Full-text available
This study provides an independent review on a large automatic TOPS gate, developed by AmanziFlow Projects. The hydraulic evaluation was done with a physical model of the gate on a scale of 1:20 based on the Froude model laws. The prototype dimensions of the gate were 10 m high by 17 m wide installed on a 3 m high ogee weir. The prototype was desig...
Conference Paper
Full-text available
High sedimentation rates at Thwake Dam poses a threat to the dam's design life span. The SHETRAN hydrological model was utilised to estimate the long-term sediment loads. Three sets of scenarios were considered; observed rainfall + the European Space Agency (ESA) land-use changes for (a) the year 2000, for (b) the year 2016 and for (c) the predicte...
Article
Full-text available
The Nqweba Dam is one of the oldest dams in South Africa and was commissioned in 1925 for irrigation. The original reservoir depth at the dam wall was 31 m, but over the years sedimentation has reduced the water depth to 9.8 m. The original storage capacity of 79 million m ³ has decreased to 46 million m ³ by 2020. The dam supplies the town of Graa...
Conference Paper
Full-text available
A 1:60 scale physical hydraulic model study was used to investigate and optimize the proposed design of the left bank additional spillway of the Corumana Dam in Mozambique. A portion of the reservoir, the Piano Key Weir (PKW) control structure, which was 3D printed, the chute, the stilling basin and the downstream river were constructed from concre...
Conference Paper
Full-text available
The proposed ungated spillway of the Polihali Dam was optimised by a 1:40 physical model study for the Matla a Metsi Joint Venture (MaMJV) as part of Phase II of the Lesotho Highlands Water Project. The floods predominantly approach from the left side where a curved wingwall guides the flow over a 98 m long ogee weir with a 2075 masl Full Supply Le...
Conference Paper
Full-text available
Pongolapoort Dam is a double curvature arch dam on the Phongolo River in KwaZulu-Natal. The dam was completed in 1973 and has a wall height of 89 m, making it the third-highest dam in South Africa. Flood control is provided by a centrally located uncontrolled ogee spillway and three radial gate-controlled chute spillways with a flip-bucket energy d...
Conference Paper
Full-text available
Boksburg Lake in the City of Johannesburg, South Africa, used to be a very popular and important public amenity and has now decayed into an unsightly, unsafe and contaminated water body. Of greatest concern to the local residents is the poor personal safety, the unpleasant odour of the lake water and aesthetically unattractive litter that lines the...
Presentation
Full-text available
Boksburg Lake in the City of Johannesburg, South Africa, used to be a very popular and important public amenity and has now decayed into an unsightly, unsafe and contaminated water body. Of greatest concern to the local residents is the poor personal safety, the unpleasant odour of the lake water and aesthetically unattractive litter that lines the...
Preprint
Full-text available
Executive Summary More than a decade ago, a SA Water Research Commission (WRC) study was completed by Stellenbosch University and guidelines were generated for the hydraulic design of river abstraction works: "Considerations for the Design of River Abstraction Works in South Africa" (Basson, 2006). The guidelines have been used in the designs of ma...
Conference Paper
Full-text available
This paper aims to provide design guidelines for optimising a postulated configuration for a sediment flushing system of a low-level outlet at a dam for control of reservoir sedimentation to protect the hydropower intakes. The postulated design, which comprises of a hybrid low-level outlet conduit and low weir, is optimized by means of numerical an...
Conference Paper
Full-text available
Reservoir sedimentation is an ongoing critical concern worldwide with a recorded global average of 33% of reservoir storage capacity already been lost therefrom, which is expected to exceed 50% by 2050 (i.e. not considering new dam projects) (ICOLD, 2009). Drawdown or pressure flushing through low-level dam outlets below hydropower intakes are comm...
Article
Full-text available
Stepped spillways are one of the oldest spillway designs dating back to 500 B.C. With technical advances in Roller Compacted Concrete (RCC) construction, the stepped spillway has become increasingly popular over recent decades. However, the use of this spillway is limited to a maximum safe unit discharge of 25 m²/s due to the risk of cavitation. In...
Conference Paper
Full-text available
The determination of extreme flood levels in an estuary should consider river floods and waves penetrating the estuary. The Breede River estuary in South Africa, 50 km in length, is discussed as case study in this paper. A two-dimensional hydrodynamic model Mike21C of the DHI Group of the 50km estuary (including the estuary mouth) was set up and ca...
Conference Paper
Full-text available
This paper discusses the possible impacts on the Orange River Estuary, of the proposed Noordoewer / Vioolsdrift Dam (NVD) project on the lower Orange River located 300 km upstream of the estuary. The flow patterns and sediment dynamics at the estuary were evaluated as supporting information to the feasibility study of the proposed NVD site. A stati...
Conference Paper
Full-text available
Stepped spillways are one of the oldest spillway designs dating back to 500 B.C. With technical advances in Roller Compacted Concrete (RCC) construction, the stepped spillway has become increasingly popular over recent decades. However, the use of this spillway is limited to a maximum safe unit discharge of 25 m²/s due to the risk of cavitation. In...
Article
Full-text available
The Berg River Dam is equipped with the first multi-level draw-off environmental flood release outlet in South Africa and can release flows up to about 200 m3/s. The outlet is controlled by a radial gate at the outlet end, and is protected by a vertical emergency gate near the inlet end. Commissioning tests of the emergency gate in 2008 found that...
Technical Report
Full-text available
SA Water Research Commission Study on Freeboard for dams in collaboration with the South African Committee on Large Dams
Technical Report
Full-text available
SA Water Research Commission Project Vol1 report Appendices on Freeboard for Dams
Conference Paper
Full-text available
1. ABSTRACT A description of the pre-design investigation, design and construction of a pleasure craft harbour is given. The influence of the breakwaters on the sedimentation pattern in the direct vicinity of the harbour during construction and after completion of the harbour is described. Adaption of the design of some of the harbour components du...
Conference Paper
Full-text available
Information is presented on 38 dolos projects in various parts of the world. Some of the data were collected by means of questionnaires and the remainder are based on publications, reports and personal visits. Information is given on design conditions, structure details, model tests and site experiences. Past dolos research is discussed briefly. Pr...

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Projects

Projects (3)
Project
Guidelines for the design of small to large river abstraction works for potable and irrigation water use, on alluvial rivers, to deal with with sediment. Case studies from Southern Africa. Guidelines for the design of river diversion works on alluvial rivers with sediment control measures for hydro power projects.