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Johannes Jaime Sirunda

Johannes Jaime Sirunda
Namibia Water Corporation · Research and Development

Master of Science (Environment and Water)

About

7
Publications
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Introduction
I am currently working the followings: 1. Phytoplankton dynamics in man-made dams. 2. Desalination of brackish water using renewable energy and membrane technologies.

Publications

Publications (7)
Article
Full-text available
The present study aimed to employ different modified indices (Canadian Council of Ministers of the Environment (CCME) water quality index (WQI) and comprehensive pollution index (CPI)) to determine the water quality status of the Swakoppoort and Von Bach dams based on physicochemical and biological parameters. The data generated shows that the CCME...
Article
Full-text available
Toxic phytoplankton in the aquatic ecosystems are dynamic, affecting water quality. It remains unclear as to how possible toxic phytoplankton assemblages vary vertically and temporally in Swakoppoort and Von Bach dams, located in a dry subtropical desert region in central Namibia. The following variables were analyzed: pH, Secchi depths, turbidity,...
Article
Ecological restorations of reservoirs are implemented worldwide; however, minimal successes are reported and understood for warmer African lakes like Swakoppoort Dam, Namibia. The objectives of the study were (a) to establish the effectiveness of the two control measures in reducing cyanobacteria growths in comparison with untreated control areas a...
Article
This paper gives an overview of the main challenges and achievements faced by Windhoek's water management sector. The paper highlights pertinent issues arising from increased water demand, and also explores current and future water supply augmentation options. Water planners experience management challenges as a result of a combination of factors,...
Article
The aim of this research study was to prepare activated carbon from Acacia erioloba (A. erioloba) seedpods and evaluate its application for water treatment. The prepared activated carbon was characterized by using different analytical techniques including; Fourier-transform infrared spectroscopy, scanning electron microscopy, Brunauer–Emmett–Teller...
Chapter
Full-text available
This chapter presents the outcome of research conducted in Otjozondjupa region, central Namibia on the effects of water transfers from two storage dams (Swakoppoort and Omatako Dams) to augment water volume in a third dam (Von Bach Dam) which is located closer to a purification plant. The transfers are strategically made to bring water closer to th...
Chapter
Full-text available
This chapter is based on research carried out to examine the effects of human activities on the quality of water flowing into Von Bach Dam, the water in the dam as well as water flowing out of the dam during different seasons. The specific objectives of the study were to determine water quality at different points around the Von Bach Dam during dif...

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