Latest News Archive

Please select Category, Year, and then Month to display items
Categories
UFS News Media Release Research
Years
2017 2018 2019 2020 2021 2022 2023 2024
Months
January February March April May June July August September October November December
Previous Archive
04 October 2018 | Story UFS | Photo UFS
Prof Ashok Chapagain, recently appointed as Senior
Prof Ashok Chapagain, recently appointed as Senior Professor in the Department of Agricultural Economics in the Faculty of Natural and Agricultural Sciences at the University of the Free State, is looking forward to working with key water-related sectors.
Prof Ashok Chapagain has recently been appointed as Senior Professor in the Department of Agricultural Economics in the Faculty of Natural and Agricultural Sciences at the University of the Free State (UFS). 

Water hub key in collaborations with research institutes

According to Prof Chapagain, the position provides a unique opportunity to help establish the university at the forefront of water research in South Africa. He is looking forward to cross-departmental collaborations on innovative research projects working with key water-related sectors, such as agriculture, business, mining etc., and establishing a water hub that would be key in external collaborations with other research institutes in South Africa and beyond.

Prior to his formal appointment at the UFS, Prof Chapagain has been remotely involved with the Department of Agricultural Economics since 2017 through his support to a number of research projects funded by the Water Research Commission (WRC). 

He is experienced in managing and coordinating international and interdisciplinary projects, ensuring technical quality and project delivery. He has vast cultural and geographical work experience, and specific water-related experience in the fields of integrated water resource management, water footprint assessment, industrial and agricultural efficiency and sustainability, irrigation, hydrology and watershed modelling, flood-risk management, river-basin planning and management, and environmental impact assessment. He has recently left the Water Footprint Network (The Netherlands), where he worked in the capacity of Science Director. Prior to joining the WFN, Prof Chapagain worked as Senior Water Adviser at WWF-UK for about six years.

Systems approach to address water issues

Prof Chapagain holds a PhD in the field of Water Resources Management and Policy Analysis from Delft University of Technology (The Netherlands), an MSc degree in Water and Environmental Resources Management from UNESCO- IHE Institute for Water Education (The Netherlands), and a Bachelor’s in Civil Engineering from IIT Roorkee (India). His professional career of 28 years can be broadly grouped under two inter-related blocks: development projects for 10 years (as an irrigation engineer in Nepal); research and application for 18 years (academia for eight years and applied work for 10 years in the Netherlands and UK). During his MSc and PhD research, he specialised in water resources and environmental management, integrated river-basin management, policy analysis, and systems analysis.

He regularly reviews articles for several scientific journals. Currently he serves as the Editor-in-Chief for the recently launched open access scientific journal H2Open, published by IWA Publishing. In addition, he serves as editor for five scientific journals, and frequently guest edits specific issues for peer-reviewed scientific journals. He has published four books, and 64 other articles and reports (25 scientific journal articles, 40 papers in conference proceedings, book chapters, and technical reports). His publications are widely cited, with 10 436 citations, and has an h-index of 34 and i10-index of 44. He applies a system approach in addressing issues on water, energy, and food securities, where managing local resources also includes global dimensions where key stakeholders are often cross-sectoral and situated outside the boxes. He has been involved in many national and international projects as a team leader, project leader, and international expert in several Asian, European, and South American countries.

For more information about Prof Chapagain and his role in the Department of Agricultural Economics, please contact Prof Chapagain at ChapagainAK@ufs.ac.za, or Dr Frikkie Maré at MareFA@ufs.ac.za or +27 51 401 2824 

News Archive

Research helps farmers save with irrigation
2017-02-15

Description: Irrigation research Tags: Irrigation research

Marcill Venter, lecturer in the Department of
Agricultural Economics at the University of the
Free State, has developed the mathematical
programming system, Soil Water Irrigation
Planning and Energy Management in order to
determine irrigation pump hours.
Photo: Rulanzen Martin

Her advice to farmers is that they should make sure they are aware of the total cost (investment and operating costs) of an irrigation system. In most cases the investment cost is low, but the operating cost over the lifetime of the system is high.

“It is very important to have a look at the total cost and to install the most economic system,” says Marcill Venter, lecturer at the University of the Free State (UFS), who has done research on the economic sustainability of water-pipe systems.

Irrigation systems important components for farming
This research comes at a time when many farmers are relying on their irrigation systems due to persistent drought and low rainfall during 2016. South Africa has also experienced an abnormal increase in electricity tariffs in recent years. Due to tariff increases which threaten the future profitability of irrigation producers, the Water Research Commission (WRC) has launched and financed a project on the sustainable management of irrigation farming systems. “I had the opportunity to work on the project as a researcher,” says Venter.

The heart of every irrigation system is the water pipes that bring life to crops and livestock, and this is what Venter’s research is about. “Water pipes are part of the whole design of irrigation systems. The design of the system impact certain factors which determine the investment and operating costs,” she says.

Mathematical system to help farmers
Venter and Professor Bennie Grové, also from the Department of Agricultural Economics at the UFS, designed the Soil Water Irrigation Planning and Energy Management (SWIP-E) programming model as part of the WRC’s project, as well as for her master’s degree. “The model determines irrigation pump hours through a daily groundwater budget, while also taking into account the time-of-use electricity tariff structure and change in kilowatt requirements arising from the main-line design,” says Venter. The model is a non-linear programming model programmed in General Algebraic Modeling System (GAMS).

Design of irrigation system important for sustainability
The main outcome of the study is that the time-of-use electricity tariff structure (Ruraflex) is always more profitable than the flat-rate structure (Landrate). The interaction between the management and design of a system is crucial, as it determines the investment and operating costs. Irrigation designers should take the investment and operating cost of a system into account during the design process. The standards set by the South African Irrigation Institute (SAII) should also be controlled and revised.

Water-pipe thickness plays major role in cost cuts
There is interaction between water-pipe thickness, investment and operating costs. When thinner water pipes are installed, it increases the friction in the system as well as the kilowatt usage. A high kilowatt increases the operating cost, but the use of thinner water pipes lowers the investment cost. Thicker water pipes therefore lower the friction and the kilowatt requirements, which leads to lower operating costs, but thicker pipes have a higher investment cost. “It is thus crucial to look at the total cost (operating and investment cost) when investing in a new system. Farmers should invest in the system with the lowest total cost,” says Venter.

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept