Your search found 7 records
1 Jovanovic, N. Z.; Annandale, J. G.; BenadT, N.; Rethman, N. F. G. 1999. SWB - A mechanistic water balance-soil salinity model for irrigation with lime-treated acid mine drainage. In ICID, 17th Congress on Irrigation and Drainage, Granada, Spain, 1999: Water for Agriculture in the Next Millennium - Transactions, Vol.1G, Special Session. New Delhi, India: ICID. pp.73-92.
Water balance ; Soil salinity ; Models ; Irrigation scheduling ; Drainage ; Irrigation water ; Water quality ; Crop yield / South Africa
(Location: IWMI-HQ Call no: ICID 631.7 G000 ICI Record No: H025228)
2 Annandale, J. G.; Campbell, G. S.; Olivier, F. C.; Jovanovic, N. Z.. 2000. Predicting crop water uptake under full and deficit irrigation: An example using pea (Pisum sativum L. cv. Puget) Irrigation Science, 19(2):65-72.
Evaporation ; Crop production ; Irrigation scheduling ; Water deficit ; Soil water ; Water balance ; Water use ; Simulation models ; Water loss ; Water stress ; Experiments / South Africa / Pretoria
(Location: IWMI-HQ Call no: PER Record No: H025702)
3 Jovanovic, N. Z.; Annandale, J. G. 2000. Crop growth model parameters of 19 summer vegetable cultivars for use in mechanistic irrigation scheduling models. Water SA, 26(1):67-76.
Plant growth ; Vegetables ; Irrigation scheduling ; Computer models ; Soil water ; Water balance ; Measurement ; Crop yield ; Water requirements ; Estimation
(Location: IWMI-HQ Call no: P 5537 Record No: H027318)
4 Annandale, J. G.; Jovanovic N. Z.; BenadT, N.; Allen, R. G. 2002. Software for missing data error analysis of Penman-Monteith reference evapotranspiration. Irrigation Science, 21(2):57-67.
Crop production ; Water requirements ; Evapotranspiration ; Soil-water-plant relationships ; Measurement ; Computer techniques ; Statistical analysis ; Sensitivity analysis
(Location: IWMI-HQ Call no: PER Record No: H029775)
5 Annandale, J. G.; Jovanovic, N. Z.; Campbell, G. S.; Du Sautoy, N.; Benadé, N. 2003. A two-dimensional water balance model for micro-irrigated hedgerow tree crops. Irrigation Science, 22(3-4):157-170.
Models ; Soil water ; Water balance ; Irrigation systems ; Crop production ; Irrigation efficiency / Africa
(Location: IWMI-HQ Call no: PER Record No: H033551)
6 Idowu, O. A.; Lorentz, S. A.; Annandale, J. G.; McCartney, Matthew P.; Jovanovic, N. Z.. 2008. Assessment of the impact of irrigation with low-quality mine water on virgin and rehabilitated soils in the Upper Olifants Basin. Mine Water and the Environment, 27: 2-11.
Wastewater irrigation ; Water quality ; Water reuse ; Soil water ; Salinity ; Monitoring ; Models / South Africa / Upper Olifants Basin
(Location: IWMI HQ Call no: IWMI 631.7.5 G178 IDO Record No: H041084)
Low-quality mine water from collieries may be used in large quantities to irrigate agricultural crops on virgin (unmined) and rehabilitated soils in South Africa. Such a use could enhance crop production and allow environmentally sustainable mine water disposal. In this study, the volume and qualities of the runoff from two centre pivots irrigated with moderately saline mine water, as well as their soil water salinities, were monitored and used to determine water and salt balances, using the modified ACRU agrohydrological model, ACRU2000, and its salinity module, ACRUSalinity. At both sites, much of the water evaporated, while a significant part of the salt input either recipitated or remained with the water in the soil horizons. A higher percentage of drainage water (and salinity) were retained as ground water storage and a lower percentage of runoff occurred in the rehabilitated sandy loam soil, while a higher percentage of salts accompanied runoff in the virgin clayey soils. Simulated salt saturation values indicate that many crops could be successfully irrigated at 100% yield potential at either site. Electrical resistivity surveys were carried out at both sites. A general decrease in resistivities with depth in both the virgin and rehabilitated soils reflected the decreasing influence of the mine water used for irrigation with depth and the precipitation of salts in the soils close to the ground surface. The occurrence of a thicker, low- resistivity, near-surface layer near the exit of each pivot area indicates that the water and salt content of the subsurface increased in the direction that the surface and near-surface irrigation water flowed.
7 Pienaar, H.; Xu, Y.; Braune, E.; Cao, J.; Dzikiti, S.; Jovanovic, N. Z.. 2021. Implementation of groundwater protection measures, particularly resource-directed measures in South Africa: a review paper. Water Policy, 16p. (Online first) [doi: https://doi.org/10.2166/wp.2021.016]
Groundwater management ; Water resources ; Water conservation ; Water governance ; Institutions ; Legislation ; Strategies ; Aquifers ; Water levels ; Surface water ; Catchment areas ; Water supply ; Water use ; Monitoring / South Africa
(Location: IWMI HQ Call no: e-copy only Record No: H050458)
https://iwaponline.com/wp/article-pdf/doi/10.2166/wp.2021.016/904391/wp2021016.pdf
https://vlibrary.iwmi.org/pdf/H050458.pdf
https://vlibrary.iwmi.org/pdf/H050458.pdf
(0.96 MB) (980 KB)
This review paper on groundwater protection measures in South Africa focuses on the actual implementation of groundwater protection measures, in particular, the resource-directed measures (RDM) as described in Chapter 3 of the National Water Act (NWA). Significant catchment-wide implementation of RDM has taken place in a phased manner throughout various catchments since 2012. By 2015, approximately R380 million had been expended on the catchment-wide implementation of the water resource protection measures over a period of 15 years. Considerable effort went into refining the RDM methodology, taking into account the groundwater component of the overall resource. In this paper, we contend that RDM, in its present form, will not make a significant contribution to groundwater resource protection and security in the country. This is a major concern because the Groundwater Strategy of the Department of Human Settlements, Water and Sanitation (DHSWS) had declared the protection of groundwater as a national priority. This paper also examines institutional and governance arrangements (or lack thereof) as well as providing recommendations to support the effective implementation of groundwater protection provisions as prescribed by South Africa's water legislation.
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