The performance of smallholder irrigation schemes is multidimensional and can be looked at from different perspectives. This study assessed the technical performance of the Mooi River irrigation scheme (MRIS) to derive a comprehensive set of best management practices (BMPs). This was done acknowledging that the farmer is now the water manager, in line with participatory irrigation management (PIM) and irrigation management transfer (IMT) concepts. Five performance indicators related to water supply and delivery and agricultural performance were assessed through the field measurement method during spring and summer of the 2010/2011 season. Farmers were interviewed through a questionnaire to gather suggestions on ways to improve the performance of their scheme. Their responses helped in the selection of the BMPs for the scheme which were then ranked using the analytic hierarchy process (AHP). The results show a scheme average conveyance efficiency of 86.4%, maximum dependability of irrigation interval between water applications of 2.57 in spring and the scheme relative irrigation supply of 1.48. Agricultural performance indicators-output per unit irrigation supply and water productivity (ET)-were found to be 0.64 and 5.37 kg m -3 , respectively. Irrigation scheduling was the most preferred BMP by the farmers, while volumetric measurement of irrigation water used by each block was the least preferred. This study concludes that water management in smallholder schemes is poor, thus affecting performance of these schemes, and that farmers are aware of the problems and possible solutions to perennial problems hindering performance in smallholder schemes. The study recommends deepening farmers' participation in policy formulation and derivation of BMPs. Copyright © 2013 John Wiley & Sons, Ltd. RÉSUMÉLa performance des systèmes d'irrigation des petites exploitations est multidimensionnelle et peut être regardée sous différents angles. Cette étude a évalué la performance technique de système d'irrigation de la rivière Mooi (MRIS) afin d'obtenir un ensemble de meilleures pratiques de gestion (BMP). Cela a été fait en reconnaissant que l'agriculteur est maintenant le gestionnaire de l'eau conforme à la gestion participative de l'irrigation (PIM) et en appliquant le concept de transfert de gestion de l'irrigation (IMT). Cinq indicateurs de performance liés à l'approvisionnement, la livraison et les performances agricoles de l'eau ont été évalués par des mesures au champ au cours du printemps et de l'été de la saison 2010/2011. Les agriculteurs ont été enquêtés sur les moyens pour améliorer la performance de leur système. Leurs réponses ont aidé à identifier les BMP qui ont été ensuite classées en utilisant la méthode de hiérarchie multicritère (AHP). Les résultats montrent une efficacité moyenne du système de transport de 86.4%, une régularité maximale des tours d'eau au printemps de 2.57 et un approvisionnement relatif du système de 1.48. Les indicateurs de performance agricoles-la production par commande et la prod...
Some parts of the rural areas of South Africa are receiving water services below the legislative standards stipulated in the Water Services Act (1997) of South Africa. This is because small-scale water infrastructures (SWI), including standpipes, handpumps and windmills, are failing to supply adequate water in rural communities for various activities that enhance their livelihoods. This is due to technical, community, institutional, and environmental factors. Literature indicates that these factors are complex in nature. However, research on their complex interactions has been limited. Therefore, the complex interactions of the factors causing SWI failure were investigated and analysed in this study. A qualitative research approach was employed to investigate the factors that cause failure of SWI. The network approach combined with graph theory and the community structure method were used to generate a theme and domain network that allowed for a systematic analysis and interpretation of the causes of SWI failure in the study area. The major causes of failure identified include: (i) the use of a top-down approach to implement water projects in rural communities without consultation, (ii) sharing of SWI in high numbers due to the limited number of SWI available/functional, resulting in overloading and increased breakdowns, and (iii) drying up of water sources due to poor siting leading to vandalism of SWI. Overall, the causes of SWI failure are as a result of the complex interactions of different categories of factors. The theme and domain network is a powerful tool that can be used represent and analyse the complex interactions. It is therefore imperative for interventions aiming to improve rural water supply to analyse the complex interactions of the causes of SWI failure to understand the underlying problems at a level of a system, in order to propose suitable solutions.
South African agriculture accounts for 62% of the national water demand. Almost 45% of the water is wasted. Therefore, irrigation systems need to improve their water-use efficiency (WUE). However, the WUE of smallholder irrigation schemes in the country, including Agri-Parks, is not precisely known. A study was performed at four Agri-Parks (Rooiwal, Soshanguve, Tarlton, and Westonaria) in Gauteng province to assess the condition and performance of the irrigation systems, as part of a project that aimed to develop a WUE model for smallholder irrigation systems. The Agri-Parks were equipped with efficient irrigation systems in forms of drip and microjets. The assessments were performed at the system component level in February–March 2021. A Condition Assessment Model (CAM), developed by ARC-NRE/AE, was used for the condition assessment. Enumerators observed the system components visually and assigned conditions, which they uploaded into the model to generate condition indices (CIs). Water conveyance efficiency (CE) and distribution uniformity (DU) were assessed on delivery and infield systems, respectively. The CI values ranged 4–6, implying significant deterioration had occurred. The CE was 61–78%, while the DU was 60–95%. The infield system CI correlated positively with the DU, suggesting the CI could predict the DU in drip systems, which was encouraging for the proposed WUE model. However, further research covering a longer period and more Agri-Parks is recommended.
This study assessed the presence of key requirements for sustainable O&M and rehabilitation of rural small-scale water infrastructure in Makhudutamaga Municipality in South Africa. The study found a significant correlation between the requirements for sustainable O&M and rehabilitation of rural small-scale water infrastructure and continuity of service provision (p < 0.001) by the small-scale water infrastructure as well as functionality (p < 0.001) of the small-scale water infrastructure hardware. The study concludes that the presence of the key requirements varies as a function of social dynamics of communities and the presence of these requirements has an impact on the functionality and continuity of the small-scale water infrastructure hardware.
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