Water Security and Drought Resilience in the South of Angola

Serrat-Capdevila, Aleix; Limones, Natalia; Marzo-Artigas, Javier; Marcus, Wijnen; Petrucci, Bruno

doi:10.1596/37189

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…To support the rapid interest and prospective investments on sand dams in Angola (World Bank, 2022), Serrat‐Capdevila et al (2022) have recently investigated the potential for constructing sand dams in the area, although without providing a specific potential location for sand dams construction. Our results (the 16 locations assessed with the integrated approach) can thus provide concrete support to investments on sand dams in the area, supporting local water development projects with both our quantitative and qualitative results.…”

Section: Discussionmentioning

confidence: 99%

Large‐scale siting of sand dams: A participatory approach and application in Angolan drylands

et al. 2022

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Sand dams are simple and effective structures built across ephemeral riverbeds in arid/ semiarid regions to harvest water within sand pores and increase water availability and quality for rural communities. The complex morphological, hydrological, social, and economic conditions that make sand dams a beneficial tool for water resilience are largely influenced by the siting phase. Proper location of a sand dam can reduce communities' travel time to water points, reduce water conflicts, and increase food security through expansion of irrigated agriculture. On the other hand, a misplacement of sand dams can, at worst, increase disparities in water access and increase local conflicts. To approach a viable siting of sand dams, most projects are developed and delivered with the community through a bottom-up approach. However, in the case of large-scale projects, remote sensing and biophysical analysis are the dominant approach, leaving the socio-economic component at the margins of the siting strategy and eventually affecting the benefits to local communities. In this paper, we propose a large-scale participatory methodology to sand dams siting, which draws on mixed-methods connecting the conventional top-down biophysical analysis with bottom-up participatory research. We first describe the generic approach developed for sand dams siting in Namibe, a semi-arid region of Southwest of Angola, then we draw on our case to propose a generic approach to large-scale participatory siting beyond Namibe.

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Section: Discussionmentioning

confidence: 99%

Large‐scale siting of sand dams: A participatory approach and application in Angolan drylands

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…To support the rapid interest and prospective investments on sand dams in Angola (World Bank, 2022), Serrat-Capdevila et al (2022) have recently investigated the potential for constructing sand dams in the area, although without providing a specific potential location for sand dams construction. Our final results (the 16 locations assessed with the integrated approach) can thus provide concrete support to investments on sand dams in the area, supporting local water development projects with both our quantitative and qualitative results.…”

Section: Insights Into Sand Dams Viability and Overall Fit In Namibementioning

confidence: 99%

Large-scale siting of sand dams: a participatory approach and application in Angolan drylands

Piemontese

Limones

Castelli

et al. 2022

Preprint

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Sand dams are simple and effective structures built across ephemeral riverbeds in arid/semi-arid regions to harvest water within sand pores and increase water availability and quality for rural communities. The complex morphological, hydrological, social and economic conditions that make sand dams a beneficial tool for water resilience are largely influenced by the siting phase. Proper location of a sand dam can reduce community’s travel time to water points, reduce water conflicts and increase food security through expansion of irrigated agriculture. On the other hand, a misplacement of sand dams can, at worst, increase disparities in water access and increase local conflicts. To approach a viable siting of sand dams, most projects are developed and delivered with the community through a bottom-up approach. However, in case of large-scale project, remote sensing and biophysical analysis are the dominant approach, leaving the socio-economic component at the margins of the siting strategy and eventually affecting the benefits to local communities. In this paper, we propose a large-scale participatory methodology to sand dams siting, which draws on mixed-methods connecting the conventional top-down biophysical analysis with bottom-up participatory research. We first describe the generic approach developed for sand dams siting in Namibe, a semi-arid region of South-west of Angola, then we draw on our case to propose a generic approach to large-scale participatory siting beyond Namibe.

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Contribution of the time domain electromagnetic method to the study of the Kalahari transboundary multilayered aquifer systems in Southern Angola

Francés,

Ramalho,

Monteiro Santos

et al. 2024

Hydrogeol J

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The Cunene Province (Southern Angola) is facing recurrent and pluriannual droughts. Surface water supply could be reinforced using the groundwater resources of the multilayered aquifer systems (MAS) hosted in the siliciclastic sediments of the Kalahari Group. The MAS were first identified in the early 2000s in Northern Namibia and recently in the Cunene Province, by studies of the PLANAGEO project based on modern processing and reinterpretation of legacy data from the 1960s and 1970s (electrical resistivity data and deep boreholes). This article presents the results of a time domain electromagnetic (TDEM) survey conducted in the Cunene Province to: (i) contribute to the design of the hydrogeological conceptual model of the transboundary MAS, namely their geometry and extension; (ii) validate the reprocessing of the legacy data; and (iii) guide the future location of boreholes. Results depict the geometry of the sedimentary basin and the characterization of the MAS, with particular emphasis on the intermediate and deep aquifers. The borehole siting, based on the interpretation of the new TDEM data and the legacy data (clay markers in borehole logs), was successful, with a good agreement between estimated and observed horizons of the deep aquifers. However, the presence of clayey layers, a clay-rich matrix in the detrital deposits and saline/brackish groundwater led to uncertainties in the interpretation of the electrical transects. As such, recommendations are made to improve future data collection and mapping of the MAS.

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Water Security and Drought Resilience in the South of Angola

Cited by 4 publications

References 11 publications

Large‐scale siting of sand dams: A participatory approach and application in Angolan drylands

Large‐scale siting of sand dams: A participatory approach and application in Angolan drylands

Large-scale siting of sand dams: a participatory approach and application in Angolan drylands

Contribution of the time domain electromagnetic method to the study of the Kalahari transboundary multilayered aquifer systems in Southern Angola

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