Evidence map›Paper›PMID 42185357›Full record

ArticleScientific reports2026

A theoretical approach to the remediation of saline streamflow conditions downstream of the Nwanedi catchment reservoir.

Anesu Dion Gumbo, Evison Kapangaziwiri, Ephias Mugari, Simbarashe Kativhu, Marizvikuru Manjoro, Sagwati Eugene Maswanganye, Lebogang Machimana, Nthaduleni Nethengwe

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Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Anesu Dion GumboDepartment of Geography and Environmental Sciences, University of Venda, Thohoyandou, 0950, South Africa. diongumbo@gmail.com.
Evison KapangaziwiriInstitute of Water Studies, Department of Earth Sciences, University of the Western Cape, Bellville, 7535, South Africa.
Ephias MugariCentre for Global Change, Department of Plant Production, Soil Science and Agricultural Engineering, University of Limpopo, Polokwane, 0727, South Africa.
Simbarashe KativhuDirectorate of Community Engagement, Entrepreneurship, Inclusive Innovation and Commercialisation, University of Venda, Thohoyandou, 0950, South Africa.
Marizvikuru ManjoroInstitute of Rural Development, University of Venda, Thohoyandou, 0950, South Africa.
Sagwati Eugene MaswanganyeNRF-South African Environmental Observation Network, Fynbos Node, Cape Town, South Africa.
Lebogang MachimanaDepartment of Geography and Environmental Sciences, University of Venda, Thohoyandou, 0950, South Africa.
Nthaduleni NethengweDepartment of Geography and Environmental Sciences, University of Venda, Thohoyandou, 0950, South Africa.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Nwanedi River Catchment in Limpopo Province, South Africa, experiences seasonal salinity accumulation that constrains downstream water use and undermines agricultural productivity. This study develops a hydrology-based framework to define environmental flow requirements (EFRs) to mitigate salinity through flow-driven dilution and flushing. A desktop methodology integrating the Revised Desktop Reserve Model (RDRM), GIS-based catchment characterisation, stakeholder insights, and empirical water quality analysis was implemented. Results reveal a distinct downstream increase in salinity, with electrical conductivity (EC) reaching approximately 146.8 mS/m during the dry season. Modelled EFRs indicate that, under Environmental Management Class D, minimum low-flow allocations correspond to 18.7% and 21.0% of mean annual runoff for sub-catchments A80H and A80J, respectively. Monthly dry-season flow releases range between 0.35 and 1.05 Mm

Indexed as

Agricultural sustainabilityEnvironmental flowsIrrigation efficiencySaline baseflowSustainable practicesWater resources management

Identifiers

PMID42185357
PMCPMC13294502

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LicenceCC BY-NC-ND
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.