Mapping Water Quality Modelling and Catchment Management Research Trends for Sustainable Development in South Africa

Abstract

Water quality degradation in river catchments remains one of the most critical environmental and infrastructural challenges facing South Africa, which mainly involves urbanisation, industrial activities, agricultural runoff, and climate variability. This research presents a scientometric analysis of water quality modelling and catchment management research carried out in South Africa from 2005 to 2025, aiming to map knowledge trends, key contributors, and thematic developments. Using Scopus-indexed data and VOSviewer for network analysis, 50 relevant publications were identified and analysed. The results indicate a steady increase in research output, particularly after the year 2020, with dominant contributions from institutions such as Rhodes University, the University of KwaZulu-Natal, and the University of Cape Town and from funding organisations such as the Water Research Commission and the National Research Foundation. Thematic analysis reveals strong research focus areas in hydrological modelling, water pollution, nutrient dynamics, and decision-support systems, with emerging emphasis on climate change and sustainable water management. These trends strongly align with global sustainability frameworks, particularly Sustainable Development Goals 6 (SDG 6: Clean Water and Sanitation) and 13 (SDG 13: Climate Action), as well as integrated water resource management principles. Despite this progress, gaps remain in interdisciplinary integration and the translation of modelling outputs into policy and practice. This study provides a structured knowledge base to inform research, policy development, and sustainable catchment management strategies in South Africa, with broader applicability to water-stressed regions globally.