Authors : Tashok Yusuf Haruna; Lawal Rodiat Ifedolapo; Oduwa Austin Osaretin; Shofuyi Ayodeji; Babamboni Adekunle

Volume/Issue : Volume 11 - 2026, Issue 4 - April

Google Scholar : https://tinyurl.com/255m7zds

Scribd : https://tinyurl.com/3wh3xxwz

DOI : https://doi.org/10.38124/ijisrt/26apr582

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Abstract : Environmental degradation threatens rapidly urbanising developing cities, with Lagos exemplifying these challenges. While landscape design is theorised as a mitigation strategy, empirical evidence in high-density tropical African contexts remains scarce. This study evaluates landscape design effectiveness in Lagos, examining relationships between green infrastructure characteristics and environmental quality outcomes. Using a descriptive survey design, researchers analysed 150 sample plots across five districts through spatial analysis, environmental measurements (air temperature, PM2.5, noise), and 750 household surveys. Stratified random sampling captured variation across core urban, semi-urban, and urban fringe areas, with data analysed via spatial statistics and regression modelling. Results showed green coverage significantly correlated with lower ambient temperature (r=-0.67), PM2.5 (r=-0.58), and noise (r=-0.44). Integrated softhard landscape designs achieved 3.2°C temperature reduction, 34% lower PM2.5, and 12 dB noise reduction versus unvegetated areas. Multivariate regression identified tree canopy coverage, green space connectivity, and soil permeability as significant environmental quality predictors (R²=0.71). Community perception recognised benefits (78%), though maintenance deficiencies limited outcomes. Landscape design proves effective and scalable for environmental mitigation in Lagos, with integrated approaches yielding superior results. Full potential realisation requires governance reforms addressing maintenance, community participation, and climate-adaptive species selection.

Keywords : Landscape Design, Environmental Degradation, Green Infrastructure, Urban Heat Island, Air Quality, Lagos, Nigeria, Megacities.

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