Table 3.

Summary of the effects

ThemeDescriptionAffected places in SSAReferences
Biodiversity lossWetland areas are diminishing, limiting their ability to absorb floods and support biodiversity
  • Nairobi River Basin − Kenya

  • Lagos Lagoon − Nigeria

  • Okavango Delta − Botswana

  • Cape Flats wetlands − South Africa

(Balwan and Kour, 2021; Blanckenberg et al., 2020; Gitonga and Kanyepi, 2022; Leisher et al., 2022; Mosepele and Mosepele, 2021; Stephenson et al., 2020; Thamaga et al., 2022; Orie, 2017)
Flooding and altered hydrologyUncontrolled construction in floodplains has increased the frequency and severity of flooding in the city since wetlands that used to absorb excess water have been built over
  • Incomati River wetlands − Mozambique

  • Msimbazi River Basin − Tanzania

  • Jukskei River catchment − South Africa

(Ekolu et al., 2024; Ficchì and Stephens, 2019; Geris et al., 2022; Hoguane and Antonio, 2016; Ketter, 2018; Kibugu et al., 2022; Moeketsi et al., 2022)
Water quality degradationReduced water filtering capacity leads to lower water quality in the city’s rivers and streams
  • Nyabarongo Wetlands − Rwanda

  • Nakivubo Swamp − Uganda

  • Densu Delta wetlands − Ghana

  • Niger River wetlands − Mali

(Chen et al., 2022; Donatus et al., 2022; Diop et al., 2022; Gatwaza and Wang, 2021; Lapworth et al., 2017; Nkiaka et al., 2021; Nalubega and Kansiime, 2020; Thompson et al., 2017)
Loss of livelihoodsThe degradation of these wetlands has resulted in decreasing fish stocks and agricultural output, causing economic hardship and food security issues for locals
  • Mombasa wetlands, including the Tudor Creek area (Kenya)

  • Senegal River Delta in Saint-Louis

  • Lekki region of Lagos − Nigeria

(Adhya and Banerjee, 2022; Ballut-Dajud et al., 2022; Idiege et al., 2017; Kundu et al., 2024; Nyamao, 2015; Triplet et al., 2018; Zekarias et al., 2021)
Source(s): Authors’ own work

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