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<p>This study investigated the impact of the COVID-19 pandemic on water quality in three wetlands in Oran, Algeria: Lake Dayet Oum Rhalez (DORh), Lake Dhayat Morasli (DMo), and Lake Sidi Chahmi (SCh). Three key parameters were analyzed from 2019 to 2022: chlorophyll-a concentration (Chl-a), trophic state index (TSI), and Secchi depth (SD). Quantitative analysis revealed a reduction in Chl-a from 41.73 to 21.01&#xa0;µg/l for DMo and from 42.82 to 23.08&#xa0;µg/l for SCh. Similarly, the TSI values decreased from 5.95 to 5.36 for DMo and from 5.32 to 4.12 for SCh. Concurrently, the SD values improved, with transparency increasing from 1.31 to 2.75&#xa0;m for DMo and 1.4&#xa0;m to 2.07&#xa0;m for SCh. These changes indicate that lockdown measures reduced biological activity and improved water quality. Despite the challenges in obtaining On-site validation measurements, this research provides valuable insights to inform better decision-making and strategies for preserving these fragile ecosystems.</p>

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Analysis of the impact of the COVID-19 pandemic lockdown on spatiotemporal variations in water quality in three wetland areas in Oran, western Algeria

  • 期刊论文

  • 发表日期：

    2025年2月28日

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  • Abdelhalim Bendib,
  • Mohamed Lamine Boutrid

摘要

This study investigated the impact of the COVID-19 pandemic on water quality in three wetlands in Oran, Algeria: Lake Dayet Oum Rhalez (DORh), Lake Dhayat Morasli (DMo), and Lake Sidi Chahmi (SCh). Three key parameters were analyzed from 2019 to 2022: chlorophyll-a concentration (Chl-a), trophic state index (TSI), and Secchi depth (SD). Quantitative analysis revealed a reduction in Chl-a from 41.73 to 21.01 µg/l for DMo and from 42.82 to 23.08 µg/l for SCh. Similarly, the TSI values decreased from 5.95 to 5.36 for DMo and from 5.32 to 4.12 for SCh. Concurrently, the SD values improved, with transparency increasing from 1.31 to 2.75 m for DMo and 1.4 m to 2.07 m for SCh. These changes indicate that lockdown measures reduced biological activity and improved water quality. Despite the challenges in obtaining On-site validation measurements, this research provides valuable insights to inform better decision-making and strategies for preserving these fragile ecosystems.