Gobana Mohammedsalih Kadir, Getahun Alemayehu Haddis, Olani Dessalegn Dadi
Department of Environmental Health Sciences and Technology, Jimma University, Jimma, Ethiopia.
Water Environ Res. 2025 Jul;97(7):e70114. doi: 10.1002/wer.70114.
There was a strong relationship between rivers and human settlements from the time human beings started a sedentary lifestyle to the present day. This connection between humans and rivers affects river water quality and its ecology, resulting in human health problems. To solve this problem, river channelization and riverside projects are preferred as primary solutions in different countries. The objective of this study is to assess the significance of river channelization and river corridors for surface water quality and ecological integration. Twelve water quality indicators, namely, temperature, electrical conductivity, pH, dissolved oxygen (DO), BOD, COD, nitrate, phosphate, TDS, TSS, and fecal coliform were analyzed. The findings of this study show that the Awetu River channelization contributed to the improvement of water quality, but it is not at the required quality and standard. Many parameters analyzed in the channelized segment of the river were not within the permissible limits of the WHO and Ethiopian standards for drinking water as well as the Guideline Surface Water Quality Standards. The average values of the channelized segment for most variables were between those of the two unchannelized segments, indicating a lack of significant change in water quality as a result of the project. A comparison of the water quality after the project with previous data revealed improvements in most of the parameters. The project also significantly contributed to flood risk prevention, solid waste, and bad smell reduction. The results of interviews with local stakeholders also support the results of practical studies. All of them believe that the project contributed to water quality improvement and reduction of related risk. However, most of them (96%) believe it is not sufficient to solve the problems. The lack of emphasis on liquid waste prevention, lack of uniformity in riverside free space, and lack of recording baseline data for the water quality status and composition of the ecological flora and fauna constitute the main feedback of the project.
从人类开始定居生活至今，河流与人类聚居地之间存在着紧密的联系。人类与河流之间的这种关联影响着河流水质及其生态，进而引发人类健康问题。为解决这一问题，河道整治和滨水项目在不同国家被优先作为主要解决方案。本研究的目的是评估河道整治和河流廊道对地表水水质及生态整合的重要性。分析了12项水质指标，即温度、电导率、pH值、溶解氧（DO）、生化需氧量（BOD）、化学需氧量（COD）、硝酸盐、磷酸盐、总溶解固体（TDS）、总悬浮物（TSS）和粪大肠菌群。本研究结果表明，阿韦图河的河道整治有助于水质改善，但未达到所需的质量和标准。在该河整治段分析的许多参数未符合世界卫生组织及埃塞俄比亚饮用水标准以及《地表水水质标准导则》规定的允许限值范围。大多数变量在整治段的平均值介于两个未整治段之间，这表明该项目实施后水质没有显著变化。将项目实施后的水质与之前的数据进行比较发现，大多数参数都有改善。该项目在防洪、减少固体废物和异味方面也做出了显著贡献。与当地利益相关者的访谈结果也支持实际研究结果。他们都认为该项目有助于水质改善并降低相关风险。然而，他们中的大多数人（96%）认为这不足以解决问题。对液体废物预防缺乏重视、滨水自由空间缺乏一致性以及缺乏对水质状况以及生态动植物组成的基线数据记录，构成了该项目的主要反馈意见。
