Monitoring Groundwater Use as a Domestic Water Source by Urban Households: Analysis of Data from Lagos State, Nigeria and Sub-Saharan Africa with Implications for Policy and Practice
Monitoring Groundwater Use as a Domestic Water Source by Urban Households: Analysis of Data from Lagos State, Nigeria and Sub-Saharan Africa with Implications for Policy and Practice
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DOI：
10.3390/w13040568
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发表时间：
2021-02-01
期刊：
影响因子：
3.4
通讯作者：
Healy, Adrian
中科院分区：
文献类型：
--
作者：
Danert, Kerstin;Healy, Adrian
人们越来越认识到地下水对撒哈拉以南非洲城市饮用水供应的根本重要性。然而，人们对个别家庭开发城市地下水的趋势及其在确保安全管理的饮用水供应方面的作用知之甚少。坊间证据表明，在撒哈拉以南非洲的一些城市地区，开采地下水的自给自足运动蓬勃发展，但经验证据，或对其好处和缺点的分析，仍然很少。通过对尼日利亚拉各斯州官方数据集的详细分析，我们研究了地下水，特别是家庭自给供水在家庭供水中所发挥的关键作用。然后，我们把这一点放在尼日利亚和撒哈拉以南非洲的背景下。这种多标量方法的新颖性之一是，它提供了对大规模数据集的细粒度理解。我们的分析证实了非管道供水在满足撒哈拉以南非洲部分地区家庭当前和未来的饮用水需求方面的重要性，以及地下水通过自给自足所发挥的作用。我们的结果证明了数据集之间的不一致，并对未来提出了建议。我们认为，官方报告的数据在很大程度上忽视了饮用水供应的关键参与者--个人家庭，这对政策和实践都有影响。
The fundamental importance of groundwater for urban drinking water supplies in sub-Saharan Africa is increasingly recognised. However, little is known about the trends in urban groundwater development by individual households and its role in securing safely-managed drinking water supplies. Anecdotal evidence indicates a thriving self-supply movement to exploit groundwater in some urban sub-Saharan African settings, but empirical evidence, or analysis of the benefits and drawbacks, remains sparse. Through a detailed analysis of official datasets for Lagos State, Nigeria we examine the crucial role played by groundwater and, specifically, by household self-supply for domestic water provision. We then set this in the context of Nigeria and of sub-Saharan Africa. One of the novelties of this multi-scalar approach is that it provides a granular understanding from large-scale datasets. Our analysis confirms the importance of non-piped water supplies in meeting current and future drinking water demand by households in parts of sub-Saharan Africa and the role played, through self-supply, by groundwater. Our results demonstrate inconsistencies between datasets, and we make recommendations for the future. We argue that a key actor in the provision of drinking water supplies, the individual household, is largely overlooked by officially reported data, with implications for both policy and practice.