Groundwater recharge in Africa: identifying critical thresholds

非洲地下水补给：确定关键阈值

基本信息

批准号：
NE/L002035/1
负责人：
Alan MacDonald
金额：
$ 10.01万
依托单位：
British Geological Survey
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2013
资助国家：
英国
起止时间：
2013 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FL002035%2F1
关键词：
Groundwater recharge Africa identifying critical

项目摘要

The development of groundwater for safe drinking water, irrigation and other uses offers huge potential for improving the lives of many African people. Recent research showed that groundwater was present in most parts of Africa and represented a resource greater than the water available in lakes and rivers. However, a key uncertainty is how sustainable groundwater abstraction will be: is it being replenished and if so by how much and will this change in the future?This research project will bring together a team of African, European and US scientists to examine all the available evidence for groundwater recharge across Africa. The team will use these data to search for the existence of critical recharge thresholds: conditions beyond which recharge may not occur or become unreliable. They will use the datset to develop a map of observed groundater recharge volumes for Africa and look for systematic changes across the continent. The team will also use the opportunity to examine the different methods for measuring groundwater recharge and identify the most appropriate for African conditions.Together with social scientists they will use the results of the research to highlight areas and future scenarios where groundwater recharge may become a major contraint on sustainable groundwater abstraction, and where wells or boreholes may run dry, impacting particularly on the rural poor. The maps of groundwater recharge, and the quantification of critical thresholds can have many different uses: they should help quantify the risks of groundwater development and manage tradeoffs in abstraction for the benefit of the poor; for water engineers working in Africa, they should allow a first pass assessment of groundwater recharge to screen whether recharge may be a major constraint on a project, and also provide the tools for measuring recharge more accurately; for the academic community these new datasets can be used to validate global or continetal scale land surface hydrological models. Once the research is completed a workshop and webinar convened by WaterAid will help explore the implications of the research results for planning and implementing new water projects in Africa.The results of this research will be used as a springboard to design a large field programme of interdisciplinary research to examine the processes which lead to these critical recharge thresholds to allow much more reliable forecasts of where groundwater development may become unsustainable in the future and to explore how groundwater can be best managed in these critical areas.

用于安全饮用水，灌溉和其他用途的地下水的发展为改善许多非洲人民的生活提供了巨大的潜力。最近的研究表明，地下水在非洲的大部分地区都存在，并且代表了比湖泊和河流可用的水更大的资源。但是，关键的不确定性是地下水抽象的可持续性是如何：是否得到补充，如果是这样，将来会发生多少变化？该研究项目将汇集一个非洲，欧洲和美国科学家团队，以检查非洲各地地下水补偿的所有可用证据。团队将使用这些数据来搜索关键补给阈值的存在：超越补给可能不会发生或变得不可靠的条件。他们将使用数据集为非洲开发观察到的地面基水充值量图，并在整个非洲大陆寻找系统的变化。该团队还将利用机会检查不同的方法来衡量地下水充电并确定最适合非洲状况的方法。与社会科学家一起，他们将利用研究结果来突出地下水和未来的场景，在这些场景中，地下水充电可能成为可持续的可持续地下水，以及对井眼或腐烂的疾病，尤其是在疾病中造成的，尤其是在疾病中造成的疾病。地下水补给的地图以及临界阈值的量化可能有许多不同的用途：它们应有助于量化地下水开发的风险，并为穷人的利益管理折衷方案；对于在非洲工作的水工程师，他们应该允许对地下水充电进行首次通过评估，以筛选补给是否可能是对项目的主要限制，并且还提供了更准确测量补给的工具；对于学术界，这些新数据集可用于验证全球或持续规模的土地表面水文模型。一旦研究完成，WaterAid召集的研讨会和网络研讨会将有助于探索研究结果对非洲计划和实施新的水项目的含义。这项研究的结果将被用作设计大型跨学科研究的大型现场研究计划，以检查这些过程，以检查这些重要的良好的预期，以使其成为更多的交流者，以使其成为更多的交流者，以使其成为熟悉的未来，以实现的方式，以实现的方式，以实现的方式，以实现良好的未来。可以在这些关键领域得到最好的管理。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Intensive rainfall recharges tropical groundwaters

DOI：
10.1088/1748-9326/10/12/124015
发表时间：
2015-12
期刊：
Environmental Research Letters
影响因子：
6.7
作者：
S. Jasechko;R. Taylor
通讯作者：
S. Jasechko;R. Taylor

Mapping groundwater recharge in Africa from ground observations and implications for water security

DOI：
10.1088/1748-9326/abd661
发表时间：
2021-02
期刊：
Environmental Research Letters
影响因子：
6.7
作者：
A. MacDonald;R. Lark;R. Taylor;T. Abiye;H. Fallas;G. Favreau;I. Goni;S. Kebede;B. Scanlon;J. Sorensen;M. Tijani;K. Upton;C. West
通讯作者：
A. MacDonald;R. Lark;R. Taylor;T. Abiye;H. Fallas;G. Favreau;I. Goni;S. Kebede;B. Scanlon;J. Sorensen;M. Tijani;K. Upton;C. West

Synthesis on groundwater recharge in Southern Africa: A supporting tool for groundwater users

南部非洲地下水补给综合：地下水用户的支持工具