Health and wellbeing though universal WASH services
This community of practice is a group of researchers from the environmental, engineering, and social sciences who are tackling the challenges of Water, Sanitation and Hygiene (WASH) in a rapidly changing global climate.
The big challenges that we are addressing are:
- Improving rural water supply, focussing on water security and seasonal impacts of supply. Many rural communities in semi-arid areas experience highly seasonal rainfall which is mostly lost as run-off. As the dry season progresses, their water sources dry up and communities have to travel further to collect water which often has poor quality. By retaining water and encouraging aquifer recharge, water sources can remain sustainable throughout the dry season. We are seeking to understand the water balance and quality implications of these systems.
- Scaling safe urban sanitation, focussing on how to reach citywide inclusive sanitation. The scope of research includes the institutional framework, technologies and business models. In many dense urban environments, there is no sewage infrastructure and the management of non-sewered sanitation is inadequate. We need to answer the wider questions of whether advanced technology for on-site sanitation can be appropriate in these settings and on the roles and responsibilities of all actors; public, private and third sector.
These challenges are exacerbated by Climate change, which has serious implications for the livelihoods of the global poor, particularly affecting their water security and increasing health risks. Communities are already innovating and adapting, but these actions can be poorly coordinated. Urbanisation is changing the way that services need to be delivered. Dense environments mean that at least some centralisation is required, but service providers are not able to keep pace with the rapid rate of urban growth. Interventions can have a wide reaching impact new and emerging health risks, such as the Covid-19 pandemic has highlighted how essential it is to understand hygiene behaviours to prevent and protect human health during infectious disease outbreaks
We work with project partners to ensure that our projects are relevant and useful for those working on the ground. We partner with industry, other academic institutions, and local and international NGOs to co-design projects, implement research and deliver results. We strive to ensure all stakeholders are involved in research projects from start to finish. Working with project partners encourages cross-disciplinary learning for all parties involved and promotes diversity within our research and practice.
Our areas of work
Urban sanitation
In many dense urban environments, there is no sewage infrastructure and the management of on-site sanitation is inadequate. We are particularly interested in the potential for Container Based Sanitation, where small cartridges of waste are collected weekly from households. As this approach scales up, it will have impacts of people’s wellbeing, on institutions and on other resources, and we are seeking to understand these impacts.
Sustainable groundwater
Groundwater accounts for 30% of earth’s freshwater resources. It collects under the earth’s surface, filling porous spaces in soil, rocks and sediments. We drill into these spaces to access the water for domestic, agricultural and industrial water supplies. Groundwater is replenished by rain and snow melts and is becoming more and more important for regions experiencing water scarcity as surface waters dry up. This said, it is a finite resource that needs sustainable and effective management which can be improved through research, policy and developing technical capacity.
Many rural communities in semi-arid areas experience highly seasonal rainfall which is mostly lost as run-off. As the dry season progresses their water sources dry up and they have to travel further to collect water which often has poor water quality. By retaining water and encouraging aquifer recharge, water sources can remain sustainable throughout the dry season. We are seeking to understand the water balance and quality implications of these systems.
Current research is focussing on groundwater vulnerability in coastal and dry-land regions. We are interested in assessing both the physical and social systems to improve water security for rural and rapidly growing communities by influencing policy and decision-making.
Improving the institutional functioning of the sector
The sustainable provision of water and sanitation services require effective institutional systems that facilitate ongoing service delivery, management and financing at appropriate scales. We are seeking to better understand the characteristics of such systems, and to examine how and why they may emerge in particular operating contexts.Through working with utilities establishing new systems for non-sewered sanitation we are trying to understand the drivers and barriers at the institutional level for delivery of safe sanitation services.
Reducing exposure to faecal pathogens
The sanitation development imperative is predicated in part upon the rational hypothesis that a safely managed sanitation system will substantially reduce exposure to human faecal pathogens and therefore will reduce excreta-related disease. In practice, quantifiable health impact resulting from sanitation interventions is elusive, probably because of incomplete achievement of a hygienic living environment in most low income community settings, in particular where livestock share domestic space. We are interested in the development of new, practical tools and products which will, at a household level, help mothers keep their children healthy. but aAt a higher level we are interested in developing new approaches which use readily-available spatial information to map faecal flows and identify information help planners and will help decision-makers with the identification identify hotof hot spots of faecal contamination in neighbourhoods as a precursor to prioritised decision-making.
Using fundamental research to inform development of new and existing water and sanitation technologies
It is important to understand the science of new and existing sanitation and water resource technologies on a fundamental level in order to continue their innovative development. In the soil and water chemistry laboratories at Cranfield University we are applying rigorous scientific testing to analyse how environmental, geogenic, and anthropogenic factors influence the underlying biological, chemical and physical processes in sanitation and water systems. Advanced chemical analysis of field samples and exploration of contaminant migration and dissolved-solid interface interactions using column and batch experiments improves our understanding of site characteristics to maximize the efficiency and effectiveness of water resource development and contamination management.
Hazard assessment and climate change
We are working to identify and understand the dynamics and effects of rising challenges in the fields of water and sanitation. Emerging contaminants are an increasing area of concern, and we are examining how behaviour and practice of water users influences exposure to emerging contaminants, and how these behaviours affect our ability to mitigate the effects of said exposure. Climate change also poses new challenges of particular interest within the WASH community, because of the increased risk of droughts and floods, both of which dramatically impact water quality, safety, and availability. These issues of water security haveserious implications for the livelihoods of rural subsistence farmers, and we are mapping vulnerabilities and innovative pathways of water use among households to improve the resilience of communities to climate risk. Our work focuses on developing novel methods and conceptual frameworks for assessing environmental sustainability and resilience in WASH programmes.
Circular economy
Simply put, the circular economy (CE) is a model of production where materials follow cycles of repeated use, in comparison to the linear economy where materials are extracted, used once, and become waste. The CE has gained momentum in recent years to address issues created by the linear economy - not only waste but also climate change and depletion of soil. However, system-wide changes, including technological innovation, and social and institutional change, are needed for the CE to be realised for sanitation as in other areas.
We have not made full use of the biological cycle (e.g., biomass and food) but have extensively used the technical cycle (e.g., minerals and fossils). We are therefore researching the decision-making processes that would drive more appropriate resource use. Another aspect of our work addresses social perceptions that form a barrier to the uptake of the CE in the water sector. We use institutional theory to better understand the CE’s legitimacy. In practice, this can prompt different stakeholders such as companies and local authorities to adopt circular initiatives and promote public outreach and engagement practices.
Spatial aspects of sanitation
Sanitation service provision in low-and-middle income countries is inherently unequal in part due to lack of standard sewage infrastructure and individual management of on-site sanitation. Spatial representation of sanitation services is therefore essential for financial and technical planning. The aim of our work is to address this challenge by using GIS and free and open datasets to understand both af faecal mobility and the sanitation services that keep waste safely contained and transported.
Recent relevant publications
- Parker AH, Nyangoka J, Rodrigues I, Yadav B, Le Corre KS, Campo P & Quinn R (2022) The multiple uses of water derived from managed aquifer recharge systems in Kenya and India, Journal of Water, Sanitation and Hygiene for Development, 12 (2) 208-216.
- Ferguson C, Mallory A, Anciano F, Russell K, Valladares HD, Riungu J & Parker A (2022) A qualitative study on resource barriers facing scaled container-based sanitation service chains, Journal of Water, Sanitation and Hygiene for Development, Available online 22 February 2022.
- Mallory A, Mdee A, Agol D, Hyde-Smith L, Kiogora D, Riungu J & Parker A (2022) The potential for scaling up container-based sanitation in informal settlements in Kenya, Journal of International Development, Available online 21 February 2022.
- Hutchings P, Cooper S, Butterworth J, Joseph S, Kebede A, Parker A, Terefe B & Van Koppen B (2022) Water and emotion: testing a new approach for monitoring water security among Afar pastoralists in Ethiopia, Frontiers in Climate, 3 Article No. 753888. Dataset/s: 10.17862/cranfield.rd.9332279
- Ferguson C, Mallory A, Hutchings P, Remington C, Lloyd E, Kiogora D, Anciano F & Parker A (2021) An evaluation of different provision strategies for scaled-up container-based sanitation, H2Open Journal, 4 (1) 216-230. Dataset/s: 10.17862/cranfield.rd.14495961
- Mnthambala F, Tilley E, Tyrrel S & Sakrabani R (2021) Phosphorus flow analysis for Malawi: Identifying potential sources of renewable phosphorus recovery, Resources, Conservation and Recycling, 173 (October) Article No. 105744. Dataset/s: 10.17862/cranfield.rd.14790090
- Budge S, Hutchings P, Parker A, Tyrrel S, Norton S, Garbutt C, Woldemedhin F, Jemal MY, Moges M, Hussen S & Beyene H (2021) A randomised controlled feasibility trial of a BabyWASH household playspace: the CAMPI study, PLoS Neglected Tropical Diseases, 15 (7) Article No. e0009514. Dataset/s: 10.17862/cranfield.rd.14877831
- Ritchie H, Eisma JA & Parker A (2021) Sand dams as a potential solution to rural water security in drylands: existing research and future opportunities, Frontiers in Water, 3 Article No. 651954.
- Budge S, Parker A, Hutchings P, Garbutt C, Rosenbaum J, Tulu T, Woldemedhin F, Jemal M, Engineer B & Williams L (2021) Multi-sectoral participatory design of a babyWASH playspace for rural Ethiopian households, American Journal of Tropical Medicine and Hygiene, 104 (3) 884-897.
- Willcock S, Parker A, Wilson C, Brewer T, Bundhoo D, Cooper S, Lynch K, Mekala S, Mishra PP, Rey D, Welivita I, Venkatesh K & Hutchings P (2021) Nature provides valuable sanitation services, One Earth, 4 (2) 192-201.
- Holm RH, Chunga BA, Mallory A, Hutchings P & Parker A (2021) A qualitative study of NIMBYism for waste in smaller urban areas of a low-income country, Mzuzu, Malawi, Environmental Health Insights, 15 (January) 1-11.
- Mallory A, Omoga L, Kiogora D, Riungu J, Kagendi D & Parker A (2021) Understanding the role of informal pit emptiers in sanitation in Nairobi through case studies in Mukuru and Kibera settlements, Journal of Water, Sanitation and Hygiene for Development, 11 (1) 51-59.
- Hafizah H, Parker A & Pollard SJ (2021) Whither regulation, risk and water safety plans? Case studies from Malaysia and from England and Wales, Science of the Total Environment, 755, Part 1 (February) Article No. 142868. Dataset/s: 10.17862/cranfield.rd.13026533
- Hennigs J, Ravndal KT, Parker A, Collins M, Jiang Y, Kolios AJ, McAdam E, Williams L & Tyrrel S (2021) Faeces - Urine separation via settling and displacement: Prototype tests for a novel non-sewered sanitation system, Science of the Total Environment, 753 (January) Article No. 141881.
- Mallory A, Holm R & Parker A (2020) A review of the financial value of faecal sludge reuse in low-income countries, Sustainability, 12 (20) Article No. 8334.
- Shafiq Y, Haigh S, Holm R & Parker A (2020) Re-evaluating the strength of pit-latrine faecal sludge from dynamic cone penetrometer test data, Water SA, 46 (4) 638-644.
- Mnthambala F, Tilley E, Tyrrel S & Sakrabani R (2021) Phosphorus flow analysis for Malawi: Identifying potential sources of renewable phosphorus recovery, Resources, Conservation and Recycling, 173 (October) Article No. 105744. Dataset/s: 10.17862/cranfield.rd.14790090
- Hylton E, Noad L, Templeton MR & Sule MN (2020) The rate of vermi-compost accumulation within ‘Tiger Toilets’ in India, Environmental Technology, Available online 13 Jul 2020 (3).
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The CWSI had been on my radar since I became interested in water treatment during my bachelor's studies, and after my master's I knew I wanted to work in WASH. Being part of the NMT-project allows me to do that on a scale of potentially global impact, while working with people doing all sorts of exciting water-related research.
Jan Hennings, WASH PhD Graduate