LOOP
How can we leverage natural processes to restore the native vegetation in the Mataniko River and minimise the negative impacts of human waste from informal settlements?
LOOP proposes a micro-scale design and approach to the wetlands, allowing a series of filters to be constructed in settlements to improve environmental outcomes in the surrounding areas while supporting food production without negatively impacting the plants and animals in the ecosystem.
Uncovered the complex relationship between human and natural systems, particularly solid and human waste generation and its impact on the environment
The micro-scale design of wastewater treatment goes through a series of filtrations that improve the environmental outcomes in the surrounding areas.
Outcomes
Approach
More-than-human • Nature-based solutions • Evidence-based research
Methodology
System thinking and mapping tools • Paper and rapid prototyping • 3D modelling • Technical drawing
The Mataniko River in Honiara, Solomon Island is prone to natural disasters, human intrusion and activities. In a valley, a creek, that is a tributary of the river, at the southernmost edge of Honiara’s urban extent- characterised by steep slopes inhabits untenured urban migrants. Solid and human waste from these informal settlements has polluted the river heavily.
Mapping the human and natural systems in the Mataniko River
LOOP: Micro-scale design of wastewater treatment
The micro-scale design of wastewater treatment goes through a series of filtrations that improve the environmental outcomes in the surrounding areas. Understanding that these settlements are found on slopes, leading to soil degradation, causing landslides and banks to break - the terracing technology combined with the engineered system of constructed wetlands helps stabilise the soil, protect settlements from gravitational hazards and increase vegetation in the area. The excess harvest from the treatment zones can be used as fertilisers in food gardens or as animal feeds. To maximise the outputs of these constructed wetlands, treated water can be reused for sanitation or water gardening. At this stage of treatment, vegetables and fish can be grown, making them edible for human consumption. This ensures food supply in the settlements.
Design approach and criteria for the prototype
Designing for more-than-human
Looking through the lens of the Mataniko River, the project investigated nature-based solutions as an approach to address socio-ecological issues. Leveraging natural filtration processes and endemic species, LOOP proposed a sanitation facility using constructed wetlands catering to one household with seven people. Optimising the features of nature, delivering high-impact benefits. The prototype is a solution towards improved sanitation and ecological outcomes in underserved communities. LOOP hopes to reimagine in a way in which waste is a valuable resource.
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