Systemic land degradation and colonial land-use intensify NZ landslides—tech alone cannot resolve structural vulnerability

Māori land management practices, such as rongoā (traditional medicine) forests and kaitiakitanga (guardianship), historically maintained slope stability through diverse, low-impact agriculture and riparian planting. Colonial land confiscations (e.g., the 1860s New Zealand Settlements Act) disrupted these systems, replacing them with monoculture pine plantations and pastoral farming that increase erosion. Contemporary Māori-led restoration projects, like those in Te Urewera, show how indigenous knowledge can reduce landslide risks while addressing cultural loss.

New Zealand’s landslide crisis mirrors historical patterns in other settler-colonial nations, where deforestation for agriculture and timber exports led to catastrophic soil erosion (e.g., the 1930s Dust Bowl in the U.S. or the 19th-century deforestation of Java). The 1950s ‘Great North Island Landslide’ in NZ, linked to post-war land development, foreshadowed today’s disasters, yet its lessons were ignored in favor of short-term economic growth. The 1980s neoliberal reforms further eroded environmental protections, privatizing land and weakening local governance—conditions that persist today.

In the Philippines, indigenous Lumad communities use contour farming and bamboo terracing to stabilize slopes, practices that have been eroded by mining and agribusiness expansion. Himalayan communities in Nepal and India rely on community forestry to manage landslide risks, a model that contrasts with NZ’s top-down disaster management. Pacific Island nations, facing similar climate pressures, emphasize customary land tenure as a buffer against displacement, a concept NZ has yet to fully integrate despite its Treaty obligations.

Climate change intensifies rainfall patterns, increasing the frequency of extreme weather events that trigger landslides, but the relationship is mediated by land-use practices. Studies show that deforestation and urbanization can amplify landslide risks by 3-5 times compared to forested areas, regardless of climate trends. NZ’s geological vulnerability (e.g., weak sedimentary rocks and steep terrain) is exacerbated by intensive farming and logging, which reduce soil cohesion. Emerging technologies like LiDAR and AI-driven risk modeling are valuable but must be paired with ecological restoration to be effective.

Māori art and waiata (songs) often encode warnings about land misuse, such as the whakataukī (proverb) ‘He aha te mea nui o te ao? He tangata, he tangata, he tangata’ (What is the most important thing in the world? It is people, it is people, it is people)—a reminder of humanity’s interdependence with land. Contemporary Māori artists like Lisa Reihana and Brett Graham use their work to critique extractive industries and envision alternative relationships with the environment. In Japanese haiku and sumi-e art, landslides are depicted as moments of harmony disrupted, reflecting a spiritual understanding of nature’s agency.

Scenario modeling suggests that without radical land-use changes, NZ’s landslide risks could increase by 40% by 2050, with disproportionate impacts on low-income and Māori communities. Adaptation strategies must prioritize ecosystem-based solutions, such as rewilding critical slopes and restoring native forests, which can reduce erosion by up to 70%. Technological solutions (e.g., early warning systems) are necessary but insufficient without addressing the root causes of vulnerability, including land tenure inequities and climate injustice.

Māori communities in Tairāwhiti and Bay of Plenty have long warned about the risks of deforestation and intensive farming, yet their knowledge is sidelined in favor of Western scientific and corporate solutions. Women, who often bear the brunt of disaster recovery, are underrepresented in decision-making processes, despite their critical role in community resilience. Rural and low-income populations lack access to resources for relocation or adaptation, forcing them into high-risk areas. The framing of landslides as a ‘natural disaster’ obscures the political and economic forces that concentrate risk in marginalized communities.