Linking soil quality and water quality to low and high N-pressure catchments
Project Details Ngā taipitopito
Collaborators Ngā haumi
Manaaki Whenua Landcare Research
Land use pressure affects soil and water quality in catchments.
This research will link soil quality metrics to indicators of land use pressure, such as stock numbers and nitrogen loss, to identify differences between dominant land uses and detect trends.
Soil quality will also be linked to water quality indicators, such as nitrogen or suspended sediment, considering lag times where possible.
This research is the first attempt at this scale to directly link soil quality, to land use pressure over time, to water quality response. It will focus on the catchments with the greatest total nitrogen, and the catchments with the least total nitrogen (assessed through modelling).
The research makes use of existing soil and water quality data for Aotearoa: data on land use and management (including from 1990–2018 at a 30-by-30km grid); soil quality monitoring data; and water quality data for about 700 catchments.