Knowra Peatland drainage Peatland drainage Peatland drainage is the removal of water from peat soils, usually by ditches or pumping, to enable land use or peat extraction. It exposes stored organic matter to oxygen and alters peatland hydrology.
Water table : The upper boundary of groundwater-saturated soil or rock. Drainage lowers this boundary, exposing deeper peat to air.
Carbon dioxide emissions : The release of carbon dioxide into the atmosphere from natural processes and human activities. Oxidation of drained peat is a major source of these emissions.
Agriculture : The cultivation of crops and raising of livestock for food, fiber, and other products. Drainage makes some peat soils usable for crops and pasture.
Paludiculture : The productive use of wet or rewetted peatlands for crops adapted to high water levels. It supports production without requiring conventional deep drainage.
Peat oxidation : The decomposition of peat carbon through reactions with oxygen, releasing carbon dioxide. Lower water levels allow oxygen to reach peat that was previously saturated.
Peatland restoration : The repair of damaged peatland conditions, often by raising water levels and restoring vegetation. Rewetting reverses some hydrological effects of drainage, though recovery can take time.
Forestry : The management and use of forests, including planting, harvesting, and conservation. Plantation forestry has relied on drainage to establish trees on wet peat.
Rewetting : The raising of water levels in drained wetlands by blocking drains or other measures. It directly opposes the water-level lowering that defines drainage.
Subsidence : The downward settling of the land surface caused by loss of support or volume beneath it. Drained peat shrinks and decomposes, lowering the ground surface.
Biodiversity loss : The decline in the variety and abundance of living organisms in a place or across the planet. Drainage replaces wet peatland conditions with habitats that support different, often fewer, specialist species.
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