Long-term drainability of and water management in peat soil areas. - (:unkn) unknown
This paper briefly discusses the concept of long-term drainability of peat soil vis-a-vis the phenomenon of subsidence, and the importance of water management. An important effect of draining peat soils is the subsidence of peat surface. Subsidence is as a result of. consolidation, oxidation and shrinkage of the organic materials after drainage improvement. The continual lowering of the peat surface may cause some areas that can be drained initially to become undrainable by gravity after a number of years of drainage. Thus, the single most significant factor affecting the potential to develop a peat soil area is its long-term drainability. As long as the peat soil is artificially drained and the surface layer remains above the water table, subsidence of the exposed layer could not be stopped. However, it could be minimised or controlled by good water management. By minimising the rafe of subsidence, the economic lije span of a reclaimed peat soil area could be prolonged. Hence, good water management would go a long way to contribute towards the "wise use" of the reclaimed tropical peatlands. Good water management starts with the design and the installation of a good drainage system. The design of the drainage system should be guided by the underlying principle that peat is a precious soil resource that must be properly managed to prolong its life. The life span of peat can be prolonged only if there is a shift from the removal of excess water to the control of the water table. Controlling the water table requires integrated water management, which is a combination of drainage, water conservation and where possible, sub-irrigation or inverse drainage.
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This paper briefly discusses the concept of long-term drainability of peat soil vis-a-vis the phenomenon of subsidence, and the importance of water management. An important effect of draining peat soils is the subsidence of peat surface. Subsidence is as a result of. consolidation, oxidation and shrinkage of the organic materials after drainage improvement. The continual lowering of the peat surface may cause some areas that can be drained initially to become undrainable by gravity after a number of years of drainage. Thus, the single most significant factor affecting the potential to develop a peat soil area is its long-term drainability. As long as the peat soil is artificially drained and the surface layer remains above the water table, subsidence of the exposed layer could not be stopped. However, it could be minimised or controlled by good water management. By minimising the rafe of subsidence, the economic lije span of a reclaimed peat soil area could be prolonged. Hence, good water management would go a long way to contribute towards the "wise use" of the reclaimed tropical peatlands. Good water management starts with the design and the installation of a good drainage system. The design of the drainage system should be guided by the underlying principle that peat is a precious soil resource that must be properly managed to prolong its life. The life span of peat can be prolonged only if there is a shift from the removal of excess water to the control of the water table. Controlling the water table requires integrated water management, which is a combination of drainage, water conservation and where possible, sub-irrigation or inverse drainage.
Keywords: Drenaje; Ordenación de aguas.; Suelo de turba