Functional properties of soils formed from biochemical ripening of dredged sediments—subsidence mitigation in delta areas

Bruna R.F. Oliveira, Martijn P.J. Smit, Leon van Paassen, Tim C. Grotenhuis, Huub H.M. Rijnaarts

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose: In delta areas, dense networks of canals have been developed through time and have to be periodically dredged. Lowering the groundwater level in delta areas deepens the aerobic zone, leading to the oxidation of organic matter and possibly to land subsidence. The use of the dredged sediments on land can be a solution to mitigate land subsidence in delta areas. Materials and methods: Five types of dredged sediments with different organic matter content and particle size distribution were dewatered for 7 days and then submitted to biochemical ripening during 141 days on a laboratorial scale with constant temperature and relative humidity. The functional properties analysed were the type and content of organic matter, pH, total C, N, P and S, dry bulk density, water retention capacity, aggregate stability and load-bearing capacity. Results and discussion: After biochemical ripening, there was no significant loss in the mass of organic matter but there was an increase in the fraction of stable organic compounds, observed by an increase in oxygen-bearing compounds and a decrease in hydrocarbons during biochemical ripening. The pH was not affected by biochemical ripening, and the total C, N, P and S concentrations are high and therefore the dredged sediments can improve the quality of the land. Most volume lost during dewatering and biochemical ripening can be attributed to the loss of water. The water retention capacity of the dredged sediments changed with biochemical ripening. The soils formed from biochemical ripening have very stable aggregates, and its load-bearing capacity is enough to sustain cattle and tractors. Conclusions: Most volume lost during dewatering and biochemical ripening can be attributed to the loss of water and not organic matter. Therefore, the studied dredged sediments have potential to mitigate land subsidence in delta areas when spread on land.

Original languageEnglish (US)
Pages (from-to)286-298
Number of pages13
JournalJournal of Soils and Sediments
Volume17
Issue number1
DOIs
StatePublished - Jan 1 2017
Externally publishedYes

Fingerprint

ripening
mitigation
organic matter
soil
subsidence
sediment
water retention
dewatering
aggregate stability
dry density
bulk density
canal
land
relative humidity
cattle
organic compound
particle size
hydrocarbon
oxidation
water

Keywords

  • Beneficial use
  • Biochemical ripening
  • Dredged sediments
  • Land subsidence

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Stratigraphy

Cite this

Functional properties of soils formed from biochemical ripening of dredged sediments—subsidence mitigation in delta areas. / Oliveira, Bruna R.F.; Smit, Martijn P.J.; van Paassen, Leon; Grotenhuis, Tim C.; Rijnaarts, Huub H.M.

In: Journal of Soils and Sediments, Vol. 17, No. 1, 01.01.2017, p. 286-298.

Research output: Contribution to journalArticle

Oliveira, Bruna R.F. ; Smit, Martijn P.J. ; van Paassen, Leon ; Grotenhuis, Tim C. ; Rijnaarts, Huub H.M. / Functional properties of soils formed from biochemical ripening of dredged sediments—subsidence mitigation in delta areas. In: Journal of Soils and Sediments. 2017 ; Vol. 17, No. 1. pp. 286-298.
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AU - Oliveira, Bruna R.F.

AU - Smit, Martijn P.J.

AU - van Paassen, Leon

AU - Grotenhuis, Tim C.

AU - Rijnaarts, Huub H.M.

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N2 - Purpose: In delta areas, dense networks of canals have been developed through time and have to be periodically dredged. Lowering the groundwater level in delta areas deepens the aerobic zone, leading to the oxidation of organic matter and possibly to land subsidence. The use of the dredged sediments on land can be a solution to mitigate land subsidence in delta areas. Materials and methods: Five types of dredged sediments with different organic matter content and particle size distribution were dewatered for 7 days and then submitted to biochemical ripening during 141 days on a laboratorial scale with constant temperature and relative humidity. The functional properties analysed were the type and content of organic matter, pH, total C, N, P and S, dry bulk density, water retention capacity, aggregate stability and load-bearing capacity. Results and discussion: After biochemical ripening, there was no significant loss in the mass of organic matter but there was an increase in the fraction of stable organic compounds, observed by an increase in oxygen-bearing compounds and a decrease in hydrocarbons during biochemical ripening. The pH was not affected by biochemical ripening, and the total C, N, P and S concentrations are high and therefore the dredged sediments can improve the quality of the land. Most volume lost during dewatering and biochemical ripening can be attributed to the loss of water. The water retention capacity of the dredged sediments changed with biochemical ripening. The soils formed from biochemical ripening have very stable aggregates, and its load-bearing capacity is enough to sustain cattle and tractors. Conclusions: Most volume lost during dewatering and biochemical ripening can be attributed to the loss of water and not organic matter. Therefore, the studied dredged sediments have potential to mitigate land subsidence in delta areas when spread on land.

AB - Purpose: In delta areas, dense networks of canals have been developed through time and have to be periodically dredged. Lowering the groundwater level in delta areas deepens the aerobic zone, leading to the oxidation of organic matter and possibly to land subsidence. The use of the dredged sediments on land can be a solution to mitigate land subsidence in delta areas. Materials and methods: Five types of dredged sediments with different organic matter content and particle size distribution were dewatered for 7 days and then submitted to biochemical ripening during 141 days on a laboratorial scale with constant temperature and relative humidity. The functional properties analysed were the type and content of organic matter, pH, total C, N, P and S, dry bulk density, water retention capacity, aggregate stability and load-bearing capacity. Results and discussion: After biochemical ripening, there was no significant loss in the mass of organic matter but there was an increase in the fraction of stable organic compounds, observed by an increase in oxygen-bearing compounds and a decrease in hydrocarbons during biochemical ripening. The pH was not affected by biochemical ripening, and the total C, N, P and S concentrations are high and therefore the dredged sediments can improve the quality of the land. Most volume lost during dewatering and biochemical ripening can be attributed to the loss of water. The water retention capacity of the dredged sediments changed with biochemical ripening. The soils formed from biochemical ripening have very stable aggregates, and its load-bearing capacity is enough to sustain cattle and tractors. Conclusions: Most volume lost during dewatering and biochemical ripening can be attributed to the loss of water and not organic matter. Therefore, the studied dredged sediments have potential to mitigate land subsidence in delta areas when spread on land.

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