TY - JOUR
T1 - Subsidence of organic dredged sediments in an upland deposit in Wormer- en Jisperveld
T2 - North Holland, the Netherlands
AU - Oliveira, Bruna R.F.
AU - Smit, Martijn P.J.
AU - Veld, Harry
AU - van Paassen, Leon A.
AU - Rijnaarts, Huub H.M.
AU - Grotenhuis, Tim
N1 - Funding Information:
Acknowledgements This research is supported by the Dutch Technology Foundation STW, which is part of the Netherlands Organisation for Scientific Research (NWO), and which is partly funded by the Ministry of Economic Affairs via the perspective program BioGeoCivil (Grant 11344). We would like to express gratitude to Karsten Hopman from Hoogheemraadschap Hollands Noorderkwartier (HHNK) for the vital support with the field experiment and to Roderick Tollenaar for all the support.
Publisher Copyright:
© 2018, The Author(s).
PY - 2018/2/1
Y1 - 2018/2/1
N2 - Land subsidence in low-lying peatlands can be caused by shrinkage and organic matter oxidation. When these areas have networks of ditches and canals for drainage purposes, the sediments that accumulate in the waterways can be used to reverse the process of land subsidence. The objective of this study is to understand how dredged sediments can be used to reverse the process of land subsidence by analysing the contribution of shrinkage and organic matter mineralization to the subsidence observed in an upland deposit. A deposit of dredged sediments in the Wormer- en Jisperveld—North Holland, the Netherlands—was characterized during 17 months in terms of subsidence of the sediments, subsidence of the soil underlying the deposit, geotechnical water content, organic matter content, type of organic matter and nutrients. The deposit was filled to a height of 195 cm, and after 17 months, the subsidence of the sediments was 88 cm. In addition, a subsidence of 19.5 cm of the underlying soil was observed. Subsidence could be attributed to shrinkage since no significant changes in the organic matter content and total organic carbon were observed. The type of organic matter changed in the direction of humification until winter 2014, stabilized from winter 2014 to spring 2015 and changed in the direction of mineralization after the spring of 2015. Subsidence of dredged sediments in upland deposits is caused by shrinkage during the first 17 months. The solution of spreading thinner layers of sediments over the land to decrease the subsidence rates should be explored since the pressure of the deposit on the underlying soil caused an extra subsidence of 19.5 cm.
AB - Land subsidence in low-lying peatlands can be caused by shrinkage and organic matter oxidation. When these areas have networks of ditches and canals for drainage purposes, the sediments that accumulate in the waterways can be used to reverse the process of land subsidence. The objective of this study is to understand how dredged sediments can be used to reverse the process of land subsidence by analysing the contribution of shrinkage and organic matter mineralization to the subsidence observed in an upland deposit. A deposit of dredged sediments in the Wormer- en Jisperveld—North Holland, the Netherlands—was characterized during 17 months in terms of subsidence of the sediments, subsidence of the soil underlying the deposit, geotechnical water content, organic matter content, type of organic matter and nutrients. The deposit was filled to a height of 195 cm, and after 17 months, the subsidence of the sediments was 88 cm. In addition, a subsidence of 19.5 cm of the underlying soil was observed. Subsidence could be attributed to shrinkage since no significant changes in the organic matter content and total organic carbon were observed. The type of organic matter changed in the direction of humification until winter 2014, stabilized from winter 2014 to spring 2015 and changed in the direction of mineralization after the spring of 2015. Subsidence of dredged sediments in upland deposits is caused by shrinkage during the first 17 months. The solution of spreading thinner layers of sediments over the land to decrease the subsidence rates should be explored since the pressure of the deposit on the underlying soil caused an extra subsidence of 19.5 cm.
KW - Dredged sediments
KW - Lowlands
KW - Organic matter oxidation
KW - Peatlands
KW - Shrinkage
KW - Subsidence
KW - Upland deposit
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U2 - 10.1007/s12665-018-7272-2
DO - 10.1007/s12665-018-7272-2
M3 - Article
AN - SCOPUS:85042085016
SN - 1866-6280
VL - 77
JO - Environmental Geology and Water Sciences
JF - Environmental Geology and Water Sciences
IS - 4
M1 - 131
ER -