Hydraulic properties of peat soils along a bulk density gradient-A meta study

被引:95
|
作者
Liu, Haojie [1 ]
Lennartz, Bernd [1 ]
机构
[1] Univ Rostock, Fac Agr & Environm Sci, Justus von Liebig Weg 6, D-18059 Rostock, Germany
关键词
hydraulic properties; Mualem-van Genuchten model; peat soil; pedotransfer functions; PHYSICAL-PROPERTIES; PORE-SIZE; HYDROLOGICAL PROPERTIES; PEDOTRANSFER FUNCTIONS; TRANSPORT-PROPERTIES; COMPUTED-TOMOGRAPHY; MOISTURE RETENTION; SOLUTE TRANSPORT; SPHAGNUM MOSS; NEW-MODEL;
D O I
10.1002/hyp.13314
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Our understanding of hydraulic properties of peat soils is limited compared with that of mineral substrates. In this study, we aimed to deduce possible alterations of hydraulic properties of peat soils following degradation resulting from peat drainage and aeration. A data set of peat hydraulic properties (188 soil water retention curves [SWRCs], 71 unsaturated hydraulic conductivity curves [UHCs], and 256 saturated hydraulic conductivity [K-s] values) was assembled from the literature; the obtained data originated from peat samples with an organic matter (OM) content ranging from 23 to 97 wt% (weight percent; and according variation in bulk density) representing various degrees of peat degradation. The Mualem-van Genuchten model was employed to describe the SWRCs and UHCs. The results show that the hydraulic parameters of peat soils vary over a wide range confirming the pronounced diversity of peat. Peat decomposition significantly modifies all hydraulic parameters. A bulk density of approximately 0.2 g cm(-3) was identified as a critical threshold point; above and below this value, macroporosity and hydraulic parameters follow different functions with bulk density. Pedotransfer functions based on physical peat properties (e.g., bulk density and soil depth) separately computed for bog and fen peat have significantly lower mean square errors than functions obtained from the complete data set, which indicates that not only the status of peat decomposition but also the peat-forming plants have a large effect on hydraulic properties. The SWRCs of samples with a bulk density of less than 0.2 g cm(-3) could be grouped into two to five classes for each peat type (botanical composition). The remaining SWRCs originating from samples with a bulk density of larger than 0.2 g cm(-3) could be classified into one group. The Mualem-van Genuchten parameter values of alpha can be used to estimate K-s if no K-s data are available. In conclusion, the derived pedotransfer functions provide a solid instrument to derive hydraulic parameter values from easily measurable quantities; however, additional research is required to reduce uncertainty.
引用
收藏
页码:101 / 114
页数:14
相关论文
共 50 条
  • [31] EFFECT OF BULK-DENSITY AND HUMUS CONTENT ON PORE-SIZE DISTRIBUTION AND HYDRAULIC CONDUCTIVITY IN SANDY SOILS
    SCHINDLER, U
    ARCHIV FUR ACKER UND PFLANZENBAU UND BODENKUNDE-ARCHIVES OF AGRONOMY AND SOIL SCIENCE, 1989, 33 (01): : 3 - 9
  • [32] Density functional study of graphite bulk and surface properties
    Ooi, N
    Rairkar, A
    Adams, JB
    CARBON, 2006, 44 (02) : 231 - 242
  • [33] Physical properties of forest soils along a fly-ash deposition gradient in Northeast Germany
    Hartmann, Peter
    Fleige, Heiner
    Horn, Rainer
    GEODERMA, 2009, 150 (1-2) : 188 - 195
  • [34] Chemical properties of forest soils along a fly-ash deposition gradient in eastern Germany
    Susanne Klose
    Franz Makeschin
    European Journal of Forest Research, 2004, 123 : 3 - 11
  • [35] Chemical properties of forest soils along a fly-ash deposition gradient in eastern Germany
    Klose, S
    Makeschin, F
    EUROPEAN JOURNAL OF FOREST RESEARCH, 2004, 123 (01) : 3 - 11
  • [36] Effect of Gypsum, Cover Crop, and Crop Rotation on Bulk Density and Aggregate Properties of Soils
    Shedekar, V. S.
    Watts, D. B.
    Islam, K. R.
    Raut, Y.
    Gonzalez, J. M.
    Dick, W. A.
    Fausey, N. R.
    Flanagan, D. C.
    Reeder, R. C.
    Vantoai, T.
    Batte, M. T.
    COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 2025, 56 (06) : 825 - 840
  • [37] Variation of soil organic carbon and bulk density during afforestation regulates soil hydraulic properties
    GU Feng
    CHEN Xue-jiao
    SU Zheng-an
    ZHANG Xin-bao
    ZHOU Ming-hua
    Journal of Mountain Science, 2022, 19 (08) : 2322 - 2332
  • [38] Effects of petroleum hydrocarbon concentration and bulk density on the hydraulic properties of lean oil sand overburden
    Pernitsky, Trent
    Hu, Wei
    Si, Bing Cheng
    Barbour, Lee
    CANADIAN JOURNAL OF SOIL SCIENCE, 2016, 96 (04) : 435 - 446
  • [39] Variation of soil organic carbon and bulk density during afforestation regulates soil hydraulic properties
    Gu Feng
    Chen Xue-jiao
    Su Zheng-an
    Zhang Xin-bao
    Zhou Ming-hua
    JOURNAL OF MOUNTAIN SCIENCE, 2022, 19 (08) : 2322 - 2332
  • [40] Variation of soil organic carbon and bulk density during afforestation regulates soil hydraulic properties
    Feng Gu
    Xue-jiao Chen
    Zheng-an Su
    Xin-bao Zhang
    Ming-hua Zhou
    Journal of Mountain Science, 2022, 19 : 2322 - 2332