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RESEARCH ARTICLE

Uncertainty in predicting the spatial pattern of soil water temporal stability at the hillslope scale

K. Liao A C , X. Lai A , L. Lv B and Q. Zhu A C
+ Author Affiliations
- Author Affiliations

A Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.

B School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China.

C Corresponding authors. Email: khliao@niglas.ac.cn; qzhu@niglas.ac.cn

Soil Research 54(6) 739-748 https://doi.org/10.1071/SR15059
Submitted: 23 February 2015  Accepted: 18 December 2015   Published: 25 July 2016

Abstract

Soil water temporal stability is subject to spatial variation, which influences the prediction of mean soil water status on a hillslope. However, estimation of the spatial pattern of soil water temporal stability and quantification of the uncertainties associated with the predictions are often ignored. In this study, volumetric soil water contents at 10 and 30 cm depths on tea garden and forest hillslopes were monitored across 17 dates from January 2013 to April 2014. Soil moisture maps on these 17 dates were interpolated using ordinary kriging and then the spatial distribution of the relative difference of soil moisture was assessed. Based on these maps, standard deviations of relative difference (SDRD) of soil moisture were calculated to represent the spatial variation of soil water temporal stability. Uncertainties in predicted patterns of SDRD due to the limited number of sampling days used for calculating SDRD (U1) and for spatial interpolation of soil moisture by ordinary kriging (U2) were investigated using bootstrap and sequential Gaussian simulation techniques respectively. Results showed that soil water content on the forest hillslope generally exhibited stronger spatial variability than that on the tea garden hillslope. The SDRD substantially varied in space at the hillslope scale. Temporal stabilities of soil water content at 30 cm depth were significantly (P < 0.05) stronger than those at 10 cm soil depth, regardless of the land use type. However, differences in soil water temporal stabilities on these two land use hillslopes were not significant. In addition, U2 was generally more important than U1 on both hillslopes. This suggests that additional sampling sites and more robust interpolation methods rather than additional sampling days should be developed to reduce SDRD prediction uncertainty on the study hillslopes.

Additional keywords: bootstrap, sequential Gaussian simulation, soil water content, temporal stability, uncertainty analysis.


References

Bourennane H, King D, Couturier A, Nicoullaud B, Mary B, Richard G (2007) Uncertainty assessment of soil water content spatial patterns using geostatistical simulations: An empirical comparison of a simulation accounting for single attribute and a simulation accounting for secondary information. Ecological Modelling 205, 323–335.
Uncertainty assessment of soil water content spatial patterns using geostatistical simulations: An empirical comparison of a simulation accounting for single attribute and a simulation accounting for secondary information.Crossref | GoogleScholarGoogle Scholar |

Brocca L, Melone F, Moramarco T, Morbidelli R (2009) Soil moisture temporal stability over experimental areas in Central Italy. Geoderma 148, 364–374.
Soil moisture temporal stability over experimental areas in Central Italy.Crossref | GoogleScholarGoogle Scholar |

Cassel DK, Wendroth O, Nielsen DR (2000) Assessing spatial variability in an agricultural experiment station field: opportunities arising from spatial dependence. Agronomy Journal 92, 706–714.
Assessing spatial variability in an agricultural experiment station field: opportunities arising from spatial dependence.Crossref | GoogleScholarGoogle Scholar |

Chai X, Huang Y, Yuan X (2007) Accuracy and uncertainty of spatial patterns of soil organic matter. New Zealand Journal of Agricultural Research 50, 1141–1148.
Accuracy and uncertainty of spatial patterns of soil organic matter.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXhtVCnt7bM&md5=ab3960acaa3c54ffd9c22bab8b93f539CAS |

Chirico GB, Medina H, Romano N (2007) Uncertainty in predicting soil hydraulic properties at the hillslope scale with indirect methods. Journal of Hydrology 334, 405–422.
Uncertainty in predicting soil hydraulic properties at the hillslope scale with indirect methods.Crossref | GoogleScholarGoogle Scholar |

Comegna V, Basile A (1994) Temporal stability of spatial patterns of soil water storage in a cultivated Vesuvian soil. Geoderma 62, 299–310.
Temporal stability of spatial patterns of soil water storage in a cultivated Vesuvian soil.Crossref | GoogleScholarGoogle Scholar |

De Lannoy GJM, Verhoest NEC, Houser PR, Gish TJ, Meirvenne MV (2006) Spatial and temporal characteristics of soil moisture in an intensively monitored agricultural field (OPE3). Journal of Hydrology 331, 719–730.
Spatial and temporal characteristics of soil moisture in an intensively monitored agricultural field (OPE3).Crossref | GoogleScholarGoogle Scholar |

Efron B, Tibshirani RJ (1993) ‘An introduction to the bootstrap. Monographs on Statistics and Applied Probability, vol. 57.’ (Chapman and Hall: London, UK)

Grayson RB, Western AW (1998) Towards areal estimation of soil water content frompoint measurements: time and space stability of mean response. Journal of Hydrology 207, 68–82.
Towards areal estimation of soil water content frompoint measurements: time and space stability of mean response.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1cXjtVKrtbk%3D&md5=ec0c588f9e580e59b041f37bdde9e219CAS |

Heuvelink GBM, Pebesma EJ (1999) Spatial aggregation and soil process modelling. Geoderma 89, 47–65.
Spatial aggregation and soil process modelling.Crossref | GoogleScholarGoogle Scholar |

Hu W, Shao M, Wang Q, Reichardt K (2009) Time stability of soil water storage measured by neutron probe and the effects of calibration procedures in a small watershed. Catena 79, 72–82.
Time stability of soil water storage measured by neutron probe and the effects of calibration procedures in a small watershed.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXps1Kksrk%3D&md5=ad11955ce9fe92231679f3f73de0c93aCAS |

Hu W, Shao M, Han F, Reichardt K, Tan J (2010a) Watershed scale temporal stability of soil water content. Geoderma 158, 181–198.
Watershed scale temporal stability of soil water content.Crossref | GoogleScholarGoogle Scholar |

Hu W, Shao M, Reichardt K (2010b) Using a new criterion to identify sites for mean soil water storage evaluation. Soil Science Society of America Journal 74, 762–773.
Using a new criterion to identify sites for mean soil water storage evaluation.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXmtVWmsrs%3D&md5=274266402b3d62698dfd5a1181817874CAS |

Hu W, Tallon LK, Si BC (2012) Evaluation of time stability indices for soil water storage upscaling. Journal of Hydrology 475, 229–241.
Evaluation of time stability indices for soil water storage upscaling.Crossref | GoogleScholarGoogle Scholar |

Jacobs JM, Mohanty BP, Hsu EC, Miller D (2004) SMEX02: field scale variability, time stability and similarity of soil moisture. Remote Sensing of Environment 92, 436–446.
SMEX02: field scale variability, time stability and similarity of soil moisture.Crossref | GoogleScholarGoogle Scholar |

Kravchenko AN, Robertson GP (2007) Can topographical and yield data substantially improve total soil carbon mapping by regression kriging? Agronomy Journal 99, 12–17.
Can topographical and yield data substantially improve total soil carbon mapping by regression kriging?Crossref | GoogleScholarGoogle Scholar |

Li D, Shao M (2015) Temporal stability of soil water storage in three landscapes in the middle reaches of the Heihe River, northwestern China. Environmental Earth Sciences 73, 3095–3107.
Temporal stability of soil water storage in three landscapes in the middle reaches of the Heihe River, northwestern China.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXhsV2ks7zE&md5=ff98b6fbfc80f72fd9dcd0f1f26ce0a8CAS |

Lin H (2006) Temporal stability of soil moisture spatial pattern and subsurface preferential flow pathways in the shale hills catchment. Vadose Zone Journal 5, 317–340.
Temporal stability of soil moisture spatial pattern and subsurface preferential flow pathways in the shale hills catchment.Crossref | GoogleScholarGoogle Scholar |

Martínez-Fernández J, Ceballos A (2003) Temporal stability of soil moisture in a large field experiment in Spain. Soil Science Society of America Journal 67, 1647–1656.
Temporal stability of soil moisture in a large field experiment in Spain.Crossref | GoogleScholarGoogle Scholar |

Minet J, Verhoest NEC, Lambot S, Vanclooster M (2013) Temporal stability of soil moisture patterns measured by proximal ground-penetrating radar. Hydrology and Earth System Sciences Discussions 10, 4063–4097.
Temporal stability of soil moisture patterns measured by proximal ground-penetrating radar.Crossref | GoogleScholarGoogle Scholar |

Mohanty BP, Skaggs TH (2001) Spatio-temporal evolution and time-stable characteristics of soil moisture within remote sensing footprints with varying soil, slope, and vegetation. Advances in Water Resources 24, 1051–1067.
Spatio-temporal evolution and time-stable characteristics of soil moisture within remote sensing footprints with varying soil, slope, and vegetation.Crossref | GoogleScholarGoogle Scholar |

Mueller TG, Pierce FJ, Schabenberger O, Warncke DD (2001) Map quality for site-specific fertility management. Soil Science Society of America Journal 65, 1547–1558.
Map quality for site-specific fertility management.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38Xptlan&md5=f55525e2ea8722fffaf6c9c68f1f0d09CAS |

Penna D, Brocca L, Borga M, Dalla Fontana G (2013) Soil moisture temporal stability at different depths on two alpine hillslopes during wet and dry periods. Journal of Hydrology 477, 55–71.
Soil moisture temporal stability at different depths on two alpine hillslopes during wet and dry periods.Crossref | GoogleScholarGoogle Scholar |

Petrone RM, Price JS, Carey SK, Waddington JM (2004) Statistical characterization of the spatial variability of the soil moisture in a cutover peatland. Hydrological Processes 18, 41–52.
Statistical characterization of the spatial variability of the soil moisture in a cutover peatland.Crossref | GoogleScholarGoogle Scholar |

Schloeder CA, Zimmerman NE, Jacobs MJ (2001) Comparison of methods for interpolating soil properties using limited data. Soil Science Society of America Journal 65, 470–479.
Comparison of methods for interpolating soil properties using limited data.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38Xpt1On&md5=6b26fe6443c17d7f84f1834e22406789CAS |

She D, Liu Y, Shao M, Timm LC, Yu S (2012) Temporal stability of soil water content for a shallow and deep soil profile at a small catchment scale. Australian Journal of Crop Science 6, 1192–1198.

Song X, Zhou G, Jiang H, Yu S, Fu J, Li W, Wang W, Ma Z, Peng C (2011) Carbon sequestration by Chinese bamboo forests and their ecological benefits: assessment of potential, problems, and future challenges. Environmental Reviews 19, 418–428.
Carbon sequestration by Chinese bamboo forests and their ecological benefits: assessment of potential, problems, and future challenges.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXhsFyltb3E&md5=ff4954f9259c905530983a9a4be06a7bCAS |

Tallon LK, Si BC (2004) Representative soil water benchmarking for environmental monitoring. Journal of Environmental Informatics 1, 28–36.

Thierfelder TK, Grayson RB, van Rosen D, Western AW (2003) Inferring the location of catchment characteristic soil moisture monitoring sites, Covariance structures in the temporal domain. Journal of Hydrology 280, 13–32.
Inferring the location of catchment characteristic soil moisture monitoring sites, Covariance structures in the temporal domain.Crossref | GoogleScholarGoogle Scholar |

Vachaud G, Passerat de Silans A, Balabanis P, Vauclin M (1985) Temporal stability of spatially measured soil water probability density function. Soil Science Society of America Journal 49, 822–828.
Temporal stability of spatially measured soil water probability density function.Crossref | GoogleScholarGoogle Scholar |

Vereecken H, Kamai T, Harter T, Kasteel R, Hopmans J, Vanderborght J (2007) Explaining soil moisture variability as a function of mean soil moisture: a stochastic unsaturated flow perspective. Geophysical Research Letters 34, L22402
Explaining soil moisture variability as a function of mean soil moisture: a stochastic unsaturated flow perspective.Crossref | GoogleScholarGoogle Scholar |

Vivoni ER, Gebremichael M, Watts CJ, Bindlish R, Jackson TJ (2008) Comparison of ground-based and remotely-sensed surface soil moisture estimates over complex terrain during SMEX04. Remote Sensing of Environment 112, 314–325.
Comparison of ground-based and remotely-sensed surface soil moisture estimates over complex terrain during SMEX04.Crossref | GoogleScholarGoogle Scholar |

Williams CJ, McNamara JP, Chandler DG (2009) Controls on the temporal and spatial variability of soil moisture in a mountainous landscape: the signature of snow and complex terrain. Hydrology and Earth System Sciences 13, 1325–1336.
Controls on the temporal and spatial variability of soil moisture in a mountainous landscape: the signature of snow and complex terrain.Crossref | GoogleScholarGoogle Scholar |

Zhao Y, Peth S, Wang X, Lin H, Horn R (2010) Controls of surface soil moisture spatial patterns and their temporal stability in a semi-arid steppe. Hydrological Processes 24, 2507–2519.
Controls of surface soil moisture spatial patterns and their temporal stability in a semi-arid steppe.Crossref | GoogleScholarGoogle Scholar |

Zhou X, Lin H, Zhu Q (2007) Temporal stability of soil moisture spatial variability at two scales and its implication for optimal field monitoring. Hydrology and Earth System Sciences Discussions 4, 1185–1214.
Temporal stability of soil moisture spatial variability at two scales and its implication for optimal field monitoring.Crossref | GoogleScholarGoogle Scholar |

Zhu Q, Lin H (2010) Comparing ordinary kriging and regression kriging for soil properties in contrasting landscapes. Pedosphere 20, 594–606.
Comparing ordinary kriging and regression kriging for soil properties in contrasting landscapes.Crossref | GoogleScholarGoogle Scholar |