Using the topography of the saprolite upper boundary to improve the spatial prediction of the soil hydromorphic index

Chaplot, Vincent; Walter, Christian; Curmi, Pierre; Lagacherie, Philippe; King, D.

doi:10.1016/j.geoderma.2004.03.001

Cited by 14 publications

(16 citation statements)

References 43 publications

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“…However, in landscapes with a long-lasting weathering and erosion-accumulation history, such as the BcCZO, the CZ architecture is more complex. Hydrologic-pedologic studies for example that include the complex subsurface topography of the saprolite surface will yield much better results than simple models that integrate surface topography only (Chaplot et al, 2004;Lin et al, 2008).…”

Section: Some Comments On Genesis and Time Of Formation Of The Cz In mentioning

confidence: 99%

Subsurface architecture of the Boulder Creek Critical Zone Observatory from electrical resistivity tomography

Leopold

Völkel

Huber

et al. 2013

Earth Surf Processes Landf

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The architecture of the critical zone includes the distribution, thickness, and contacts of various types of slope deposits and weathering products such as saprolite and weathered bedrock resting on solid bedrock. A quantitative analysis of architecture is necessary for many model-driven approaches used by pedologic, geomorphic, hydrologic or biologic studies. We have used electrical resistivity tomography, a well-established geophysical technique causing minimum surficial disturbance, to portray the subsurface electrical resistivity differences at three study sites (Green Lakes Valley; Gordon Gulch; Betasso) at the Boulder Creek Critical Zone Observatory (BcCZO). Possible limitations of the technique are discussed. Interpretation of the specific resistivity values using natural outcrops, pits, roadcuts and drilling data as ground truth information allows us to image the critical zone architecture of each site. Green Lakes Valley (3700 MASL), a glacially eroded alpine basin, shows a rather simple, split configuration with coarse blockfields and sediments, partly containing permafrost above bedrock. The critical zone in Gordon Gulch (2650 MASL), a montane basin with rolling hills, and Betasso (1925 MASL), a lower montane basin with v-shaped valleys, is more variable due to a complex Quaternary geomorphic history. Boundaries between overlying stratified slope deposits and saprolite were identified at mean depths of 3.0 AE 2.2 m and 4.1 AE 3.6 m in the respective sites. The boundary between saprolite and weathered bedrock is deeper in Betasso at 5.8 AE 3.7 m, compared with 4.3 AE 3.0 m in Gordon Gulch. In general, the data are consistent with results from seismic studies, but electrical resistivity tomography documents a 0.5-1.5 m shallower critical zone above the weathered bedrock on average. Additionally, we document high lateral variability, which results from the weathering and sedimentation history and seems to be a consistent aspect of critical zone architecture within the BcCZO.

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Section: Some Comments On Genesis and Time Of Formation Of The Cz In mentioning

confidence: 99%

Subsurface architecture of the Boulder Creek Critical Zone Observatory from electrical resistivity tomography

Leopold

Völkel

Huber

et al. 2013

Earth Surf Processes Landf

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“…Chaplot et al . () demonstrated that the soil hydromorphic index can be mapped accurately using topographic indices.…”

Section: Mapping Soil Profiles and Pedological Featuresmentioning

confidence: 99%

“…Hydromorphic features (Curmi et al, 1998) are the results of hydrologic processes within the soil and provide evidence of the magnitude and direction of water movement within the soil. The presence of hydromorphic soils influences soil-water-plant interactions and partly controls the hydrological response of catchments (Chaplot et al, 2004) by restricting root growth, storing more (or less) plant available water and promoting lateral water flow . Chaplot et al (2004) demonstrated that the soil hydromorphic index can be mapped accurately using topographic indices.…”

Section: Mapping Pedological Featuresmentioning

confidence: 99%

“…The presence of hydromorphic soils influences soil-water-plant interactions and partly controls the hydrological response of catchments (Chaplot et al, 2004) by restricting root growth, storing more (or less) plant available water and promoting lateral water flow . Chaplot et al (2004) demonstrated that the soil hydromorphic index can be mapped accurately using topographic indices. Bell et al (1992) used multivariate discriminant analysis with topography and geological information to predict drainage classes spatially.…”

Section: Mapping Pedological Featuresmentioning

confidence: 99%

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Pedology and digital soil mapping (DSM)

Minasny

Malone

et al. 2019

European J Soil Science

165

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Pedology focuses on understanding soil genesis in the field and includes soil classification and mapping. Digital soil mapping (DSM) has evolved from traditional soil classification and mapping to the creation and population of spatial soil information systems by using field and laboratory observations coupled with environmental covariates. Pedological knowledge of soil distribution and processes can be useful for digital soil mapping. Conversely, digital soil mapping can bring new insights to pedogenesis, detailed information on vertical and lateral soil variation, and can generate research questions that were not considered in traditional pedology. This review highlights the relevance and synergy of pedology in soil spatial prediction through the expansion of pedological knowledge. We also discuss how DSM can support further advances in pedology through improved representation of spatial soil information. Some major findings of this review are as follows: (a) soil classes can be mapped accurately using DSM, (b) the occurrence and thickness of soil horizons, whole soil profiles and soil parent material can be predicted successfully with DSM techniques, (c) DSM can provide valuable information on pedogenic processes (e.g. addition, removal, transformation and translocation), (d) pedological knowledge can be incorporated into DSM, but DSM can also lead to the discovery of knowledge, and (e) there is the potential to use process‐based soil–landscape evolution modelling in DSM. Based on these findings, the combination of data‐driven and knowledge‐based methods promotes even greater interactions between pedology and DSM. Highlights Demonstrates relevance and synergy of pedology in soil spatial prediction, and links pedology and DSM. Indicates the successful application of DSM in mapping soil classes, profiles, pedological features and processes. Shows how DSM can help in forming new hypotheses and gaining new insights about soil and soil processes. Combination of data‐driven and knowledge‐based methods recommended to promote greater interactions between DSM and pedology.

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“…By mantling the bedrock, PSDs play an important role in surface runoff, interflow (throughflow) and groundwater runoff (Buttle and House, 1997;Chaplot et al, 2004). In slopes with a complete PSD cover, surface runoff is quite rare and interflow is more dominant (Völkel, 1995;Chaplot and Walter, 2003).…”

Section: Ecological Significancementioning

confidence: 99%

Character, Age, and Ecological Significance of Pleistocene Periglacial Slope Deposits in Germany

Raab

Leopold

Völkel³

2007

Physical Geography

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Periglacial slope deposits (PSD) of Pleistocene age are one of the most widely distributed sediment types in nonglaciated mid-latitude regions. As diamictons of different genesis (geli-solifluction, cryoturbation, eolian transportation) they have a wide range of physical, chemical and mineralogical characteristics which are mainly controlled by bedrock geology, including saprolite. This paper reviews concepts used in Germany to study PSD stratigraphy and describes the different PSD units encountered (Upper Head, Middle Head, Lower Head). The paper is relevant to the understanding of PSDs in other midlatitude regions. Classical and new results concerning the age of PSDs show differences in the interpretation of Upper Head genesis. In terms of their ecological significance, case studies from eastern Bavaria illustrate the influence of PSDs on the character and intensity of slope hydrological processes as well as on the formation and distribution of soils. Presently important research questions include (1) the establishment of a genetically based classification of PSDs, (2) the intensification of dating studies on PSDs, and (3) the clarification of hydrological processes in PSDs. [

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Using the topography of the saprolite upper boundary to improve the spatial prediction of the soil hydromorphic index

Cited by 14 publications

References 43 publications

Subsurface architecture of the Boulder Creek Critical Zone Observatory from electrical resistivity tomography

Subsurface architecture of the Boulder Creek Critical Zone Observatory from electrical resistivity tomography

Pedology and digital soil mapping (DSM)

Character, Age, and Ecological Significance of Pleistocene Periglacial Slope Deposits in Germany

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