Performance of the LandSoil expert‐based model to map erosion and sedimentation: application to a cultivated catchment in central Belgium

Cantreul, Vincent; Pineux, Nathalie; Swerts, Gilles; Bielders, Charles; Degré, A.

doi:10.1002/esp.4808

Cited by 5 publications

(4 citation statements)

References 75 publications

(136 reference statements)

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“…For flow conditions below around 5 L s −1 (i.e., Q 20 % ), land structure change had no apparent adverse effect on erosion; however, with increasing flow, the contribution to sediment load increased continuously, leading to a dominant role at high flow rates. This finding is partially in line with David et al (2014) and Cantreul et al (2020). The aforementioned studies reported that landscape structure was less important for soil erosion than LUCC under normal flow conditions.…”

Section: The Dynamic Relevance Of Land Consolidation In Controlling S...supporting

confidence: 78%

“…Instead of focusing on the spatial connectivity, others (e.g., Bakker et al, 2008;Sharma et al, 2011;Chevigny et al, 2014;Wang et al, 2021;Tang et al, 2021;Madarász et al, 2021) evaluated the effect of terrain, soil properties, lithology, management practices, and other processes associated with landscape and/or land structure changes, and they highlighted their impact on sediment production. It has also been shown that the impact of landscape structure on erosion is more heterogeneous when different crops are grown, and the underlying lithology, soil properties, and topography show substantial spatial variability across the catchment (David et al, 2014;Cantreul et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Agricultural intensification vs. climate change: what drives long-term changes in sediment load?

Wang

Széles

Krammer

et al. 2022

Hydrol. Earth Syst. Sci.

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Abstract. Climate change and agricultural intensification are expected to increase soil erosion and sediment production from arable land in many regions. However, to date, most studies have been based on short-term monitoring and/or modeling, making it difficult to assess their reliability in terms of estimating long-term changes. We present the results of a unique data set consisting of measurements of sediment loads from a 60 ha catchment – the Hydrological Open Air Laboratory (HOAL) – in Petzenkirchen, Austria, which was observed periodically over a time period spanning 72 years. Specifically, we compare Period I (1946–1954) and Period II (2002–2017) by fitting sediment rating curves (SRCs) for the growth and dormant seasons for each of the periods. The results suggest a significant increase in sediment loads from Period I to Period II, with an average of 5.8 ± 3.8 to 60.0 ± 140.0 t yr−1. The sediment flux changed mainly due to a shift in the SRCs, given that the mean daily discharge significantly decreased from 5.0 ± 14.5 L s−1 for Period I to 3.8 ± 6.6 L s−1 for Period II. The slopes of the SRCs for the growing season and the dormant season of Period I were 0.3 and 0.8, respectively, whereas they were 1.6 and 1.7 for Period II, respectively. Climate change, considered in terms of rainfall erosivity, was not responsible for this shift, because erosivity decreased by 30.4 % from the dormant season of Period I to that of Period II, and no significant difference was found between the growing seasons of periods I and II. However, the change in sediment flux can be explained by land use and land cover change (LUCC) and the change in land structure (i.e., the organization of land parcels). Under low- and median-streamflow conditions, the land structure in Period II (i.e., the parcel effect) had no apparent influence on sediment yield. With increasing streamflow, it became more important in controlling sediment yield, as a result of an enhanced sediment connectivity in the landscape, leading to a dominant role under high-flow conditions. The increase in crops that make the landscape prone to erosion and the change in land uses between periods I and II led to an increase in sediment flux, although its relevance was surpassed by the effect of parcel structure change under high-flow conditions. We conclude that LUCC and land structure change should be accounted for when assessing sediment flux changes. Especially under high-flow conditions, land structure change substantially altered sediment fluxes, which is most relevant for long-term sediment loads and land degradation. Therefore, increased attention to improving land structure is needed in climate adaptation and agricultural catchment management.

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Section: The Dynamic Relevance Of Land Consolidation In Controlling S...supporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Agricultural intensification vs. climate change: what drives long-term changes in sediment load?

Wang

Széles

Krammer

et al. 2022

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…Q20%), land consolidation had no apparent adverse effect on erosion control, but with increasing flow, the contribution to sediment load increased continuously, leading to a dominant role at extremely high flow rates. This finding is partially in line with David et al (2014) and Cantreul et al (2020). They reported that landscape structure was less important for soil erosion during most normal flow conditions than 495 land use and land cover.…”

Section: Parcel_effect Versus Lucc_effectsupporting

confidence: 73%

“…Bakker et al, 2008;Sharma et al, 2011;Chevigny et al, 2014;Wang et al, 2021;Tang et al, 2021;Madarász et al, 2021) evaluated the effect of terrain, soil properties, lithology, management practices and other processes associated with landscape and/or land structure changes and highlighted their impact on sediment production. It has 105 also been shown that the impact of landscape structure on erosion is more heterogeneous when different crops are grown, and the underlying lithology, soil properties and topography show substantial spatial variability across the catchment (David et al,2014;Cantreul et al, 2020). production.…”

Section: Introductionmentioning

confidence: 99%

Agricultural intensification vs climate change: What drives long-term changes of sediment load?

Wang

Strauß

Krammer

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. Climate change and agricultural intensification are expected to increase soil erosion and sediment production from arable land in many regions. However, so far, most studies have been based on short-term monitoring and/or modeling, making it difficult to assess their reliability in terms of long-term changes. We present the results from a unique data set consisting of measurements of sediment loads from a 60ha catchment (the HOAL Petzenkirchen in Austria) over a time window spanning 72 years. Specifically, we compare Period I (1946–1954) and Period II (2002–2017) by fitting sediment rating curves for the growth and dormant seasons for each of the periods. The results suggest a significant increase in sediment yield from Period I to Period II with an average of 11.6 ± 10.8 ton·yr−1 to 63.6 ± 84.0 ton·yr−1. The sediment flux changed mainly due to a shift of the sediment rating curves (SRC), given that the annual streamflow varied little between the periods (5.6 l·s−1 and 7.6 l·s−1, respectively, on average). The slopes of the log regression lines of the SRC for the growing season and the dormant season of Period I were 16.72 and 4.9, respectively, whilst they were 5.38 and 1.17 for Period II, respectively. Climate change, considered in terms of rainfall erosivity, was not responsible for this shift, given that erosivity decreased by 30.4 % from the dormant season of Period I to that of Period II, and no significant difference was found between the growing seasons of Periods I and II. However, the sediment flux changes can be explained by changes in crop type and parcel structure. During low and median streamflow conditions (i.e. Q < Q20 %), land consolidation in Period II (i.e. theparcel effect) did not exert an apparent influence on sediment production. Whilst with increasing stream flow (Q > Q20 %), parcel structure played an increasingly role in sediment yield contribution, and leading to a dominant role due to enhanced sediment connectivity in the landscape at extremely high flow conditions (i.e. Q > Q2 %). The increase in cropland in Period II at the expense of grassland had an unfavourable effect on sediment flux, independent of streamflow, with declining relevance as flow increased. We conclude that both land cover change and land consolidation should be accounted for simultaneously when assessing sediment flux changes. Especially during extremely high flow conditions, land consolidation substantially alters sediment fluxes, which is most relevant for long-term sediment loads and land degradation. Increased attention to improving parcel structure is therefore needed in climate adaptation and agricultural catchment management.

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A method to account for diversity of practices in Conservation Agriculture

Ferdinand,

Baret

2024

Agron. Sustain. Dev.

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Conservation Agriculture (CA) is actively promoted as an alternative farming system that combines environmental, economic, and social sustainability. Three pillars define CA: (i) minimum mechanical soil disturbance, (ii) permanent soil organic cover, and (iii) species diversification. The local context, constraints, and needs of the farmers influence the translation of the pillars into practices. Currently, there is no method for categorizing this diversity of CA practices, which hampers impact assessment, understanding of farmer choices and pathways, stakeholder communication, and policymaking. This paper presents a systematic method to identify and categorize the diversity of CA practices at the regional level, anchored in the three pillars and based on practices implemented by CA farmers. The classification method is grounded on the intersection of an archetypal analysis and a hierarchical clustering analysis. This method was used to study CA practices in Wallonia, Belgium, based on a survey of practices in a sample of 48 farmers. Combining the two clustering methods increases the proportion of classified farmers while allowing for the distinction between three CA-types with extreme and salient practices, and two intermediate CA-types comprising farmers whose practices fall between these references. The study reveals that three explanatory factors influence the implementation of CA practices in Wallonia: (i) the proportion of tillage-intensive crops and (ii) temporary grasslands in the crop sequence, and (iii) the organic certification. These factors lead to trade-offs that hinder the three pillars of CA from being fully implemented simultaneously. This new classification method can be replicated in other regions where CA is practiced, by adapting input variables according to context and local knowledge.

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Performance of the LandSoil expert‐based model to map erosion and sedimentation: application to a cultivated catchment in central Belgium

Cited by 5 publications

References 75 publications

Agricultural intensification vs. climate change: what drives long-term changes in sediment load?

Agricultural intensification vs. climate change: what drives long-term changes in sediment load?

Agricultural intensification vs climate change: What drives long-term changes of sediment load?

A method to account for diversity of practices in Conservation Agriculture

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