Article
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Impact of Antecedent Soil Moisture on Interrill Erosion
Version 1
: Received: 10 May 2024 / Approved: 10 May 2024 / Online: 10 May 2024 (12:23:38 CEST)
How to cite: Chen, Y.-D.; Wu, C.-C. Impact of Antecedent Soil Moisture on Interrill Erosion. Preprints 2024, 2024050683. https://doi.org/10.20944/preprints202405.0683.v1 Chen, Y.-D.; Wu, C.-C. Impact of Antecedent Soil Moisture on Interrill Erosion. Preprints 2024, 2024050683. https://doi.org/10.20944/preprints202405.0683.v1
Abstract
The impact of antecedent soil moisture content on soil erosion is a complicated phenomenon, which is still under argument with contradictions in research results. Hence, the objective of this study is to investigate the impact of antecedent soil moisture content to soil loss on clay soil by conducting two-year field experiments under natural rainfall on runoff plots with length of 10 meters, width of 3 meters, and uniform slope of 9%. Volumetric soil moisture sensors were used to log soil moisture changes, and soil moisture readings were used along with rainfall records to quantify the antecedent soil moisture conditions for each rainfall event. Results of this study show duration of the effective erosion event outranks the antecedent volumetric soil moisture content. Field study also suggests that accumulative rain falling within 48 hours (Pp48) prior to an effective erosion event strongly correlated with soil loss per Rainfall-Runoff Erosivity Index (Soil Loss / EI30), particularly when the duration of an effective erosion event is either between 3 ~ 7 hours or 10~ 30 hours. Hence, Pp48 can be considered as an alternative to replace antecedent soil moisture content in RUSLE 2’s cover and management factor.
Keywords
Interrill erosion, Soil loss, Antecedent soil moisture content, Rainfall Characteristics
Subject
Environmental and Earth Sciences, Geography
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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