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Author: search.filters.author.Apriyono, ArwanSubject: search.filters.subject.Infiltration rate

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    The influence of root-crack dynamics on soil water infiltration across seasonal variations
    (2025-12-01)
    Yuliana, Yuliana
    ;
    Apriyono, Arwan
    ;
    Munirwan, Reza Pahlevi
    ;
    Feng, Song
    ;
    Kamchoom, Viroon
    Soil infiltration plays a vital role in the hydrological cycle, impacting water absorption and availability for crops. Accurate infiltration measurements are crucial for improving water management in agricultural systems. This study observed the interaction of root growth and crack to the infiltration rate with influence of wetting drying conditions. Over an 18-month period, a double-ring infiltrometer test was applied to directly assess infiltration rates in both bare and vegetated zones. A minirhizotron camera was used to capture the root growth and decay defined as Root Area Ratio (RAR) and crack defines as crack intensity factor (CIF). The findings reveal that root growth peaked at 6.3 % during the first cycle but declined to 4.5 % in the second dry summer due to water stress and root decay. Vegetated zone also experienced lower CIF compared to bare zone. Infiltration rates increased significantly during dry periods, with the bare zone reaching a final rate of 1.63 × 10⁻⁶ m/s and vegetated zones showing up to an 8-fold increase in the second cycle. These findings underscore the critical role of root dynamics and soil cracking in regulating water infiltration. For agricultural systems, understanding these processes is essential for developing effective soil management and irrigation strategies that improve infiltration, enhance soil stability, and optimize crop productivity.
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    The effect of desiccation cracks on water infiltration in landfill cover under extreme climate scenarios
    (2025-04-01)
    Apriyono, Arwan
    ;
    Yuliana, Yuliana
    ;
    Kamchoom, Viroon
    ;
    Leung, Anthony Kwan
    ;
    Jotisankasa, Apiniti
    Predicting water infiltration in clay poses a significant challenge, primarily due to the presence of desiccation cracks, which are amplified by extreme climate. Accurate methods for calculating water infiltration, considering crack variations under extreme climates are essential especially for landfill covers. The objective of this study is to explore the relationship between crack intensity factor (CIF) and water infiltration in high-plasticity clay, focusing on seasonal changes and extreme climate conditions. A series of double-ring infiltration tests was conducted in the field to observe the impact of desiccation cracks on water infiltration. Subsequently, a modified Green–Ampt method incorporating CIF was developed and validated against these field test results to improve water infiltration predictions. This study revealed that the maximum CIF was notably higher in the second dry season (11.4 %) than that in the first one (8.1 %), indicating soil structural degradation. An exponential correlation was observed between increased CIF and infiltration rates, attributed to cracks creating preferential pathways. In extreme climate scenarios, CIF increases could surpass 15 %, potentially elevating soil's saturated hydraulic conductivity (K<inf>s</inf>) by over 85 % relative to current climate conditions.