Development and Application of Algorithms for Simulating Terraces within SWAT

doi:10.13031/trans.56.10047

Cited by 7 publications

(6 citation statements)

References 24 publications

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Section: The Swat Modelmentioning

confidence: 99%

“…The terrace module of the SWAT model, developed based on the physical processes of terrace watershed hydrology, addresses the previously existing gap in the SWAT model for simulating terraced measures in watershed studies [38]. It achieves this by adjusting The terrace module of the SWAT model, developed based on the physical processes of terrace watershed hydrology, addresses the previously existing gap in the SWAT model for simulating terraced measures in watershed studies [38]. It achieves this by adjusting erosion and runoff parameters to simulate terraced fields, specifically by modifying the Universal Soil Loss Equation conservation factors (USLE P-factor), slope length factor, and the SCS curve number (CN2) to capture the influence of terraced fields.…”

Section: The Swat Modelmentioning

confidence: 99%

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Rice Terraces Enhanced the Hydrological Stability of Small Watershed with LUCC—A Case Study of Xinhua Basin

Deng,

Li,

Liu

et al. 2024

Water

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Rice terraces are crucial for agriculture in China’s southern mountainous regions. Land use and land cover change (LUCC) in these areas impact hydrology, but our understanding is limited. In this study, we applied the hydrological assessment tool SWAT to a selected small watershed in the rice terrace-dense area of central Hunan province, China. This study covered four LUCC periods over the past 40 years and was simulated at annual and monthly scales. The results showed that from 1980 to 2020, the areas of paddy fields and drylands decreased by 4.19% and 5.76%, respectively, while the areas of forests and construction land increased by 1.14% and 92.48%, respectively. During the past period, LUCC led to a decrease of 1.77% and 2.49% in runoff and infiltration, respectively, and an increase of 1.03% in ET. However, the water yield remained almost unchanged, indicating that the rice terrace plays a positive role in maintaining stable watershed water yield under LUCC. The results of the sub-basin analysis indicated that the transformation of paddy fields and forests directly determines the trend of hydrological changes. Land use type had the most significant impact on the runoff of the rice-terrace watershed, with the proportions of paddy fields and forests being the most influential factors. Paddy fields significantly influenced the stability of runoff at the watershed scale, suggesting that a high paddy field ratio doesn’t ensure sustainability. This study offers valuable insights for managing small watershed terraces, land use planning, and achieving sustainable development in the watershed.

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Section: The Swat Modelmentioning

confidence: 99%

Section: The Swat Modelmentioning

confidence: 99%

Rice Terraces Enhanced the Hydrological Stability of Small Watershed with LUCC—A Case Study of Xinhua Basin

Deng,

Li,

Liu

et al. 2024

Water

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“…F I G U R E 7 Average catchment response for the three-scenarios over the 8 years period Besides the inclusion of dynamic input parameters over time, future works could benefit from a more detailed DEM resolution, especially when involving deep soil mobilizations as terracing, since the elevation map has a substantial impact on the geomorphological and topographic indices as well as the hydrological features (Vaze et al, 2010). Furthermore, SWAT assumes regular geometry for all terraces (Shao et al, 2013), while in reality, the catchment presents heterogeneous configurations with various slope angles, likely affecting the hydrological response.…”

Section: Model Performancementioning

confidence: 99%

A modelling approach to evaluate land management options for recently burnt catchments

Basso

Serpa

Rocha³

et al. 2022

European J Soil Science

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Scars left by wildfires are easily visible in the Mediterranean landscape and, like any wound, even those left by fires must be treated to regenerate properly. If not managed, spontaneous vegetation regeneration will eventually cover the affected area, restoring the hydrological cycle. The reforestation of burned stands, involving ploughing the land and building terraces on steep slopes, together with fertilisation of the area, is also common. The Soil and Water Assessment Tool (SWAT) was used to simulate three post-fire land management options for a small catchment in central Portugal. The choice of this basin relates to the implementation of terraces to create a eucalyptus forest production area 7 months after a fire completely burned the catchment. Two alternative post-fire scenarios were designed, one simulating the spontaneous recovery of the ecosystem and the second reproducing a catchment-scale implementation of a highly effective erosion mitigation measure (mulching).

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“…The SWAT-Terrace (SWAT-T) was developed on the SWAT 2009 version and provides a process-based algorithm to simulate the hydrological effects of the terrace engineering at the HRU level (Shao et al, 2013). The GLCP uses a terraced geometry structure, and the storage effect can be simulated in SWAT-T; in addition, the location and area of the Project in a watershed can also be determined with the SWAT-T (Shao, 2013):…”

Section: Swat and Swat-terracementioning

confidence: 99%

Evaluation of the impact of the Gully Land Consolidation Project on runoff under extreme rainfall

et al. 2022

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Extreme rainfall is an important driver of soil erosion and land damage. The Gully Land Consolidation program (GLCP) was first launched in 2011 as a major land reclamation practice to increase farmland in the Loess Plateau of China. Studying the impact of artificial projects on hydrology can help humans to respond to the various water issues, but the assessment of the effects of the GLCP on extreme rainfallinduced water runoff at watershed scale is currently lacking. Our study used the soil and water assessment tool (SWAT) to evaluate the influence of the GLCP at different locations and areas on water runoff under extreme rainfall events in the Yanhe watershed. Results showed that: (1) the GLCP can improve the interception of surface runoff, with interception efficiency in downstream of the watershed approximately twice that at midstream and entire watershed as well as seven-times that at the upstream; (2) when GLCP measures are evenly distributed in a watershed, as the area of GLCP increases from 76.40 km 2 (1% of watershed area) to 382.01 km 2 (5%), the interception of surface runoff increases by 0.77 mm; (3) and the GLCP can increase soil infiltration and groundwater recharge. This research is expected to provide insights into the optimized layout of the GLCP at watershed scale. Correspondingly, policymakers can refer to this information in developing policies on the sustainable use of land.

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Development and Application of Algorithms for Simulating Terraces within SWAT

Cited by 7 publications

References 24 publications

Rice Terraces Enhanced the Hydrological Stability of Small Watershed with LUCC—A Case Study of Xinhua Basin

Rice Terraces Enhanced the Hydrological Stability of Small Watershed with LUCC—A Case Study of Xinhua Basin

A modelling approach to evaluate land management options for recently burnt catchments

Evaluation of the impact of the Gully Land Consolidation Project on runoff under extreme rainfall

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