Effects of soil and water conservation measures of slope surfaces on flood peaks of small watersheds: A study based on three extreme rainstorm events in northern China

Yuanhao, Liu; Han, Jianqiao; Liu, Yihang; Zhang, Shuyu; Min, Li; Liu, Baoyuan; Jiao, Juying; Zhang, Liang

doi:10.1016/j.catena.2023.107432

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…Similarly, soil and water conservation measures (SWCMs) have a significant impact on the USCs [12,13]. SWCMs can control soil erosion, improve the infiltration of rainfall, and increase the water storage capacity of the basin, so they play a significant role in reducing the extent of flooding during heavy rainfall events [14,15]. Zhao et al [16] revealed that SWCMs can reduce the flood modulus by 57.2%, and they are the major driver of the flood changes in the Yellow River Basin under extreme rainfall conditions.…”

Section: Introductionmentioning

confidence: 99%

Response of Floods to the Underlying Surface Changes in the Taojiang River Basin Using the Hydrologic Engineering Center’s Hydrologic Modeling System

Xiao,

Wen,

et al. 2024

Water

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Due to underlying surface changes (USCs), the changes in the Taojiang River Basin’s flood generation conditions could impact the flooding process in the basin. However, most studies have typically focused on either land-use changes (LUCs) or soil and water conservation measures (SWCMs) to assess the impact of the USCs on floods, which may not provide a more comprehensive understanding of the response of floods to the USCs. To investigate how the USCs have altered the floods in the Taojiang River Basin, located upstream of Poyang Lake, China, the HEC-HMS model, which incorporates the influence of the USCs into the parameter calibration, is established in this study to investigate the flood processes on an hourly scale. The flood peak and the maximum 72 h flood volume are selected as two indexes and are applied to analyze the changes in floods caused by the USCs. The 1981–2020 period is divided into three sub-periods (i.e., 1981–1992, 1993–2007, and 2008–2020) based on the conditions of the USCs. It is found that the two indexes have exhibited decreasing trends, mainly due to the USCs during 1981–2020. Benchmarked against the baseline period of 1981–1992, the two indexes decreased by 3.06% (the flood peak) and 4.00% (the maximum 72 h flood volume) during 1993–2007 and by 5.92% and 7.58% during 2008–2020. Moreover, the impacts of the LUCs and SWCMs are separated through parameter adjustments in the model, revealing that the SWCMs played a dominant role in the USCs in the Taojiang River Basin. The quantification and assessment of the impact of the USCs on floods of different magnitudes revealed that the influence decreases with increasing flood magnitude. The results of this study improve our understanding of how USCs affect the flooding process and therefore provide support for flood control management under changing environments.

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Section: Introductionmentioning

confidence: 99%

Response of Floods to the Underlying Surface Changes in the Taojiang River Basin Using the Hydrologic Engineering Center’s Hydrologic Modeling System

Xiao,

Wen,

et al. 2024

Water

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Using SAR imagery to extract flash flood sediment deposition area in the northern Loess Plateau

Ma,

Jiao,

Yang

et al. 2024

Journal of Hydrology

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Study on Functional Effectiveness of Soil and Water Conservation Measures in Rubber Plantations on Hainan Island

Lu,

Guo,

Chen

et al. 2024

Forests

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In rubber plantations, understory coverage is often disrupted by human activities, which increases the risk of soil erosion under intense rainfall typical of tropical islands. Evaluating the effectiveness of soil and water conservation measures (SWCMs) is crucial for effectively conserving subcanopy resources. This study focused on Hainan Island’s rubber plantations, where nine different SWCMs were implemented, and the runoff and sediment yield were monitored during the rainy season using runoff plots. Through correlation analysis, we identified the primary rainfall characteristic factors leading to soil and water loss on rubber plantation slopes. Path analysis was then used to quantify the impacts of these characteristic factors. The results showed that the SWCMs were significantly more effective in erosion reduction (68.55%) than in runoff reduction (58.95%). Of all the measures, comprehensive SWCMs proved most effective in controlling runoff (71.34%), followed by engineering SWCMs (62.03%) and biological SWCMs (43.51%). Comprehensive SWCMs were also found to be effective in erosion reduction, with a rate of 77.84%, surpassing engineering and biological SWCMs by 7.23% and 20.66%, respectively. Notably, the combination of narrow terraces, contour trenches, and grass planting was the most effective, achieving runoff-reduction rates of 80.94% and erosion-reduction rates of 85.27%. This combination is recommended as a primary prevention method. Rainfall and maximum 30-min intensity (I30) were identified as key variables affecting the efficacy of SWCMs, with rainfall positively correlating with runoff yield and I30 being more closely linked to sediment production. This study provides valuable insights for developing erosion control strategies for sloping garden lands in similar regions and lays theoretical foundations for future ecological restoration projects.

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Effects of soil and water conservation measures of slope surfaces on flood peaks of small watersheds: A study based on three extreme rainstorm events in northern China

Cited by 3 publications

References 51 publications

Response of Floods to the Underlying Surface Changes in the Taojiang River Basin Using the Hydrologic Engineering Center’s Hydrologic Modeling System

Response of Floods to the Underlying Surface Changes in the Taojiang River Basin Using the Hydrologic Engineering Center’s Hydrologic Modeling System

Using SAR imagery to extract flash flood sediment deposition area in the northern Loess Plateau

Study on Functional Effectiveness of Soil and Water Conservation Measures in Rubber Plantations on Hainan Island

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