Subsurface flow in a soil-mantled subtropical dolomite karst slope: A field rainfall simulation study

Fu, Zhiyong; Chen, H.; Zhang, W.; Xu, Qin; Wang, S.; Wang, K.L.

doi:10.1016/j.geomorph.2015.08.012

Cited by 97 publications

(45 citation statements)

References 50 publications

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“…The subsurface flow was highly variable depending on the surface permeability and topography, soil water content and vegetation (Fu et al, 2015;Williams, 2008). The rainfall regimes also played a vital role in affecting the surface flow and sediment loss in the Loess Plateau (Wei et al, 2007), and research by Huang et al (2010) in the red soil region also indicated that surface flow and soil loss differed significantly between rainfall regimes, similarly to the results of Fang et al (2012) and Peng and Wang (2012).…”

Section: Introductionmentioning

confidence: 64%

Characteristics of the surface–subsurface flow generation and sediment yield to the rainfall regime and land-cover by long-term in-situ observation in the red soil region, Southern China

Liu

Yang

et al. 2016

Journal of Hydrology

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Section: Introductionmentioning

confidence: 64%

Characteristics of the surface–subsurface flow generation and sediment yield to the rainfall regime and land-cover by long-term in-situ observation in the red soil region, Southern China

Liu

Yang

et al. 2016

Journal of Hydrology

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“…Water and nutrients could enter the KCN through soil and are transported to the subterranean system easily, but the rates of transport and response times to precipitation are poorly understood in South China karst zone, and the consequences for the geochemical cycles are profound and difficult to predictable. Rainfall simulations are often used to investigate both surface and subsurface runoffs, hydraulic conductivity, soil erosion, and nutrient loss under controlled conditions (e.g., Fu et al, 2015Fu et al, , 2016Gao et al, 2009Gao et al, , 2010Taucer et al, 2008). Using this approach, Taucer et al (2008) found much water bypassing the litter and soil layers via macropore pathways while a portion of water remain as matrix and conduit storage.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen loss from karst area in China in recent 50 years: An in‐situ simulated rainfall experiment's assessment

Song

Gao

Green

et al. 2017

Ecology and Evolution

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Karst topography covers more than 1/3 of the People's Republic of China in area. The porous, fissured, and soluble nature of the underlying karst bedrock (primarily dolomite and limestone) leads to the formation of underground drainage systems. Karst conduit networks dominate this system, and rainfall takes a crucial role on water cycle at China karst area. Nitrogen loss from the karst system is of particular concern, with regard to nutrient use efficiency as well as water quality, as much of the karst system, including steeply sloping terrain, is used for intensive agriculture. We use simulated rainfall experiments to determine the relationship between rainfall and nitrogen loss at typical karst slope land and then estimate nitrogen loss from the karst soil. The results show that both surface runoff and subsurface runoff have a significant linear correlation with rainfall at all studied sites. Subsurface runoff is larger than surface runoff at two karst sites, while the opposite is true at the non‐karst site. Exponential function satisfactorily described the correlation between rainfall and nitrogen concentrations in runoff. Nitrates accounted for 60%–95% of the dissolved nitrogen loss (DN, an index of N‐loss in this research). The estimated annual N‐loss load varies between 1.05 and 1.67 Tg N/year in the whole karst regions of China from 1961 to 2014. Approximately, 90% of the N‐loss load occurred during the wet season, and 90% of that passed through the subsurface. Understanding the processes and estimating N‐loss is highly valuable in determining long‐term soil security and sustainability in karst regions.

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“…Furthermore, human activities and forest clearance in western Ireland caused severe soil loss [6]. To date, several studies [7][8][9][10][11][12][13][14][15][16][17] have been conducted to provide a solution to the management of these areas, and water has been identified as the major drive of the hydrological processes investigated [18][19][20][21]. In actual fact, due to the nature of these environmental layers typical of karst areas, rainfall is largely lost through underground fissures, karst caves and pipelines [22,23], causing major concerns to local authorities on how to prevent droughts and better manage water distribution within the region.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Characterization of Underground Hydrological Processes under Multiple Rainfall Conditions and Rocky Desertification Degrees in Karst Regions of Southwest China

Rubinato

Wan

et al. 2020

Water

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Karst regions are widely distributed in Southwest China and due to the complexity of their geologic structure, it is very challenging to collect data useful to provide a better understanding of surface, underground and fissure flows, needed to calibrate and validate numerical models. Without characterizing these features, it is very problematic to fully establish rainfall–runoff processes associated with soil loss in karst landscapes. Water infiltrated rapidly to the underground in rocky desertification areas. To fill this gap, this experimental work was completed to preliminarily determine the output characteristics of subsurface and underground fissure flows and their relationships with rainfall intensities (30 mm h−1, 60 mm h−1 and 90 mm h−1) and bedrock degrees (30%, 40% and 50%), as well as the role of underground fissure flow in the near-surface rainfall–runoff process. Results indicated that under light rainfall conditions (30 mm h−1), the hydrological processes observed were typical of Dunne overland flows; however, under moderate (60 mm h−1) and high rainfall conditions (90 mm h−1), hydrological processes were typical of Horton overland flows. Furthermore, results confirmed that the generation of underground runoff for moderate rocky desertification (MRD) and severe rocky desertification (SRD) happened 18.18% and 45.45% later than the timing recorded for the light rocky desertification (LRD) scenario. Additionally, results established that the maximum rate of underground runoff increased with the increase of bedrock degrees and the amount of cumulative underground runoff measured under different rocky desertification was SRD > MRD > LRD. In terms of flow characterization, for the LRD configuration under light rainfall intensity the underground runoff was mainly associated with soil water, which was accounting for about 85%–95%. However, under moderate and high rainfall intensities, the underground flow was mainly generated from fissure flow.

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Subsurface flow in a soil-mantled subtropical dolomite karst slope: A field rainfall simulation study

Cited by 97 publications

References 50 publications

Characteristics of the surface–subsurface flow generation and sediment yield to the rainfall regime and land-cover by long-term in-situ observation in the red soil region, Southern China

Characteristics of the surface–subsurface flow generation and sediment yield to the rainfall regime and land-cover by long-term in-situ observation in the red soil region, Southern China

Nitrogen loss from karst area in China in recent 50 years: An in‐situ simulated rainfall experiment's assessment

Preliminary Characterization of Underground Hydrological Processes under Multiple Rainfall Conditions and Rocky Desertification Degrees in Karst Regions of Southwest China

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