Integrative Analysis of Surface Runoff and Macropore Flow for Slopes under Rainfall Conditions

Que, Yun; Lin, Peiyuan; Lin, Denghui

doi:10.1155/2018/9458410

Cited by 7 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhu et al [23] established an infiltration runoff model for mountain slopes and conducted field flow production and natural precipitation catchment tests; the experimental results were compared with the model to find that the model can better simulate runoff and infiltration, and the measured and simulated values were in good agreement. Yun Que et al [24] proposed a joint approach using a dual infiltration model and a kinematic wave model, performed laboratory tests and found that the presence of macropores greatly facilitated the movement of rainwater on the slope surface. Chao Zhang et al [25] conducted model experiments to find how the groundwater table, which generates pore water pressure, is affected by infiltration time lag, surface runoff and lateral flow.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Substrate Properties on Rainfall Infiltration and Runoff from Ecological Slopes

et al. 2023

View full text Add to dashboard Cite

Rain is an important factor influencing the instability of ecological slopes. There is little research on the inherent quantitative influence of substrate properties on slope runoff and water infiltration to support accurate ecological slope protection design. In this paper, the influence of substrate characteristics on slope runoff and water infiltration is quantitatively analyzed by constructing large physical models with different substrate characteristics for artificial rainfall simulations. The experimental results showed that the cumulative runoff volume and slope runoff rate were positively correlated with the cement content and substrate thickness in a 4 h, 60 mm/h artificially simulated rainfall. Specifically, the cumulative runoff volume increased by 2.06% for every 1% increase in cement content, and the cumulative runoff volume increased by 3.93% for every 1 cm increase in substrate thickness. The substrate inhibited the advance of the wetting front, and at different slope locations, the transport rate of the wetting front exhibited a mid-slope > upslope. Moreover, the transport rate of the wetting front showed a non-linear relationship with time as a power function V = a·tb, with the cement content showing a linear relationship with parameters a and b, and the substrate thickness showing a non-linear relationship with parameters a and b. The cumulative infiltration and infiltration rate were negatively correlated with cement content and substrate thickness, as shown by a 2.2% decrease in cumulative infiltration for every 1% increase in cement content and a 4.73% decrease in cumulative infiltration for every 1 cm increase in substrate thickness.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Substrate Properties on Rainfall Infiltration and Runoff from Ecological Slopes

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Increased precipitation events associated with extreme weather conditions affect the stability of slopes and can lead to a variety of geoenvironmental hazards [3,4]. Consequently, shallow landslides may often occur within the vadose zone under unsaturated soil conditions [5][6][7]. The prediction of flow in transient conditions is important in engineering practice while considering the stability of unsaturated soil slopes [8][9][10][11][12] or poromechanical coupling influence for rainfall-induced shallow landslides in unsaturated soils [13,14].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Transient Flow in Unsaturated Geomaterials for Rainfall-Induced Landslides Using a Novel Spacetime Collocation Method

Liu

et al. 2018

Geofluids

View full text Add to dashboard Cite

The modeling of transient flow in unsaturated soils for rainfall-induced landslides using a novel spacetime collocation method is presented. A numerical solution obtained in the spacetime coordinate system is approximated by superpositioning Trefftz basis functions satisfying the linearized Richards equation for collocation points on the spacetime domain boundary. The Gardner exponential model is adopted to derive the linearized Richards equation to describe the soil-water characteristic curve in unsaturated soils. To deal with the rainfall-induced landslides, the infinite slope stability analysis coupled with the proposed meshless method with the consideration of the fluctuation of time-dependent matric suction is developed. The proposed method is validated for several test problems. Application examples of transient modeling of flow for rainfall-induced landslides in homogenous unsaturated soils are also conducted. Numerical results demonstrate that the proposed method is highly accurate to deal with transient flow in unsaturated soils for rainfall-induced landslides. In addition, it is found that the numerical method using the Richards equation with the Gardner model may provide a promising solution for different soil textures.

show abstract

“…Some macropores may connect to drainage tiles directly, creating an express path for water and chemicals (Malone et al, 2001;Fox et al, 2004). In general, accurate simulations of chemical transport in tile flow are dependent on accurate subsurface drainage (Malone et al, 2004a,b), and the latter is affected by rainfall intensity, soil matrix properties, and macroporosity (Fox et al, 2007;Nimmo, 2016;Que et al, 2018;Gao et al, 2018).…”

mentioning

confidence: 99%

“…Macropore flow velocity may be simulated by Poiseulle's law (Ahuja et al, 2000), kinematic wave (Que et al, 2018;Orozco-López et al, 2018), Stokes's law (Orozco-López et al, 2018), and power law (Jarvis et al, 1994). However, Gao et al (2018) found that Poiseulle's and the kinematic wave (Manning equation) overestimated macropore flow velocity.…”

mentioning

confidence: 99%

Assessment of Macropore Component of RZWQM2 in Simulating Hourly Subsurface Drainage and Peaks

Li,

Xian,

et al. 2023

Journal of the ASABE

View full text Add to dashboard Cite

Highlights The macropore component of RZWQM2 was evaluated using hourly drainage and rainfall data. Activating macropore components improved hourly drainage peak simulation. Macropore flow simulated by RZWQM2 was insensitive to the macroporosity and pore radius. Abstract. Understanding preferential flow through soil macropores is critical to effectively managing subsurface drainage water quantity and quality. This study aims to assess the macropore component of the Root Zone Water Quality Model (RZWQM2) in simulating subsurface tile flow with a high time resolution. Observed hourly tile flow rates from two experimental sites in Ontario, Canada (2008-2011) and Iowa, USA (2007-2008) were used to evaluate the importance of including a macropore flow component in subsurface drainage simulation. Activating the macropore component in the model improved the simulation of hourly drainage peaks, especially peak amplitude. Still, it did not improve the simulation of the total drainage amount for each rainfall event. Simulation of the drainage peak recession varied from peak to peak, suggesting that further studies are warranted for drainage flow in the model. In general, the macropore component in the RZWQM2 model improved subsurface peak subsurface simulation at the hourly resolution. However, further investigation and model modifications are needed to improve the drainage simulation’s timing and quality for RZWQM2’s hydrologic simulation of macropore flow and subsurface drainage. Keywords: Macropores, RZWQM2, Subsurface drainage modelling, Preferential flow simulation.

show abstract

Integrative Analysis of Surface Runoff and Macropore Flow for Slopes under Rainfall Conditions

Cited by 7 publications

References 27 publications

Experimental Study on the Influence of Substrate Properties on Rainfall Infiltration and Runoff from Ecological Slopes

Experimental Study on the Influence of Substrate Properties on Rainfall Infiltration and Runoff from Ecological Slopes

Modeling of Transient Flow in Unsaturated Geomaterials for Rainfall-Induced Landslides Using a Novel Spacetime Collocation Method

Assessment of Macropore Component of RZWQM2 in Simulating Hourly Subsurface Drainage and Peaks

Contact Info

Product

Resources

About