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学者姓名：简文彬
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Abstract ：
We develop a reduced-order modeling strategy aimed at providing numerical Monte Carlo simulations of groundwater flow in randomly heterogeneous transmissivity fields. We rely on moment equations for groundwater flow and conduct space reductions for both transmissivity, T , and hydraulic head, h . A truncated singular value decomposition (SVD) solver is employed to cope with the ill-conditioned stiffness matrix caused by (negative and thus) unphysical values of T that might arise due to possible low accuracy stemming from the order of model reduction. The performance of the approach is assessed through the analysis of various synthetic reference scenarios. These encompass diverse degrees of heterogeneity of the transmissivity field and various values of reduced-order dimensions, n and m , associated with h and T , respectively. Transmissivity is conceptualized as a composite (spatial) random field where there is uncertainty in the locations of regions associated with diverse geomaterials as well as in the heterogeneity of transmissivity therein. Our results are also compared against their counterparts that one could obtain upon performing a model reduction solely on the basis of hydraulic heads. Our findings show that: (i) resting on the truncated SVD solver is beneficial for coping with ill- conditioned stiffness matrices; (ii) the two model reduction strategies provide comparable solution accuracy for m >= 5n, while (iii) the computational cost associated with the reduced-order model based on space reduction for both T and h is always significantly smaller than that associated with space reduction based solely on h .
Keyword ：
Groundwater Groundwater Moment equations Moment equations Monte Carlo simulation Monte Carlo simulation Reduced-order model Reduced-order model Truncated singular value decomposition Truncated singular value decomposition
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| GB/T 7714 | Xia, Chuan-An , Wang, Hao , Jian, Wenbin et al. Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields [J]. | JOURNAL OF HYDROLOGY , 2025 , 651 . |
| MLA | Xia, Chuan-An et al. "Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields" . | JOURNAL OF HYDROLOGY 651 (2025) . |
| APA | Xia, Chuan-An , Wang, Hao , Jian, Wenbin , Riva, Monica , Guadagnini, Alberto . Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields . | JOURNAL OF HYDROLOGY , 2025 , 651 . |
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煤炭开挖和选煤过程中产生大量煤矸石,堆积于地表的煤矸石易受到环境的影响引发灾害.目前,干湿循环条件下煤矸石土石混合体的强度特性研究较少.通过大型直剪试验,探究干湿循环和含石量对煤矸石土石混合体强度特性的作用机制;揭示含石量(RP)和干湿循环次数对土石混合体积变化及相对破碎率(rB)的影响规律;建立干湿循环下土石混合体抗剪强度劣化方程.试验结果表明,随着含石量的提高,煤矸石土石混合体的内摩擦角呈现线性增加,而黏聚力则呈现出下降趋势;煤矸石土石混合体在剪切过程中呈现明显的剪切收缩现象;煤矸石土石混合体的剪切强度和法向应变最大值随着含石量的增加而增加,并随着干湿循环次数的增加而减小.首次干湿循环对土石混合体的抗剪强度劣化作用显著,3 次干湿循环后土石混合体抗剪强度变化不明显;干湿循环加剧了土石混合体中岩块的破碎趋势,提高岩块的 rB,导致土壤颗粒含量(粒径＜5 mm)增加.高法向应力下(nσ=800 kPa),rB 随干湿循环次数增加而提高,而低法向应力下(nσ=200 kPa)干湿循环对岩块破碎影响有限.
Keyword ：
剪切强度 剪切强度 土石混合体 土石混合体 岩石力学 岩石力学 干湿循环 干湿循环 煤矸石 煤矸石 相对破碎率 相对破碎率
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| GB/T 7714 | 刘红位 , 游诗琪 , 简文彬 et al. 干湿循环下煤矸石土石混合体大型直剪试验研究 [J]. | 岩石力学与工程学报 , 2025 , 44 (2) : 331-341 . |
| MLA | 刘红位 et al. "干湿循环下煤矸石土石混合体大型直剪试验研究" . | 岩石力学与工程学报 44 . 2 (2025) : 331-341 . |
| APA | 刘红位 , 游诗琪 , 简文彬 , 黄云 , 冯嵩 , 邓涛 . 干湿循环下煤矸石土石混合体大型直剪试验研究 . | 岩石力学与工程学报 , 2025 , 44 (2) , 331-341 . |
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Rainfall-induced landslides are widely distributed in many countries. Rainfall impacts the hydraulic dynamics of groundwater and, therefore, slope stability. We derive an analytical solution of slope stability considering effective rainfall based on the Richards equation. We define effective rainfall as the total volume of rainfall stored within a given range of the unsaturated zone during rainfall events. The slope stability at the depth of interest is provided as a function of effective rainfall. The validity of analytical solutions of system states related to effective rainfall, for infinite slopes of a granite residual soil, is verified by comparing them with the corresponding numerical solutions. Additionally, three approaches to global sensitivity analysis are used to compute the sensitivity of the slope stability to a variety of factors of interest. These factors are the reciprocal of the air-entry value of the soil alpha, the thickness of the unsaturated zone L, the cohesion of soil c, the internal friction angle phi related to the effective normal stress, the slope angle beta, the unit weights of soil particles gamma(s), and the saturated hydraulic conductivity K-s. The results show the following: (1) The analytical solutions are accurate in terms of the relative differences between the analytical and the numerical solutions, which are within 5.00% when considering the latter as references. (2) The temporal evolutions of the shear strength of soil can be sequentially characterized as four periods: (i) strength improvement due to the increasing weight of soil caused by rainfall infiltration, (ii) strength reduction controlled by the increasing pore water pressure, (iii) strength reduction due to the effect of hydrostatic pressure in the transient saturation zone, and (iv) stable strength when all the soil is saturated. (3) The large alpha corresponds to high effective rainfall. (4) The factors ranked in descending order of sensitivity are as follows: alpha > L > c > beta > gamma(s) > K-s > phi.
Keyword ：
analytic solution analytic solution effective rainfall effective rainfall global sensitivity analysis global sensitivity analysis shear strength shear strength slope stability slope stability
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| GB/T 7714 | Xia, Chuan-An , Zhang, Jing-Quan , Wang, Hao et al. Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions [J]. | WATER , 2025 , 17 (2) . |
| MLA | Xia, Chuan-An et al. "Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions" . | WATER 17 . 2 (2025) . |
| APA | Xia, Chuan-An , Zhang, Jing-Quan , Wang, Hao , Jian, Wen-Bin . Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions . | WATER , 2025 , 17 (2) . |
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The availability of remotely sensed data sources makes it possible to generate large-scale studies efficiently, accurately, and geographically scalable. Considering the remote sensing benefits and scope, we propose a methodology that integrates critical variables for a landslide susceptibility map preparation with an accurate hazard assessment in large areas. As a result, different areas prone to landslides are identified with precision in an efficient, safe, and accessible way through susceptibility map preparation. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
Keyword ：
Conditioning factors Conditioning factors Geohazard risk Geohazard risk Landslide susceptibility Landslide susceptibility Remote sensing Remote sensing
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| GB/T 7714 | Montenegro, A. , Descote, P.-Y. , Lattus, J.M. et al. Satellite Remote Sensing Applied to Landslide Susceptibility in the Andean Cordillera (33°27'–33°55' S) [未知]. |
| MLA | Montenegro, A. et al. "Satellite Remote Sensing Applied to Landslide Susceptibility in the Andean Cordillera (33°27'–33°55' S)" [未知]. |
| APA | Montenegro, A. , Descote, P.-Y. , Lattus, J.M. , Robledo, L.F. , Gattica, G. , Palma, X. et al. Satellite Remote Sensing Applied to Landslide Susceptibility in the Andean Cordillera (33°27'–33°55' S) [未知]. |
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The tensile strength of roots and the friction characteristics of the root-soil interface of tree species are the indicators that play a crucial role in understanding the mechanism of soil reinforcement by roots. To calculate the effectiveness of the reinforcement of soil by tree roots based on essential influencing parameters, typical trees in the coastal region of southeastern China selected for this study were subjected to tests of the tensile mechanical properties of their roots, as well as studies on the friction characteristics of the root-soil interface and the microscopic interfaces. The results indicated that in the 1-7 diameter classes, the root tensile strength of both Pinus massoniana and Cunninghamia lanceolata was negatively correlated with the root diameter in accordance with the power function. The root tensile strength of these two trees, however, was positively correlated with the lignin content but negatively correlated with cellulose and hemicellulose contents. The shear strength at the root-soil interface and the vertical load exhibited a constitutive relationship, which followed the Mohr-Coulomb criterion. As the root diameter increased, both the cohesion and the friction coefficients at the root-soil interface gradually increased, but the growth rate stood at around 15%. The cohesion value of the root-soil interface of the two trees decreased linearly with the increase in soil moisture content within the range of 25 to 45%. At the microinterface, the root surface of C. lanceolata exhibited concave grooves and convex ridges that extended along the axial direction of roots, with their height differences increasing with the enlargement of the root diameter. The rough surface of P. massoniana roots had areas composed of polygonal meshes, with an increase observed in the mesh density with increasing root diameter.
Keyword ：
chemical composition chemical composition root-soil interface root-soil interface root surface microstructure root surface microstructure tensile strength tensile strength tree roots tree roots
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| GB/T 7714 | Lin, Yunzhao , Jian, Wenbin , Zhu, Zuteng et al. Study on the Mechanical Properties of Roots and Friction Characteristics of the Root-Soil Interface of Two Tree Species in the Coastal Region of Southeastern China [J]. | FORESTS , 2024 , 15 (8) . |
| MLA | Lin, Yunzhao et al. "Study on the Mechanical Properties of Roots and Friction Characteristics of the Root-Soil Interface of Two Tree Species in the Coastal Region of Southeastern China" . | FORESTS 15 . 8 (2024) . |
| APA | Lin, Yunzhao , Jian, Wenbin , Zhu, Zuteng , Wu, Yilong , Wang, Hao , Fan, Xiufeng . Study on the Mechanical Properties of Roots and Friction Characteristics of the Root-Soil Interface of Two Tree Species in the Coastal Region of Southeastern China . | FORESTS , 2024 , 15 (8) . |
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Variable-density groundwater flow (VDGF) is jointly driven by hydraulic and density gradient, leading to strong nonlinearity, large computational burden of numerical models, and therefore huge computational cost of Monte Carlo simulation for uncertainty analysis. This study developed the reduced-order model (ROM) for VDGF and built the Gaussian process (GP) for simulating the numerical error of the ROM. The coupled model can obtain solutions of head and salinity across the study domain while GP simulates observation information at limited locations. Moreover, the coupled model can provide higher solution accuracies of head and salinity at the observation locations than the ROM. A two-dimensional (cross-section) VDGF test case was considered, where hydraulic conductivity was taken as a spatially random field. MC simulations were performed using three models, including the full-system model, the ROM, and the coupled model, with corresponding MC strategies denoted as FSMC, ROMC, and GP-ROMC, respectively. The results show that ROMC can be an alternative to FSMC for conducting uncertainty quantification. The relationship between head (or salinity) and the dimensional of ROM can be characterized using power functions with determinate coefficients larger than 0.99. GP-ROMC has higher solution accuracy than ROMC, which indicates that GP is capable for simulating the numerical error of ROM. The results in this study are significant for performing simulation, uncertainty quantification, risk assessment, and parameter estimate in the context of groundwater. © 2024 Editorial Office of Hydrogeology and Engineering. All rights reserved.
Keyword ：
Gaussian process Gaussian process groundwater groundwater Monte Carlo simulation Monte Carlo simulation reduced-order model reduced-order model variable-density groundwater flow variable-density groundwater flow
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| GB/T 7714 | Xia, C. , Fan, X. , Wang, H. et al. Monte Carlo simulation for variable-density groundwater flow through reduced-order model coupled with Gaussian process; [耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟] [J]. | Hydrogeology and Engineering Geology , 2024 , 51 (5) : 1-13 . |
| MLA | Xia, C. et al. "Monte Carlo simulation for variable-density groundwater flow through reduced-order model coupled with Gaussian process; [耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟]" . | Hydrogeology and Engineering Geology 51 . 5 (2024) : 1-13 . |
| APA | Xia, C. , Fan, X. , Wang, H. , Jian, W. . Monte Carlo simulation for variable-density groundwater flow through reduced-order model coupled with Gaussian process; [耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟] . | Hydrogeology and Engineering Geology , 2024 , 51 (5) , 1-13 . |
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Moso bamboo is widespread in the hilly and mountainous regions of southeastern Fujian. Moso bamboo is extensively distributed across the hilly and mountainous regions of southeastern Fujian. To delve into the unique vegetation Moso bamboo’s root-soil composite and its resistance to pullout and shear forces, as well as its influence on slope stability, we conducted on-site whole Moso bamboo pullout tests and in-situ shear tests using bespoke instruments on Moso bamboo of varying diameters in the landslide-prone area of Zhuangbian Village, Linglu Township, Yongtai County of Fuzhou. A universal testing machine was employed to conduct single-root pullout tests on roots of varying diameters within the on-site root-soil complex. The results reveal that the diameter of Moso bamboo influences its tensile strength during whole-plant pullout tests, with larger diameters exhibiting higher ultimate tensile and shear strengths. Both the Moso bamboo culm and rhizome play a crucial role in resisting pullout forces. Moreover, the diameter of individual Moso bamboo roots shows a linear positive correlation with the ultimate tensile force while tensile strength decreases with increasing root diameter. Regarding shear resistance, there is a positive correlation between Moso bamboo diameter and the shear strength of the root-soil composite. It is of great significance in theoretical and practical implications for analyzing the mechanical properties of Moso bamboo root-soil composite, understanding the mechanisms of geological disasters in Moso bamboo forest slopes, and enhancing the effectiveness of vegetation in slope protection. © 2024 Institute of Engineering Mechanics (IEM). All rights reserved.
Keyword ：
Moso bamboo Moso bamboo pullout pullout root root root-soil composite root-soil composite stable slope stable slope
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| GB/T 7714 | Zhong, X. , Jian, W. , Fan, X. et al. Mechanical properties of Moso bamboo root-soil composite based on field prototype testing; [基于现场原型测试的毛竹根土复合体力学性能研究] [J]. | Journal of Natural Disasters , 2024 , 33 (5) : 38-47 . |
| MLA | Zhong, X. et al. "Mechanical properties of Moso bamboo root-soil composite based on field prototype testing; [基于现场原型测试的毛竹根土复合体力学性能研究]" . | Journal of Natural Disasters 33 . 5 (2024) : 38-47 . |
| APA | Zhong, X. , Jian, W. , Fan, X. , Wu, Y. , Lin, Y. , Zhang, J. . Mechanical properties of Moso bamboo root-soil composite based on field prototype testing; [基于现场原型测试的毛竹根土复合体力学性能研究] . | Journal of Natural Disasters , 2024 , 33 (5) , 38-47 . |
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Landslides frequently occur in heavily vegetated areas of southeast Fujian Province due to typhoon rainstorms. Investigating the failure mechanisms and evolution patterns of landslides influenced by vegetation, rainfall, and strong winds is crucial for disaster mechanism, monitoring, and early warning of typhoon-induced landslides in densely vegetated regions. This study focuses on the Yangxie landslide in Yongtai County, Fujian Province, investigating response patterns and analysis methods for vegetated slope stability under wind-driven rain conditions. Pulling tests on moso bamboo and single-ring infiltration tests were conducted, integrating the Green-Ampt model and infinite side slope model. Detailed main results include: 1) Bamboo’s maximum wind resistance ranges from 18 m/s to 30 m/s, corresponding to wind forces of 8 to 11. 2) Soil infiltration capacity in the windward area increases with wind speed, remaining constant at 0–12 m/s but rising rapidly beyond 12 m/s. 3) The wetting front’s migration speed in the root-soil zone accelerates with increasing wind speed and rainfall. Typhoons disturb soil by swaying vegetation to create preferential flow, mainly accelerating the wetting front’s migration speed. Wind speed significantly impacts soil infiltration capacity under wind, rain, and vegetation interactions. 4) During typhoon rainstorms, wind loads enhance rainfall infiltration in the root-soil zone through vegetation, thereby speeding up the wetting front’s migration. This process is critical for typhoon-induced landslide occurrence and development. © 2024 Biodiversity Research Center Academia Sinica. All rights reserved.
Keyword ：
Aerodynamic loads Aerodynamic loads Bamboo Bamboo Disasters Disasters Infiltration Infiltration Landslides Landslides Rain Rain Slope protection Slope protection Soil testing Soil testing Tropics Tropics Wind stress Wind stress
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| GB/T 7714 | Lin, Bin-Qiang , Zhang, De-Sheng , Jian, Wen-Bin et al. Response of vegetated slope stability under wind-driven rain conditions [J]. | Rock and Soil Mechanics , 2024 , 45 (9) : 2765-2774 . |
| MLA | Lin, Bin-Qiang et al. "Response of vegetated slope stability under wind-driven rain conditions" . | Rock and Soil Mechanics 45 . 9 (2024) : 2765-2774 . |
| APA | Lin, Bin-Qiang , Zhang, De-Sheng , Jian, Wen-Bin , Dou, Hong-Qiang , Wang, Hao , Fan, Xiu-Feng . Response of vegetated slope stability under wind-driven rain conditions . | Rock and Soil Mechanics , 2024 , 45 (9) , 2765-2774 . |
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The infiltration-runoff process plays a crucial role in hydrological studies. The influences of rainfall patterns and slope gradients on the infiltration-runoff process are not yet fully understood, particularly under field conditions. In-situ monitoring and experiments were conducted to investigate the effects of a uniform rainfall pattern (UR, q = 17.5 mm h- 1 and q = 35 mm h- 1), the Chicago rainfall pattern (CR), and different slopes (beta = 5 degrees and 25 degrees) on the infiltration, runoff, and sediment yield. The CR pattern is a mathematical model used to simulate natural rainfall based on historical rainfall data for a specific region. The results show that the response times of both the volumetric water content (VWC) and matric suction are directly proportional to depth, whereas their magnitudes are inversely proportional. The soil water characteristic curve (SWCC) obtained using the van Genuchten (vG) model can be established based on monitoring data for the drying path. The rainwater transformation is altered by the CR pattern, prolonging the initial runoff time and reducing rainfall infiltration. The infiltration and runoff rate curves, which mirror the rainfall pattern, exhibit peak values that increase both the cumulative runoff and sediment yield. The runoff rate, shear stress, and hydraulic power are significantly increased by increasing the slope angle. This positively contributes to the runoff and sediment yield and reduces the rainfall infiltration. The soil water profile during infiltration can be qualitatively divided into three stages. A time correction parameter, which is highly related to the initial runoff time, is incorporated into the Kostiakov model to more precisely predict the infiltration process. This paper presents a novel approach for applying the CR pattern to hillslope hydrology. Our findings improve the understanding of the effects of rainfall patterns and gradients on rainwater transformation and sediment yield and provide a scientific reference for hydrological modelling.
Keyword ：
Artificial rainfall Artificial rainfall Chicago rainfall pattern Chicago rainfall pattern Rainfall response Rainfall response Runoff analysis Runoff analysis Unsaturated soil Unsaturated soil
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| GB/T 7714 | Chen, Ruimin , Dou, Hongqiang , Lin, Yunzhao et al. In-situ infiltration-runoff characterization of slopes under the influences of different rainfall patterns and slope gradients [J]. | CATENA , 2024 , 247 . |
| MLA | Chen, Ruimin et al. "In-situ infiltration-runoff characterization of slopes under the influences of different rainfall patterns and slope gradients" . | CATENA 247 (2024) . |
| APA | Chen, Ruimin , Dou, Hongqiang , Lin, Yunzhao , Liu, Qingling , Jian, Wenbin . In-situ infiltration-runoff characterization of slopes under the influences of different rainfall patterns and slope gradients . | CATENA , 2024 , 247 . |
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降雨作用下土坡基质吸力随时空而变化，直接影响土坡的瞬态稳定性分析。为研究降雨作用下土坡电导性能与基质吸力的时空变化与联系，通过人工降雨滑坡物理模型试验，将电阻率作为监测量与常规的含水率、基质吸力相结合，并在边坡模型上种植马尼拉草，研究植草边坡在均匀降雨、前小后峰和前峰后小这3种动态降雨模式下的入渗特征。研究结果表明：动态降雨模式下，降雨强度变化对土体电阻率和含水率均能产生影响，但都存在一定滞后性。降雨前边坡土体基质吸力、电阻率较高，随着深度的增加逐渐递减。降雨后表层土体基质吸力、电阻率出现较大跌幅，分布上呈现由浅层到深层逐渐增大态势。结合Keller改进的Archie拓展模型与VG模型，得到基于电阻率的残积土基质吸力计算模型，并用试验数据进行验证，结果较为合理，为非饱和残积土基质吸力的测量提供一种快速便捷的方法。研究成果有助于探究非饱和残积土边坡在不同降雨模式下的渗流特征，揭示了降雨作用下坡残积土的电导性能演化规律与基质吸力空间分布特征。
Keyword ：
入渗 入渗 基质吸力 基质吸力 残积土 残积土 滑坡 滑坡 电阻率 电阻率 降雨 降雨
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| GB/T 7714 | 林昀昭 , 简文彬 , 陈瑞敏 et al. 降雨作用下基于电导性能的土坡基质吸力时空变化试验研究 [J]. | 自然灾害学报 , 2024 , 33 (01) : 139-150 . |
| MLA | 林昀昭 et al. "降雨作用下基于电导性能的土坡基质吸力时空变化试验研究" . | 自然灾害学报 33 . 01 (2024) : 139-150 . |
| APA | 林昀昭 , 简文彬 , 陈瑞敏 , 康浩隆 , 章德生 . 降雨作用下基于电导性能的土坡基质吸力时空变化试验研究 . | 自然灾害学报 , 2024 , 33 (01) , 139-150 . |
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