Based on our field investigations of landslide hazards in the Wenchuan earthquake, some findings can be reported: (1) the multi-aspect terrain facing empty isolated mountains and thin ridges reacted intensely to the earthquake and was seriously damaged; (2) the slope angles of most landslides was larger than 45°. Considering the above disaster phenomena, the reasons are analyzed based on shakin...

in this paper, the effect of bedrock inclination on seismic performance of slopes is investigated. the study was conducted based on dynamic analysis of different slopes, evaluation of the earthquake acceleration in sliding mass, and calculating the permanent displacement of the slope, using newmark sliding block. the investigation indicates that variation of the bedrock inclination may cause th...

The nonhorizontal-model-layer (NHML) grid system is more accurate than the horizontal-model-layer grid system to describe groundwater flow in an unconfined sloping aquifer on the basis of MODFLOW-2000. However, the finite-difference scheme of NHML was based on the Dupuit-Forchheimer assumption that the streamlines were horizontal, which was acceptable for slope less than 0.10. In this study, we...

We consider the problem of estimating for a given representer h the value lh(β) of a linear functional of the slope parameter β in functional linear regression, where scalar responses Y1, . . . , Yn are modeled in dependence of random functions X1, . . . , Xn. The proposed estimators of lh(β) are based on dimension reduction and additional thresholding. The minimax optimal rate of convergence o...

We consider pruning steps used in a branch-and-bound algorithm for veri ed global optimization. A rst-order pruning step was given by Ratz using automatic computation of a rst-order slope tuple [21, 22]. In this paper, we introduce a second-order pruning step which is based on automatic computation of a second-order slope tuple. We add this second-order pruning step to the algorithm of Ratz. Fu...

Due to the spatial variability of hydraulic properties, probabilistic slope seepage analysis becomes necessary. This study conducts a under rainfall, considering saturated conductivity. Through this, both commonly used Monte Carlo simulation method and proposed first-order stochastic moment approach are tested compared. The results indicate that is effective applicable flow processes in scenari...

Soil detachment is known as an important process in soil erosion and its quantification is necessary to establish a basic understanding of erosion. This study was carried out to find the best flow erosivity indicator(s) for predicting detachment rate at low slopes. For this purpose, 12 experiments including 6 flow discharges (75, 100, 125, 150, 175 and 200 ml/s) and 2 slope gradients (1.5 and 2...