Comprehensive Analysis of Flooding in the Hinogawa River Catchment in Shiga, Japan

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

The Establishment and Discuss of the Vulnerability Assessment for Flood Risk

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

3D GIS Modeling of Soft Geo-Objects: Taking Rainfall, Overland Flow, and Soil Erosion as an Example

In physics, objects can be divided into rigid and soft objects according to the object deformation capacity. Similarly, geo-object can also be classified into rigid geo-objects (e.g., building, urban) and soft geo-objects (e.g., mudflow, water, soil erosion). There are three types of approaches for 3D GIS modeling, i.e., surface-based, volume-based, and hybrids in terms of geometry. These approaches are suitable for representing rigid geo-objects, but they are not suitable to simulate the intrinsic properties of the soft geo-object, i.e., dynamics and deformation. And so far there are few GIS modeling methods for simulation of soft geo-objects. GIS flow elements (FEs) and GIS soft voxels (SVs) were proposed for 3D modeling of soft geo-objects. GIS flow elements can realistically represent the dynamics and stochastics of soft geo-objects, while GIS soft voxels simulate deformation of soft geo-objects. The authors discuss the implementation and computer programming of GIS flow elements and GIS soft voxels in this study. GIS FE and SV have been successfully applied in a case study toward the simulation of the process of rainfall, overland flow, and soil erosion. A software system has been designed and developed, which has the functions of data management, model computation, and 3D simulation

NRCS Curve Number Employed Hydrologic Homogeneous Regionalization in Regional Flood Frequency Analysis

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Catchment Scale Comparison on Lumped Representation for a Distributed Sediment Runoff Model

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Hydrologic Precidtion of Climate Chante Impacts on Tone and Yodo River Basins

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Shear Strength Reduction in Progress of Shear Displacement on the Landslide Near Dam Reservoir

Landslides may cause enormous human casualties, economic losses, infrastructure damages and the change of physical environment and geomorphology. Landslides on the upstream of dam reservoir obviously occur when reservoir impoundment has affected groundwater level of the upstream slope that penetrates into the susceptible soil layers which can fall down to the reservoir. The falling landslide mass into reservoir would significantly reduce the reservoir capacity as sustainable water resource for human and agriculture needs. The study of shear strength reduction in landslide mass is important aspart of the landslide dynamics science which covers mobility after failure associated with landslide hazard level, risk assessment, landslide velocity and affected area. In this paper, the shear strength reduction in progress of shear displacement on the landslide near dam reservoir is obtained by means of ring shear tests. Examined samples were taken from the 2008 deep-seated large-scale landslide near Aratozawa reservoir that is located in Miyagi Prefecture, Japan. The observed data indicated that during eight months before landslide event on 14 June 2008, the Aratozawa reservoir was impounded significantly and caused high pore pressure in the suspected slip surface layer. The undrained cyclic loading tests and earthquake loading tests are conducted to explain the shear strength reduction in progress of shear displacement and high initial pore pressure from pre-failure state to the steady-state motion. The results of the tests implied that the sample from secondary collapse zone was the weakest specimen which is vulnerable to be mobilized in a long distant shear displacement. In addition, the ring shear test results indicated that the rapid shear strength reduction of landslide mass was mainly caused by initial high pore pressure and exacerbated by the 2008 Iwate-Miyagi inland earthquake as a main shock in the case of deep and large-scale landslide near Aratozawa dam reservoir

Vulnerability Analysis of Regional Flood Hazard Based on MODIS Imagery and Demographic Data in the Huaihe River Basin, China

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Complementary Information for Reducing Parameter Uncertainty in Distributed Rainfall-Runoff Modeling

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv