The 2008 Wenchuan earthquake destroyed large areas of vegetation in the Baisha River and Longxi basins, Dujiangyan County, China. There were several debris flow events these mountainous river basins after 2008. Currently, damaged are various stages recovery. This recovery improves resistance slopes to both surficial erosion mass wasting. We introduce a probabilistic approach determining relationships between slope materials’ stability, model sediment (hydrological) connectivity index detect...

Based on plenty of references, such as monograph, journal, thesis and other document, this paper summarized the present research situation Chinese geological disaster. Although disaster has made some achievements in forecasting, monitoring early warning, risk assessment, prevention aspects, it still many problems, theories methods is weak, lack information processing capacity. This also put forward importance studying from basin system perspective carrying out comprehensive management

Compare to common river bed, the erosion and deposition of debris flow gully have a distinctive phenomenon except big changes scour depth thickness. Due its particularity, process deposition, variation longitudinal slope is hardly obtained from field survey observation. The paper analyzed research firstly, then prior probe surface elevation under erosion, laws with density, initial angle gull bed materials through flume experiments.

The upstream Fujiang River are famous for their high mountains and narrow canyons, which results in a conflict of interest between local residents land use. To make good use precious resources is meaningful work people government. Therefore, field surveys theoretical analysis were carried out the to explore land-use evaluation utilization advice. Firstly, we analyzed factors affect debris flow depositional area. Secondly, chose soil fertility quality, particle conservation, geological...

The deposition prediction of debris flow hazardous area is very important for organizing and implementing disaster prevention reduction. This paper selected the data base from laboratory experiments applied multiple regression statistical method to establish a series empirical calculation models delimiting areas on alluvial fan. predicting maximum length (Lc), width (B max ) thichness (Z 0 under condition different volumes (V), densities (r m slopes accumulation (θ d were establised. And...

The paper reviewed the research and progress of solid materials on gully system in world pointed out shortage it. On condition hydrodynamics, many papers available concentrated relationship between rainfall parameters debris flow occurrence, infiltration surface runoff; while or slope surface, a lot researches focused flume experiments to analyses initial process under hydrodynamic effect together with artificial rainfall. Base reviews previous, give some prospects conditions futures.

The distributions and reserves of the loosen materials in debris flow valley takes great effects to movement flow, especially ones will move toward downstream as by heavy rainfall. This paper Guojuanyan gully, located Hongkou village, Du jiangyan city, an example, through several times field investigations, making a distinguishing solid watershed. Then had been calculated rupture arcs method estimation model critical accumulation rate. comparison results minimum requirement this gully...

Sichuan Basin come into rainy season entirely in the early July, 2013, Dujiangyan city of Wenchuan strong earthquake district encountered a hundred-year rainstorm process, which raised numerous Secondary Mountain hazards as collapse, landslide and debris flow etc.Generally, high frequency flowresult loss life property disaster region delay rescue after happened local reconstruction.On 9 th , largest occurred Guojuanyan gully (abbreviation GJY below) Shenxigou watershed,...

Guojuanyan gully, which lies in the center of earthquake-stricken area Dujiangyan city, is a viscous debris flow gully post Wenchuan strong earthquake. This paper made deep analysis formation condition on base valley and characteristics firstly, then conducted calculation kinetic parameters, last parsed development tendency future posed prevention measures based its dangerous objects need to protect.

Solid materials distributed on the surface of watershed transform to debris flow under seepage effect is one most common disaster type in mountainous area, especially Longmen Fault regions, China. The high frequency debris-flow event takes a big menace local people’s safety life and properties directly, as well reconstruction work. Currently, more theory experiment researches are concentrated solid instability mechanism, initiation, movement process slope-gully system, but fewer research...

Debris flows is one of the most common natural disasters in mountainous areas, posing a seriously risk to local people’s life and property. It fundamental basis study criteria for movement solid materials subjected seepage flow surface purpose prevent this hazard. Therefore, mechanical analysis methods laboratory experiments were used effect on movable debris flow. First, definition was proposed. Then, geological model established considering saturated Finally, through analysis, formulas...