ISSN 0016-7126 (Print)

ISSN 2587-8492 (Online)

In the article the interrelation between collection of water in the soil and stability of the slope upon occurrence of shallow landslides developed under effect of heavy rains are analyzed. It is noted that non-stability of mountain slopes is one of major problems of land management. The shallow landslides are classified as one of general landslide types in the mountainous landscapes. The topographic properties of the site are the major factor affecting the stability of slopes. The effect of mountain conditions on pressure of soils holes under long time heavy rains is modeled using the Darcy law which determines the conditions for occurrence of stable water flow in an unsaturated zone. The possibility of simplified solution of Darcy equation for calculating stable vertical water flow in an non-saturated zone is considered. The proposed approximated solution makes it possible to calculate the safety coefficient of slopes concerning the possibility of occurring shallow landslides due to heavy rains.

References:

1. Cleassens L. (2005) Modeling Land slide Dynamics in Forested Landscapes. PhD thesis.Wageningen University, 143 p. |

2. Gardner W.R. (1958) Some steady-state solutions of the unsaturated moisture flow equation with application to evaporation from a water table. Soil Sci, Volume 85, pp. 228–332. |

3. Krahn J., Fredlund D.G. (1972) On total, matrix and osmotic suction. Soil Science, Volume 114, no. 5, pp. 339–348. |

4. Kumar C.P., Seth S.M. (2001) Derivation of soil moisture retention characteristics from saturated hydraulic conductivity. Journ. of the Indian Society of soil Science, Volume 40, no. 4, pp. 653–657. |

5. Montgomery D.R., Dietrich W.E. (1994) A physically based model for the topographic control on shallow land sliding. Water Resour. Res., Volume 30, pp. 1153–1171. |

6. Rockhold M.L., Simmons C.S., Fayer M.J. (1997) An analytical solution technique for one-dimensional, steady vertical water flow in layered soils. Water Resour. Res., Volume 33, pp. 897–902. |

7. Sidle R.C. (1992) A theoretical model of the effects of timber harvesting on slope stability. Water Resour. Res., Volume 28(7), pp. 1897–1910. |

8. Talebi A., Vijlenhoet R., Troch P.A. (2007) Soil moisture storage and hill slope stability. Natural Hazards and each system Sciences, Volume 7, pp. 523–534. |

9. Van Beek H. (2002) Assessment of the influence of changes in land use and climate on landslide activity in a Mediterranean environment. PhD thesis. Utrecht University, |

10. Wikinson P.L., Anderson M.G. (2000) Design and application of an automated non-circular slip surface search within a combined hydrology and stability model (CHASM). Hydrol. Process., Volume 14, pp. 2003–2017. |

11. Wikinson P.L., Anderson M.G., Lloyd D.M., Renaud J.P. (2002) An integrated hydrological model for rain-induced landslide prediction. Earth surf. Process. Landforms., Volume 27, pp. 1285–1297. |

12. Wu W., Slide R.C. (1995) A distributed slope stability model for steep forested basins. Water Resour. Res., Volume 31(8), pp. 2097–2110. |

(2016) Interrelation of water accumulation in soil and stability of slopes upon shallow landslides caused by heavy rains. Geodesy and cartography = Geodezia i Kartografia, (4), pp. 7–9. (In Russian). DOI: 10.22389/0016-7126-2016-910-4-7-9 |