Evaluation of landslide hazard level on spatial pattern of Tanah Datar Regency

Indang Dewata,Iswandi Umar,R Haigh,A Hakam,L Comfort,F.A Ismail

doi:10.1051/matecconf/201822903006

Abstract

Natural disasters have caused much harm to human life. Migration through disaster based planning is one way to minimize risks. The purpose of this study is to evaluate the level of landslide hazard in the planning of spatial pattern in Tanah Datar Regency. To determine the landslide hazard level using the scoring method through the overlay of a thematic map. Indicators used are slope, rainfall, soil type, geology, landform, and land use. Furthermore, evaluation of landslide hazard on spatial planning is determined by overlaying hazard level maps with land use plans in spatial pattern planning. The results showed that the 26% landslide hazard rate was a high danger level, 46% moderate hazard level, and 38% low hazard level. In addition, hazard level evaluation of spatial patterns resulted in approximately 37.3% planning for residential areas having high hazard levels. Therefore, it is necessary to revise the pattern of regional space and include the element of disaster in the planning of spatial pattern.

Highlights

Indonesia has a humid-tropical climate with high rainfall intensity
Christiadi (2006) said landslides can be affected by several factors, like geological conditions, hydrology, topography, climate, and land use
Tanah Datar Regency is an area with relatively rugged topography with high rainfall

Summary

Introduction

Indonesia has a humid-tropical climate with high rainfall intensity. According to Utoyo et al (2001) and Canuti et al (2003), landslides have caused by high rainfall, but change the characteristics of the region and the human activities can cause a landslide. Landslide often occurs and destroying settlements as well as other facilities and infrastructure. This led to the loss of property and the soul of the inhabitants who lived in the area, so that the necessary realignment of settlements into the area of the non-avalanche (Virdin, 2001; Syahrin, 2003; Syriac and Marisa, 2005; and Martono et al, 2005)

Objectives

Results

Conclusion