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This paper presents a new region-based preparatory factor, total flux ( TF), for landslide susceptibility models (LSMs). TF takes into account the topography and hydrology conditions upstream of each gridded data cell and represents the total flux of water in the stream. The results show that TF is strongly associated with the occurrence of landslides and is a good preparatory factor for LSM. Using TF instead of a drainage distance factor in I-Lan region in Taiwan shows an improvement in the accuracy of the cumulative percentage of landslide occurrence of 44 and 14 % for the top 1 and 10 % susceptible areas, respectively. This significant improvement in accuracy in these high-risk areas is critical for preventing and mitigating the economic and human losses due to landslides. [ABSTRACT FROM AUTHOR]

The aim of this study was to produce a map of landslide susceptibility zonation (LSZ) using analytic hierarchy process (AHP) for recognition of a hazardous prone zone in the Bojnurd region, northeast of Iran. A database included nine topographic, geomorphologic, and climatic parameters that affect landslide susceptibility produced by digitizing the elevation data from topographic maps and some spatial analyst procedures in GIS. Some rock falls and landslides were observed dominantly on the steep slopes of limestone formations. The study area were divided into five susceptibility zones, namely, very high, high, moderate, low, and negligible. It demonstrated that about 70.21 % of the region in the south and east are prone to moderate to very high levels of landslide susceptibility. According to landslides inventory map, the most occurred landslides had the well-corresponding with high and very high landslide susceptibility classes in the region. Based on empirical classification of the AHP, the precipitation, geology, land use, and slope were the most heavily weighted factors with weightings of 0.182, 0.176, 0.166, and 0.163, respectively. While based on the spatially crosschecking, the landslide events in the study area strongly correlated with geology and slope, which exhibited on the final LSZ map. [ABSTRACT FROM AUTHOR]