Snježana Mihalić Arbanas

University of Zagreb Faculty of Mining, Geology and Petroleum Engineering

As identified by previous work, landslides present a significant hazard in the Umbria Region, Central Italy. We present a Weight of Evidence (WoE) and Random Forest (RF) approach for deriving landslide susceptibility maps (LSMs) for the defined slope units (SU) cartographic unit. Used input data in this study includes a layer containing 7360 SU wit...

The study presents a landslide susceptibility assessment on a large scale in the City of Zagreb (Croatia). The susceptibility analysis was performed using the Weight of Evidence model in the pilot area (21 km²) and applying the obtained weight values for each class of conditioning factors in the study area (130 km²). The input data were LiDAR-based...

The Adriatic-Balkan Network (ABN) was established in January 2012 as one of regional networks in the framework of International Consortium on Landslides (ICL) and its 10th Anniversary was concluded with 5th Regional Symposium on Landslides in Adriatic-Balkan Region (ReSyLAB) in Rijeka, Croatia, in March 2022. The Adriatic-Balkan Network was formall...

The need for landslide maps of wider areas has increased with the understanding that proper planning will considerably decrease the construction and maintenance cost of structures. The main objective of the paper is to present types of data and information on landslides that can be derived from landslide inventory and landslide susceptibility maps...

Rock mass characterization is a very important part of engineering geological investigation. For a better understanding of the rock mass behaviour, it is crucially important to obtain as much as possible information about the discontinuity network, especially about orientation and the number of dominant discontinuity sets. The traditional methodolo...

A landslide inventory presents a detailed register of the distribution and characteristics of past landslides in a specific area. Landslide inventory maps and other maps such as landslide susceptibility, hazard and risk maps present an essential tool in landslide risk management, supporting authorities, practitioners and decision-makers in the more...

The Istrian Peninsula, in the western part of Croatia, belongs to an undeformed part of the Adriatic Plate. The central part of Istria is the area of the Eocene flysch basin, i.e. "Gray Istria", which is prone to weathering and active geomorphological processes. The siliciclastic rocks of the basin are homogeneous hemipelagic marls (Globigerina mar...

The objective of the study is to show that landslide conditioning factors derived from different source data give significantly different relative influences on the weight factors derived with statistical models for landslide susceptibility modelling and risk analysis. The analysis of the input data for large-scale landslide hazard assessment was p...

The Raspadalica rockfall is well known location with numerous rockfall occurrences from 100 m high limestone cliff in the past that caused significant damages and victims at the railway Buzet-Pula in Istria, Croatia. Structural and kinematic analysis of possible future rockfall were carried out following the modern approaches and recent techniques...

This paper presents a result of landslide inventory mapping at the Bednja Municipality and Lepoglava City study area in Hrvatsko Zagorje region, NW Croatia. The landslides were interpreted from the high resolution (30 cm) digital elevation model (DEM) and its derivatives (slope and contour map, hillshade). The DEM was interpolated from the point cl...

The objective of this study is a presentation of the landslide susceptibility assessment on a national scale for the Republic of Croatia using a heuristic approach. The effects of controlling factors on landslide susceptibility were estimated using the Fuzzy logic approach based on a multiclass overlay of landslide predictor maps.

This paper presents the application of Light Detection and Ranging (LiDAR) data for landslide identification and mapping in the pilot area at the Istria Penninsula (Croatia) and the analyses on the influence of expert knowledge on the quality of landslide inventory. Visual interpretation of landslides was carried out on high-resolution airborne las...

The scientific research project Methodology development for landslide susceptibility assessment for land-use planning based on LiDAR technology (LandSlidePlan, HRZZ IP-2019-04-9900), funded by the Croatian Science Foundation, deals with new and under-investigated subjects in respect of inventory mapping of small and shallow landslides and presents...

An innovative technique for detailed landslide inventory mapping is airborne laser scanning and LiDAR-derived DTMs in high resolution. LiDAR data used in this study was obtained in the framework of the “Methodology development for landslide susceptibility assessment for land use planning based on LiDAR technology (LandSlidePlan IP-2019-04-9900)” pr...

A preliminary landslide susceptibility analysis on a regional scale of 1:100 000 using bivariate statistics was conducted for the City of Karlovac. The City administration compiled landslide inventory used in the analysis based on recorded landslides from 2014 to 2019 that caused significant damage to buildings or infrastructures. Analyses included...

Field investigations and back-analyses of (re)activated landslides in the Rječina River Valley indicate prolonged intense rainfall and the rise of the groundwater table, often to the slope surface, which are common prerequisites for the occurrence of landslides in the valley. However, previous studies have never considered the transient process of...

Rockfalls are the most frequent and dangerous type of landslides, generating high economic and social damages in zones built in different types of rock mass. The high danger of rockfall occurrence mainly lies in high speed of the falling rock mass that is very difficult for any fast response in the protection of human lives, settlements and infrast...

This report summarizes the findings of a rapid damage and needs assessment that was led by the Government of Croatia, with technical assistance from the World Bank, following a series of earthquakes in December 2020. This assessment focuses on the December 29, 2020 earthquake. The assessment was carried out between January and March 2021, with data...

The purpose of this Joint Reconnaissance Report between EERI and StEER is to provide timely information on this earthquake, an overview of the hazard characteristics, and a summary of preliminary damage reports to buildings, bridges, roads, and other infrastructure. Moreover, key findings are also summarized with regard to geotechnical failures tha...

The small historical town in the middle part of Dalmatia, City of Omiš, Croatia, was threatened by numerous rockfall occurrences in the past that caused significant damage at residential structures and infrastructure. After several stages and design solutions completed in the past, installation of rockfall protection structures at the slopes above...

In this paper we described a part of scientific activities of the Croatian Landslide Group (CLG), World Centre of Excellence (WCoE) on Landslide Risk Reduction of the International Consortium on Landslide (ICL) for the period 2017–2020 including activities of IPL Projects IPL-2019 Rockfall Hazard Identification and Rockfall Protection in The Coasta...

In this paper scientific activities of the Croatian Landslide Group (CLG), World Centre of Excellence on Landslide Risk Reduction (WCoE) of the International Consortium on Landslides (ICL) for the period 2017–2020, are shortly described. The results of scientific research are presented through the fields of landslide science related to landslide id...

“From mapping to hazard and risk zonation” is Volume 2 of the book “Understanding and Reducing Landslide Disaster Risk”. The volume collects 54 articles covering five main general topics, including (i) landslide detection, recognition and mapping, (ii) landslide susceptibility assessment and spatial landslide modelling, (iii) landslide size statist...

The paper presents results of identification and mapping of the Prnjavor Čuntićki landslide reactivated in March 2018 due to intensive rainfalls in Croatia. The described investigations included conventional landslide field mapping and visual mapping using high resolution digital terrain model derived from data captured by Unmanned Aerial Vehicle (...

This paper presents the general characteristics and spatial distribution of the gullies formed in flysch deposits in the Dubračina River Basin, and the associated landslide phenomena initiated in gullies, based on the visual interpretation of 1 × 1 m LiDAR imagery. Two types of landslides are identified: debris slides and debris slide-debris flows....

This book is a part of ICL new book series “ICL Contribution to Landslide Disaster Risk Reduction” founded in 2019. Peer-reviewed papers submitted to the Fifth World Landslide Forum were published in six volumes of this book series. This book contains the followings: • Keynotes • Landslide detection, recognition and mapping • Landslide susceptibili...

The interpretation of landslide kinematics provides important information for those responsible for the management of landslide risk. This paper presents an interpretation of the kinematics of the slow-moving Kostanjek landslide, located in the urbanized area of the city of Zagreb, Croatia. The sliding material (very weak to weak marls, often cover...

The Vinodol Valley, situated in the northwestern Adriatic in Croatia, is characterized by complex geological and morphological conditions. Palaeogene flysch deposits form the inner parts of the valley, while the steep valley flanks are composed of Cretaceous and Palaeogene carbonate rocks. Flysch bedrock is mostly covered by diverse Quaternary depo...

This paper presents the potential of airborne LiDAR digital terrain model (DTM) for engineering geological mapping in geologically complex and forested area. The multipurpose, comprehensive engineering geological map is created for the pilot area (16.75 km 2) located in the Vinodol Valley, Croatia. Eight topographic datasets were derived from 1-m D...

The monitoring of landslides has a practical application for the prevention of hazards, especially in the case of large deep-seated landslides. Monitoring data are necessary to understand the relationships between movement and triggers, to predict movement, and to establish an early warning system. This paper compares two phenomenological models fo...

The Slani Potok gully (0.48 km2) is situated in the central part of the Vinodol Valley (64.57 km2) in Croatia, and it was formed in the Eocene flysch deposits. So far, the area of Slani Potok has been mainly referred in the scientific literature as being subjected to unusually intense soil erosion processes (i.e., ‘’excessive erosion’’), associated...

The paper shortly presents concept of landslide risk management with basic definitions of activities belonging to protection and recovery. The intention of the paper is to systematize measures of the Croatian government according to risk management framework. Two groups of measures undertaken by the Croatian Ministry of Construction and Physical Pl...

The objective of this study is preliminary national-scale assessment of the landslide hazard in Croatia using qualitative approach. Landslide risk analysis was done in the frame of Disaster Risk Assessment for the Republic of Croatia during 2018. Landslide risk assessment was carried out by the scientists from Croatian Landslide Group. As final res...

Soil erosion processes are a type of geological hazard. They cause soil loss and sediment production, landscape dissection, and economic damage, which can, in the long term, result in land abandonment. Thus, identification of soil erosion processes is necessary for sustainable land management in an area. This study presents the potential of visual...

Landslides in the Podsljeme area of the City of Zagreb cause significant economic losses, which have been increasing over the last several decades due to the urbanisation of hilly areas and the influence of climate changes. An airborne LiDAR digital terrain model (DTM) with a spatial resolution of 30 × 30 cm was used to prepare a landslide inventor...

The City of Omiš, Croatia, was threatened by numerous rockfall occurrences in the past that caused significant damages at residential structures and infrastructure. A several designs for rockfall protection structures were conducted in the past, and installation of protection structures was conducted from 2016 to 2018. During the final design perfo...

The aim of this paper is to present preliminary rockfall susceptibility assessment based on remote sensing and automated kinematic analysis for the steep slopes above the Town of Omiš. Collection of spatial data was performed by terrestrial laser scanning and unmanned aircraft vehicle to derivate high-resolution point cloud models. Split-FX and Clo...

Data on landslide locations in the Podsljeme area can be found in three historical landslide inventory maps. Inventory maps from 1979 and 2007 are made based on geomorphological fi eld mapping and historical records while an inventory map from 2017, compiled for the study area (21 km2), is based on LiDAR data acquired in December 2013. A comparison...

Rockfall, by definition a type of landslides that include detachment of the rock or several rock blocks, from mostly sub-vertical rock slope followed by rapid down-slope motion as free-falling, bouncing, rolling and sliding phases, represent a major hazard in areas characterized by steep slopes built in different rock masses. More than 40% of terri...

This paper describes numerical modeling of the Kostanjek landslide using the LS-Rapid software. The analyses using the LS-Rapid software were made for two different triggering factors i.e. excess of pore water pressure, and combination of pore excess water pressure and earthquake occurrence, and it was applied at two different landslide cases. In t...

Prediction of landslide movements with practical application for landslide risk mitigation is a challenge for scientists. This study presents a methodology for prediction of landslide movements using random forests, a machine learning algorithm based on regression trees. The prediction method was established based on a time series consisting of 2 y...

The 3rd Regional Symposium on Landslides in the Adriatic-Balkan Region (3rd ReSyLAB) was held in Ljubljana, Slovenia, from June 11 to 13, 2017, with 70 participants from nine countries (Austria, Bosnia and Hercegovina, Croatia, Czech Republic, Italy, Republic of Macedonia, Serbia, Slovenia, Spain)—scientists, engineers, researchers, students, exper...

In this paper the general design of the integrated monitoring system of the Kostanjek landslide (Zagreb, Croatia) will be briefly presented. A comprehensive automated real-time monitoring system has been installed as a part of the research activities in the Croatian-Japanese SATREPS FY2008 scientific project on landslides in 2011-2013. The monitori...

The Grohovo Landslide is located on the north-eastern slope of the Rječina Valley, Croatia and it was reactivated in 1996 at the location of the landslide from 19th century. In 2009 the Croatian-Japanese joint research project “Risk identification and Land-Use Planning for Disaster Mitigation of Landslides and Floods in Croatia” was initiated and t...

Sažetak: Zbog specifične geomorfologije, složene geološke građe, te uslijed nagle i često neodgovarajuće izgradnje građevina, na području podsljemenske zone grada Zagreba prisutan je problem vezan uz stabilnost padina. Brojna klizišta predstavljaju prijetnju lokalnom stanovništvu i imovini. Na inženjerskogeološke uvjete u podsljemenskoj zoni najveć...

Two neighboring countries in the southeastern region of Europe, Croatia, and Bosnia and Herzegovina (BIH), belong to the same geotectonic units of the Dinarides and to the Pannonian Basin, which influence relief types, lithology, and types of slope movements, i.e., landslides. The Dinarides are a mountain chain with a northwest-southeast direction...

A large landslide occurred near the Grohovo Village in outback of the City of Rijeka, Croatia, on 13 February 2014 after long term period of heavy rain. The movement of approximately 12 to 15 m down the slope caused the complete damage of the local road over the landslide body. The toe of the landslide reached the bank of the Valići Reservoir 250 m...

Open image in new windowSession 2.4 of the volume 2 in the proceedings of the WLF4 has been divided into 2 parts. This part includes all papers accepted for publication in the conference proceedings.

Open image in new windowA large landslide occurred near the Grohovo Village in outback of the City of Rijeka, Croatia, on 13 February 2014 after long term period of heavy rain. The preliminary surface observation was carried out immediately after sliding appearance enabled estimation of site condition, dimension of the landslide so as an assessment...

Landslides in the hilly zone of Medvednica Mt. were identified visually using LiDAR DTM with a spatial resolution of 15 × 15 cm. Acquisition of the LiDAR data was performed in December 2013, following an extreme precipitation period that resulted in numerous landslides. Topographic derivative datasets for interpreting landslide morphology were comp...

A large landslide occurred near the Grohovo Village in outback of the City of Rijeka, Croatia, on 13 February 2014 after long term period of heavy rain. The preliminary surface observation was carried out immediately after sliding appearance enabled estimation of site condition, dimension of the landslide so as an assessment of a hazard of further...

The Croatian-Japanese joint research Science and Technology Research Partnership for Sustainable Development (SATREPS) project ‘Risk Identification and Land-Use Planning for Disaster Mitigation of Landslides and Floods in Croatia’ was performed from 2009 to 2014. Key objectives of the project were landslides and floods hazard analysis and the devel...

In this paper scientific activities of the Croatian Landslide Group (CLG), World Centre of Excellence on Landslide Risk Reduction (WCoE) of the International Consortium on Landslide (ICL) for the period 2014-2017, are shortly described. The results of scientific research are presented through the fields of landslide science: landslide identificatio...

Prediction of landslide movements with practical application for landslide risk mitigation is a challenge for scientists. This study presents a methodology for prediction of landslide movements using random forests, a machine learning algorithm based on regression trees. The prediction method was established based on a time series data gathered by...

Weathering processes cause significant changes in the engineering properties of rocks. Slope instability in flysch rock formations along the northern Adriatic coast of Croatia is related to the effects of weathering on the shear strength of siltstones from the flysch rock mass. Therefore, changes in geotechnical properties according to weathering g...

The aim of this paper was identification of rock fall prone areas above the historical town of Omiš, located at the Adriatic coast in Croatia. Unstable areas were identified by kinematic analysis performed based on relative orientations of discontinuities and slope face. Input data was extracted from the surface model created from the high-resoluti...

Prediction of landslide movements with practical application for landslide risk mitigation is a challenge for scientists. This study presents a methodology for prediction of landslide movements using random forests, a machine learning algorithm based on regression trees. The prediction method was established based on a time series consisting of 2 y...

This paper describes the application of advanced technologies for landslide detection, mapping and monitoring in the City of Zagreb since 2010. Airborne Light Detection and Ranging (LiDAR) data are used to visually identify landslides in the Podsljeme Zone over an area of 180 km2 for the purpose of landslide inventory mapping. The total number of l...

The paper presents results of identification and mapping of the Valići Lake landslide reactivated in February 2014 due to intensive rainfalls. The described investigations included conventional engineering geological field mapping and innovative remote sensing mapping using high resolution digital elevation model, undertaken for interpretation of l...