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Identifying recurrent and persistent landslides using satellite imagery and deep learning: A 30-year analysis of the Himalaya (2024)
Journal Article
Chen, T. K., Kincey, M. E., Rosser, N. J., & Seto, K. C. (2024). Identifying recurrent and persistent landslides using satellite imagery and deep learning: A 30-year analysis of the Himalaya. Science of the Total Environment, 922, Article 171161. https://doi.org/10.1016/j.scitotenv.2024.171161

This paper presents a remote sensing-based method to efficiently generate multi-temporal landslide inventories and identify recurrent and persistent landslides. We used free data from Landsat, nighttime lights, digital elevation models, and a convolu... Read More about Identifying recurrent and persistent landslides using satellite imagery and deep learning: A 30-year analysis of the Himalaya.

Modelling post-earthquake cascading hazards: Changing patterns of landslide runout following the 2015 Gorkha earthquake, Nepal (2022)
Journal Article
Kincey, M., Rosser, N., Densmore, A., Robinson, T., Shrestha, R., Pujara, D., …Arrell, K. (2023). Modelling post-earthquake cascading hazards: Changing patterns of landslide runout following the 2015 Gorkha earthquake, Nepal. Earth Surface Processes and Landforms, 48(3), 537-554. https://doi.org/10.1002/esp.5501

Coseismic landslides represent the first stage of a broader cascading sequence of geohazards associated with high-magnitude continental earthquakes, with the subsequent remobilization of coseismic landslide debris posing a long-term post-seismic lega... Read More about Modelling post-earthquake cascading hazards: Changing patterns of landslide runout following the 2015 Gorkha earthquake, Nepal.

Improving above ground biomass estimates of Southern Africa dryland forests by combining Sentinel-1 SAR and Sentinel-2 multispectral imagery. (2022)
Journal Article
Ruusa, M., Rosser, N., & Donoghue, D. (2022). Improving above ground biomass estimates of Southern Africa dryland forests by combining Sentinel-1 SAR and Sentinel-2 multispectral imagery. Remote Sensing of Environment, 282, Article 113232. https://doi.org/10.1016/j.rse.2022.113232

Having the ability to make accurate assessments of above ground biomass (AGB) at high spatial resolution is invaluable for the management of dryland forest resources in areas at risk from deforestation, forest degradation pressure and climate change... Read More about Improving above ground biomass estimates of Southern Africa dryland forests by combining Sentinel-1 SAR and Sentinel-2 multispectral imagery..

Identification of floodwater source areas in Nepal using SCIMAP‐Flood (2022)
Journal Article
Pearson, C., Reaney, S., Perks, M., Hortobagyi, B., Rosser, N., & Large, A. (2022). Identification of floodwater source areas in Nepal using SCIMAP‐Flood. Journal of Flood Risk Management, 15(4), Article e12840. https://doi.org/10.1111/jfr3.12840

Practical approaches for managing flooding from fluvial sources are moving away from mitigation solely at the point of impact and towards integrated catchment management. This considers the source areas, flow pathways of floodwaters and the locations... Read More about Identification of floodwater source areas in Nepal using SCIMAP‐Flood.

An investigation of the combined effect of rainfall and road cut on landsliding (2022)
Journal Article
Pradhan, S., Toll, D., Rosser, N., & Brain, M. (2022). An investigation of the combined effect of rainfall and road cut on landsliding. Engineering Geology, 307, Article 106787. https://doi.org/10.1016/j.enggeo.2022.106787

The reduction of soil suction and consequent loss of shear strength due to infiltration is known to trigger shallow landslides during periods of concentrated rainfall. In the mountainous terrain of Nepal, the risk of shallow rainfall-induced landslid... Read More about An investigation of the combined effect of rainfall and road cut on landsliding.

Remote sensing for monitoring tropical dryland forests: A review of current research, knowledge gaps and future directions for Southern Africa (2022)
Journal Article
David, R., Rosser, N. J., & Donoghue, D. N. (2022). Remote sensing for monitoring tropical dryland forests: A review of current research, knowledge gaps and future directions for Southern Africa. Environmental Research Communications, 4(4), https://doi.org/10.1088/2515-7620/ac5b84

Climate change, manifest via rising temperatures, extreme drought, and associated anthropogenic activities, has a negative impact on the health and development of tropical dryland forests. Southern Africa encompasses significant areas of dryland fore... Read More about Remote sensing for monitoring tropical dryland forests: A review of current research, knowledge gaps and future directions for Southern Africa.

Changing Significance of Landslide Hazard and Risk After The 2015 Mw 7.8 Gorkha, Nepal Earthquake (2021)
Journal Article
Rosser, N., Kincey, M., Oven, K., Densmore, A., Robinson, T., Pujara, D., …Dhital, M. (2021). Changing Significance of Landslide Hazard and Risk After The 2015 Mw 7.8 Gorkha, Nepal Earthquake. Progress in disaster science, 10, Article 100159. https://doi.org/10.1016/j.pdisas.2021.100159

The 2015 Mw 7.8 Gorkha, Nepal Earthquake triggered in excess of 20,000 landslides across 14 districts of Central and Western Nepal. Whilst the instantaneous impact of these landslides was significant, the ongoing effect of the earthquake on changing... Read More about Changing Significance of Landslide Hazard and Risk After The 2015 Mw 7.8 Gorkha, Nepal Earthquake.

Evolution of coseismic and post‐seismic landsliding after the 2015 Mw 7.8 Gorkha earthquake, Nepal (2021)
Journal Article
Kincey, M. E., Rosser, N. J., Robinson, T. R., Densmore, A. L., Shrestha, R., Pujara, D. S., …Swirad, Z. M. (2021). Evolution of coseismic and post‐seismic landsliding after the 2015 Mw 7.8 Gorkha earthquake, Nepal. Journal of Geophysical Research: Earth Surface, 126(3), Article e2020JF005803. https://doi.org/10.1029/2020jf005803

Coseismic landslides are a major hazard associated with large earthquakes in mountainous regions. Despite growing evidence for their widespread impacts and persistence, current understanding of the evolution of landsliding over time after large earth... Read More about Evolution of coseismic and post‐seismic landsliding after the 2015 Mw 7.8 Gorkha earthquake, Nepal.

Cosmogenic exposure dating reveals limited long-term variability in erosion of a rocky coastline (2020)
Journal Article
Swirad, Z. M., Rosser, N. J., Brain, M. J., Rood, D. H., Hurst, M. D., Wilcken, K. M., & Barlow, J. (2020). Cosmogenic exposure dating reveals limited long-term variability in erosion of a rocky coastline. Nature Communications, 11, Article 3804. https://doi.org/10.1038/s41467-020-17611-9

Predicted sea-level rise and increased storminess are anticipated to lead to increases in coastal erosion. However, assessing if and how rocky coasts will respond to changes in marine conditions is difficult due to current limitations of monitoring a... Read More about Cosmogenic exposure dating reveals limited long-term variability in erosion of a rocky coastline.

Emergent characteristics of rockfall inventories captured at a regional scale (2020)
Journal Article
Benjamin, J., Rosser, N., & Brain, M. (2020). Emergent characteristics of rockfall inventories captured at a regional scale. Earth Surface Processes and Landforms, 45(12), 2773-2787. https://doi.org/10.1002/esp.4929

High-resolution rockfall inventories captured at a regional scale are scarce. This is partly owing to difficulties in measuring the range of possible rockfall volumes with sufficient accuracy and completeness, and at a scale exceeding the influence o... Read More about Emergent characteristics of rockfall inventories captured at a regional scale.

The Importance of Monitoring Interval for Rockfall Magnitude-Frequency Estimation (2019)
Journal Article
Williams, J., Rosser, N., Hardy, R., & Brain, M. (2020). The Importance of Monitoring Interval for Rockfall Magnitude-Frequency Estimation. Journal of Geophysical Research: Earth Surface, 124(12), 2841-2853. https://doi.org/10.1029/2019jf005225

The frequency distribution of rockfall sizes ('magnitude-frequency') is important for erosion and hazard modeling. This typically follows a power law, with few larger rockfalls compared to more numerous small events. Advances in LiDAR hardware and al... Read More about The Importance of Monitoring Interval for Rockfall Magnitude-Frequency Estimation.

The spatial and temporal influence of cloud cover on satellite-based emergency mapping of earthquake disasters (2019)
Journal Article
Robinson, T., Rosser, N., & Walters, R. (2019). The spatial and temporal influence of cloud cover on satellite-based emergency mapping of earthquake disasters. Scientific Reports, 9, Article 12455. https://doi.org/10.1038/s41598-019-49008-0

The ability to rapidly access optical satellite imagery is now an intrinsic component of managing the disaster response that follows a major earthquake. These images provide synoptic data on the impacts, extent, and intensity of damage, which is esse... Read More about The spatial and temporal influence of cloud cover on satellite-based emergency mapping of earthquake disasters.

Simple rules to minimise exposure to coseismic landslide hazard (2019)
Journal Article
Milledge, D., Densmore, A., Bellugi, D., Rosser, N., Watt, J., Li, G., & Oven, K. (2019). Simple rules to minimise exposure to coseismic landslide hazard. Natural Hazards and Earth System Sciences, 19(4), 837-856. https://doi.org/10.5194/nhess-19-837-2019

Landslides constitute a hazard to life and infrastructure and their risk is mitigated primarily by reducing exposure. This requires information on landslide hazard on a scale that can enable informed decisions. Such information is often unavailable t... Read More about Simple rules to minimise exposure to coseismic landslide hazard.

Identifying mechanisms of shore platform erosion using Structure-from-Motion (SfM) photogrammetry (2019)
Journal Article
Swirad, Z., Rosser, N., & Brain, M. (2019). Identifying mechanisms of shore platform erosion using Structure-from-Motion (SfM) photogrammetry. Earth Surface Processes and Landforms, 44(8), 1542-1558. https://doi.org/10.1002/esp.4591

Shore platforms control wave energy transformation which, in turn, controls energy delivery to the cliff toe and nearshore sediment transport. Insight into shore platform erosion rates has conventionally been constrained at mm-scales using micro-eros... Read More about Identifying mechanisms of shore platform erosion using Structure-from-Motion (SfM) photogrammetry.

Controls on the geotechnical response of sedimentary rocks to weathering (2019)
Journal Article
de Vilder, S., Brain, M., & Rosser, N. (2019). Controls on the geotechnical response of sedimentary rocks to weathering. Earth Surface Processes and Landforms, 44(10), 1910-1929. https://doi.org/10.1002/esp.4619

Weathering reduces the strength of rocks and so is a key control on the stability of rock slopes. Recent research suggests that the geotechnical response of rocks to weathering varies with ambient stress conditions resulting from overburden loading a... Read More about Controls on the geotechnical response of sedimentary rocks to weathering.

Intertidal boulder-based wave hindcasting can underestimate wave size: Evidence from Yorkshire, UK (2019)
Journal Article
Kennedy, D. M., Woods, J. L., Naylor, L. A., Hansom, J. D., & Rosser, N. J. (2019). Intertidal boulder-based wave hindcasting can underestimate wave size: Evidence from Yorkshire, UK. Marine Geology, 411, 98-106. https://doi.org/10.1016/j.margeo.2019.02.002

Large boulder-size clasts can represent important archives of high energy erosional wave activity at the coast. From tropical coral reefs to high-latitude eroding cliffs, boulders have been used to hindcast the frequency and magnitude (height) of wav... Read More about Intertidal boulder-based wave hindcasting can underestimate wave size: Evidence from Yorkshire, UK.

Use of scenario ensembles for deriving seismic risk (2018)
Journal Article
Robinson, T., Rosser, N., Densmore, A., Oven, K., Shrestha, S., & Guragain, R. (2018). Use of scenario ensembles for deriving seismic risk. Proceedings of the National Academy of Sciences, 115(41), E9532-E9541. https://doi.org/10.1073/pnas.1807433115

High death tolls from recent earthquakes show that seismic risk remains high globally. While there has been much focus on seismic hazard, large uncertainties associated with exposure and vulnerability have led to more limited analyses of the potentia... Read More about Use of scenario ensembles for deriving seismic risk.

Transferability of a calibrated numerical model of rock avalanche run-out: application to 20 rock avalanches on the Nuussuaq Peninsula, West Greenland (2018)
Journal Article
Benjamin, J., Rosser, N., Dunning, S., Hardy, R., Kelfoun, K., & Szczuciński, W. (2018). Transferability of a calibrated numerical model of rock avalanche run-out: application to 20 rock avalanches on the Nuussuaq Peninsula, West Greenland. Earth Surface Processes and Landforms, 43(15), 3057-3073. https://doi.org/10.1002/esp.4469

Long run‐out rock avalanches are one of the most hazardous geomorphic processes, and risk assessments of the potential threat they pose are often reliant on numerical modelling of their potential run‐out distance. The development of such models requi... Read More about Transferability of a calibrated numerical model of rock avalanche run-out: application to 20 rock avalanches on the Nuussuaq Peninsula, West Greenland.