Investigating erosional processes and rate of erosion of a sea cliff in Hantsport, Nova Scotia
Bibliographic record
Abstract
Coastal erosion is a natural process that can become an issue when there is no space to accommodate the retreat of a coastline; this is the case in many coastal communities across Nova Scotia. Addressing issues such as erosional processes have become a priority as environmental disturbances are increasing in both magnitude and frequency which can threaten lives and infrastructure. Hantsport is a community in Nova Scotia, located along the coast of the Avon River estuary which empties into the Minas Basin. Recent studies on the Avon River have explored changes in bathymetry and sedimentation over time; however, specific coastal erosion studies in this area have not been done. Hantsport is unique as it is part of a macrotidal environment, with a tidal range of over 15 m, and has a long history of anthropogenic influence on the environment. For this study, sediment stratigraphy and hydrology, drone surveying, time lapse photography, ground penetrating radar, and community historical narratives were used to better understand how natural and anthropogenic processes influence coastal erosion.Sea cliffs parallel to Avon Street, Hantsport are composed of permeable post-glacial outwash sediment overlying impermeable glacial till, both of which are susceptible to oversteepening and vulnerable to wave, rain, and freeze-thaw induced failure. The contact between these strata dip towards the Avon River, a geometry that can result in the development of a glide plane that may lead to further sea cliff failure. Time lapse photography taken between June 2024 and January 2025, show that most failure is associated with high tide conditions that coincide with both storms (high wave energy) and rainfall.Winter temperatures and the establishment of a thin frozen surface layer can also produce a thin near-vertical cliff face that fails if the cliff base is eroded. Rainfall and thawing may further exacerbate this condition. Previously installed gabions and coastal hardening structures have slowed erosional processes; however, these structures have been significantly disturbed and in places removed by large storms and lack of maintenance. Where these structures are absent, erosion has accelerated. Areas of the coastline that lie perpendicular to wave fetch are especially vulnerable to continued and accelerated erosion.The coastline under study may require engineered structures to reduce the rate of erosion. A review of which approach is most compatible with the site is outside of the scope of this study though the rate of sea cliff retreat is significant enough to warrant immediate action.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".