| Natural Factors
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| 6.3.1.6 |
The preservation of archaeological sites in Hong Kong is also influenced by two natural, physical factors: topography and geomorphology. |
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| Topography
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| 6.3.1.7 |
The terrain of Hong Kong is characterised by steep mountains with sparse vegetation and precipitous slopes. Coupled with the prevailing climatic conditions of wet summer season and dry winter monsoon, this means that erosion plays a highly significant role in the creation (eg through exposure) and condition of archaeological deposits. |
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| Geomorphology
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| 6.3.1.8 |
The nature of the soils may affect the extent of archaeological preservation. Granitic soils are subjected to relatively rapid and intense weathering. Volcanic soils, on the other hand are comparatively less susceptible to weathering but prone to deflation particularly during the dry winter season. |
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| Others
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| 6.3.1.9 |
Another impact of lesser significance to the overall resource but nevertheless relevant is the effects of air pollution on the fabric of older and important historical buildings and monuments. The key effects which can be predicted are the erosion of stone by acid deposition (through rainfall and moisture which accumulates acidic pollutants such as sulphur dioxide and nitrogen dioxide) and the blackening of stone facades by soot and particulate matter emitted from industrial plant and road vehicle exhausts. No information has been identified in this review on the extent of damage caused by these impacts or the annual costs of rectifying it. |
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