Water quality challenges associated with industrial logging of a karst landscape: Guadalcanal, Solomon Islands
| Autor: | Alistair Grinham, Nicholas Hutley, Nathaniel Deering, Simon Albert, Avik Nandy, Myknee Sirikolo, Scravin Tongi, Allen Kisi, Michael Maehaka, Shaun Kies-Ryan |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Sinkhole Drainage basin Water supply 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Water Supply Water Quality parasitic diseases Humans 0105 earth and related environmental sciences geography geography.geographical_feature_category business.industry 010604 marine biology & hydrobiology Drinking Water Logging Sediment Karst Pollution Environmental science Water quality Melanesia business Water resource management Sediment transport Environmental Monitoring |
| Zdroj: | Marine pollution bulletin. 169 |
| ISSN: | 1879-3363 |
| Popis: | Human disturbance of karst landscapes in tropical volcanic islands present a unique challenge for understanding sediment transport to the coastal zone. Here we present the first evidence of urban drinking water quality impacts from industrial logging in the Solomon Islands. Despite only 6% of the Honiara's drinking water catchment being disturbed by logging, rhodamine dye tracers demonstrated complex karst sinkholes that led to high suspended sediment concentrations being transported from neighbouring Kovi catchment into the Kongulai water supply offtake point for Honiara. This has resulted in the exceedance of practical treatment thresholds of 20 NTU 9.5% of the time, leading to water supply for the majority of Honiara's residents being unavailable for 58 days in 2019. This work highlights the cost-benefit disparity between industrial logging yielding minimal short-term economic yields in comparison to on-going broader impacts of increased coastal sediment transport while restricting water supply to a developing nation's capital. |
| Databáze: | OpenAIRE |
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