Water quality challenges associated with industrial logging of a karst landscape: Guadalcanal, Solomon Islands

Albert, Simon; Deering, Nathaniel; Tongi, Scravin; Nandy, Avik; Kisi, Allen; Sirikolo, Myknee; Maehaka, Michael; Hutley, Nicholas; Kies-Ryan, Shaun; Grinham, Alistair

doi:10.1016/j.marpolbul.2021.112506

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…These concerns are compounded by the negative impacts of logging on both open freshwater sources and piped water systems (see also Global Witness 2018). With nearly 90% of rural Malaitans depending on either of these two for drinking water (MHMS 2015), this forms a public health hazard (but see Albert et al . 2021 for similar impacts on urban populations).…”

Section: Discussionmentioning

confidence: 99%

'Our happy hour became a hungry hour': logging, subsistence and social relations in Solomon Islands

Minter

Ploeg

2023

int. forest. rev.

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Solomon Islands has relied on highly unsustainable industrial logging since the 1980s. While the development narrative around logging emphasizes its macro-economic importance, it structurally overlooks the impacts on local people's lives. Based on 200 qualitative interviews conducted in 25 villages and 14 logging operations in Malaita Province between 2016 and 2019, this paper demonstrates that the impacts of logging on subsistence and social relations are systemic rather than incidental. By making use of interview quotes, the paper gives voice to rural Solomon Islanders. The results show that the logging industry fails to generate lasting local benefits, while unsustainable logging practices undermine subsistence livelihoods, especially fisheries. Logging triggers conflict that long outlasts the operations themselves, causes sexual exploitation, facilitates excessive alcohol use and reinforces gender disparities by stru cturally excluding women from decision-making and benefit-sharing. This paper calls for a stronger focus on the social impacts of logging in forestry science, policy and practice.

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Section: Discussionmentioning

confidence: 99%

'Our happy hour became a hungry hour': logging, subsistence and social relations in Solomon Islands

Minter

Ploeg

2023

int. forest. rev.

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“…2014; Albert et al, 2021). Likewise, rainfall variability with increasing risk due to climate change, can cause extreme flows (Lehmann et al, 2015;Palmer and Räisänen, 2002) resulting in significant economic, environmental, and life losses (Gaume et al, 2009;Grinham et al, 2012), as well as an increasing risk of extreme drought events into the future (Park et al, 2021;Li et al, 2016).…”

mentioning

confidence: 99%

Adaptively monitoring streamflow using a stereo computer vision system

Hutley

Beecroft²,

Wagenaar³

et al. 2022

Preprint

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Abstract. The gauging of free surface flows in waterways provides the foundation for monitoring and managing the water resources of built and natural environments. A significant body of literature exists around the techniques and benefits of optical surface velocimetry methods to estimate flows in waterways without intrusive instruments or structures. However, to date the operational application of these surface velocimetry methods has been limited by site configuration and inherent challenging optical variability across different natural and constructed waterway environments. This work demonstrates a significant advancement in the operationalisation of non-contact stream discharge gauging applied in the computer vision stream gauging (CVSG) system through the use of methods for remotely estimating water levels and adaptively learning discharge ratings over time. A cost-effective stereo camera-based stream gauging device (CVSG device) has been developed for streamlined site deployments and automated data collection. Evaluations between reference state-of-the-art discharge measurement technologies using DischargeLab (using surface structure image velocimetry), Hydro-STIV (using space-time image velocimetry), ADCPs (acoustic doppler current profilers), and gauging station discharge ratings demonstrated that the optical surface velocimetry methods were capable of estimating discharge within best available measurement error margins of 5–15 %. Furthermore, results indicated model machine learning approaches leveraging data to improve performance over a period of months at the study sites produced a marked 5–10 % improvement in discharge estimates, despite underlying noise in stereophotogrammetry water level or optical flow measurements. The operationalisation of optical surface velocimetry technology, such as CVSG, offers substantial advantages towards not only improving the overall density and availability of data used in stream gauging, but also providing a safe and non-contact approach for effectively measuring high flow rates while providing an adaptive solution for gauging streams with non-stationary characteristics.

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Jon Brodie Memorial: The sources, fates and consequences of pollutants in tropical shelf systems

Robson

Lewis

Kroon

et al. 2022

Marine Pollution Bulletin

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Water quality challenges associated with industrial logging of a karst landscape: Guadalcanal, Solomon Islands

Cited by 6 publications

References 29 publications

'Our happy hour became a hungry hour': logging, subsistence and social relations in Solomon Islands

'Our happy hour became a hungry hour': logging, subsistence and social relations in Solomon Islands

Adaptively monitoring streamflow using a stereo computer vision system

Jon Brodie Memorial: The sources, fates and consequences of pollutants in tropical shelf systems

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