How have monsoon changes affected salt yields in Kampot and Kep?

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Monsoon Pattern Shifts Impact Cambodian Salt Production in Kampot and Kep

Changing monsoon patterns, attributed to climate change, have significantly disrupted salt yields in Cambodia's Kampot and Kep provinces. In recent years, unusually heavy rainfall during the dry season has directly impacted the traditional solar evaporation process, leading to reduced harvests. This alteration in weather conditions poses a substantial challenge to the region's sea salt industry, which is heavily reliant on prolonged periods of dry, sunny weather for optimal production.
Disruption to Traditional Solar Evaporation

The traditional method of sea salt production in Kampot and Kep, practised for decades by approximately 141 producers, involves channelling seawater into shallow evaporation ponds. This process, which takes place primarily between October and May, relies on intense tropical sun to evaporate the water, leaving behind salt crystals collected by hand. However, recent years have seen an increase in heavy rainfall and high tides during this critical dry season, leading to flooding of these salt ponds. This inundation prevents the necessary evaporation, directly hindering the formation and collection of salt crystals.
Reduced Harvests and Production Variability

The impact of these altered weather patterns is evident in the fluctuating harvest figures. In 2025, persistent rainfall significantly disrupted production, resulting in a harvest of only around 30,000 metric tonnes of salt. In contrast, producers anticipate a much higher yield of approximately 75,000 metric tonnes for the current year, highlighting the dramatic variability caused by unpredictable weather. This dependence on weather conditions makes the industry particularly vulnerable to the effects of climate change.
Broader Implications for the Agricultural Sector

Cambodia's vulnerability to climate change extends beyond the salt industry, affecting its broader agricultural sector, which supports millions of farmers. The country ranks high globally in the Global Climate Risk Index due to its susceptibility to floods, heavy rainfall, droughts, and extreme weather events. These climate-related risks threaten agricultural output and the livelihoods dependent on it, underscoring the systemic challenges posed by a changing climate.

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How have monsoon changes affected salt yields in Kampot and Kep?

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