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High K and Ca Chemical Erosion Triggered by Physical Erosion in a Watershed of the High Himalaya of Nepal

Abstract : The Khudi river in Nepal is an example of a basin undergoing intense physical erosion by landslide under very wet monsoonal conditions. Although under such a regime, dissolved element concentrations are expected to during the monsoon, we observe marked increases in dissolved K and Ca during flood events. These peaks in K and Ca concentrations are well correlated with increases of suspended load by an order of magnitude. The data suggest that release of K and Ca is enhanced by physical erosion and rock disaggregation events during sediment transfer.
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Guillaume Morin, Christian France-Lanord, Ananta Gajurel, Florian Gallo, Jérôme Lavé. High K and Ca Chemical Erosion Triggered by Physical Erosion in a Watershed of the High Himalaya of Nepal. Procedia Earth and Planetary Science, Elsevier, 2014, 10, pp.292 - 296. ⟨10.1016/j.proeps.2014.08.067⟩. ⟨hal-01766422⟩

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