Which risk significantly increases when a large dam is constructed across an active seismic fault?

💡 Explanation

When a large dam is constructed on an active fault, the increased water pressure within the reservoir pore spaces reduces effective stress on the fault because the Mohr-Coulomb failure criterion changes; leading to accelerated reservoir-induced seismicity. Therefore induced seismicity increases, rather than changes in sediment, methane level nor biodiversity which relate to unrelated mechanism.

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