Rates of bioturbation, i.e., the mixing of sediments by organisms, must be measured to analyse the importance of biological activity prior to a mining disturbance and can be evaluated from profiles of excess Pb-210 activity from cores, taking into account the variability in the sediment.
ويقدم المتعاقد إلى السلطة قبل مهلة كافية خطة للتعدين الاختباري.