Study on the Migration of Manganese in the Hyporheic Zone of a Reservoir

Abstract In order to study the laws of the spatial change of manganese in hyporheic zone, this paper takes Reservoir A as the actual research object, and analyzes the migration and change mechanism of manganese in the hyporheic zone by means of field sampling and data collection. The results show that the manganese content in the hyporheic zone of Reservoir A is changed rapidly after impoundment, and a new hyporheic zone is formed. When the hyporheic zone is closer to the surface water of the reservoir, the manganese content will stabilize faster. In the vertical direction, the hyporheic zone has a de-oxidation effect on manganese. The de-oxidation effects on manganese during wet period and dry period are 19.2% and 13.7% respectively. Within the hyporheic zone, the change of manganese content decreases gradually; while outside the hyporheic zone, the change of manganese contents increases gradually from the top to the bottom.