Fig. 8: Model of the seasonal changes associated with subglacial anastomosing drainage.
From: The seasonal evolution of subglacial drainage pathways beneath a soft-bedded glacier
a Summer drainage. An active braided system with both main and subsidiary channels, with the level of anastomosing related to surface melt, with water moving slowly into storage within the subglacial system because inputs are greater than discharge. b Spring drainage. c Autumn drainage. During spring and autumn most water flows in the main channels, and in autumn some water becomes isolated in small reservoirs. d Winter drainage. During negative degree days, discharge is very low. During the positive degree days, there is high discharge associated with surface meltwater and water being evacuated from subglacial storage, which will travel along the main channels.
