The protection of ecological functions of forested swamps and peatlands is the subject of legal and regulatory measures. In Quebec and elsewhere in Canada, wood harvesting is carried out on swamps and peatlands of merchantable forests. What is the impact of forestry practices on these wetlands hydrological functions such as sediment retention, groundwater recharge, flood reduction and low flow augmentation? The answer to this question is complex as the contribution of wetlands to these hydrological functions vary with each wetland type as underlined by the experts. With the aim of ascertaining the contribution of wetlands, and to infer the effects of forest management on forested swamps and peatlands, we carried out a literature review. The existing literature reviews only partially cover the subject or in the case of peatlands, they mainly consider drained sites. In this review, the links between the hydrologic functions and forest harvesting are treated by category of wetlands to take into account their anticipated specific contribution.