The Wareham Land Trust will host "River Ecology and Restoration," a presentation that will address clean water, water availability, habitats, and other topics, on Saturday, April 6, from 10 a.m. to 12 p.m. at the Wareham Free Library.

Beth Lambert, river restoration program manager for the Division of Ecological Restoration of Mass. Fish and Game, will present. An overview of the historic use of rivers in Massachusetts will be followed by a presentation of river restoration projects with "before" and "after" photos.

Other topics on tap include storm-water runoff, over-withdrawal of water, and how habitat fragmentation impacts river ecology.

Refreshments will be provided by Land Trust members. Admission is free. No pre-registration is required.

The Wareham Free Library is located at 69 Marion Road. For more information about the presentation, call the Wareham Land Trust at 508-295-0211.