Confluence, a Des Moines-based landscape architecture, urban design and planning firm, has acquired two firms: Land Elements in Fargo, N.D., and Wolff Landscape Architecture in Chicago. “Increasing our office locations and capabilities is a natural next step in Confluence’s planned growth.” Chris Della Vedova, president and CEO of Confluence, said in a prepared release. Confluence now has eight offices and more than 70 team members in Des Moines, Kansas City, Sioux Falls, Chicago, Cedar Rapids, Minneapolis, Fargo and Omaha.