Installation of new public art celebrating community and water began in Des Moines Water Works Park this week. Comprising 45 10-foot-tall poles illuminated with 12-inch globes, River Constellation emits a gentle ebb and flow of original music and light, encouraging visitors to wander through the sculpture immersed in light and sound. The site-responsive piece responds to the circuitous ribbons of Des Moines’ rivers and creates an intimate experience in the expansive landscape of the 1,500-acre park. The Des Moines Water Works Park Foundation commissioned Boston-based composer Beau Kenyon and Brooklyn-based sculptor Natalia Zubko earlier this year. The permanent work is funded privately with support from the Kyle J. and Sharon Krause Family Foundation. A dedication is expected in November.