इन्दिरा गाँधी नहर किस बैराज से निकाली गई है, जो किन दो नदियों के संगम पर स्थित है?

Which multipurpose dam built across the Mahanadi River integrates water conservation with flood control?

The Matatila Hydel Project is located on which river and state?

The Hirakud Dam project is a multipurpose scheme intended for flood control, irrigation, and power generation. Across which river is it built?