Seite - 1531 - in Book of Full Papers - Symposium Hydro Engineering

low discharge during operation period of project. Present paper describes hydraulic problems associated with design of diversion cum depletion tunnel. Methodology adopted to arrive at solutions for design parameters in selecting flood flow, tunnel flow capacity during diversion as well as depletion, transitions in shape, energy dissipater at tunnel exit and smooth return of flow to river downstream of the structure. 1.1. NEED FOR DIVERSION OF WATER Urban centers are providing job opportunities, educational facilities and better living, because of which people migrate to cities. The rate of population growth of metropolitan and urban cities of India is unprecedented. Mumbai being the capital city of the state of Maharashtra is also the commercial and financial capital of the country. Actual growth of city and forecast is shown in Figure. 1. Figure 1: Population Growth of Mumbai City 1.2. To meet increased demand of water of Mumbai urban agglomerate, a proposal of interlinking Damanganga and Panjal rivers is proposed. 1531