Flood Management Strategy for Ganga Basin Through Storage
Flood Management Strategy for Ganga Basin through Storage by N. K. Mathur, N. N. Rai, P. N. Singh Central Water Commission Introduction The Ganga River basin covers the eleven States of India comprising Bihar, Jharkhand, Uttar Pradesh, Uttarakhand, West Bengal, Haryana, Rajasthan, Madhya Pradesh, Chhattisgarh, Himachal Pradesh and Delhi. The occurrence of floods in one part or the other in Ganga River basin is an annual feature during the monsoon period. About 24.2 million hectare flood prone area Present study has been carried out to understand the flood peak formation phenomenon in river Ganga and to estimate the flood storage requirements in the Ganga basin The annual flood peak data of river Ganga and its tributaries at different G&D sites of Central Water Commission has been utilised to identify the contribution of different rivers for flood peak formations in main stem of river Ganga. Drainage area map of river Ganga Important tributaries of River Ganga Southern tributaries Yamuna (347703 sq.km just before Sangam at Allahabad) Chambal (141948 sq.km), Betwa (43770 sq.km), Ken (28706 sq.km), Sind (27930 sq.km), Gambhir (25685 sq.km) Tauns (17523 sq.km) Sone (67330 sq.km) Northern Tributaries Ghaghra (132114 sq.km) Gandak (41554 sq.km) Kosi (92538 sq.km including Bagmati) Total drainage area at Farakka – 931000 sq.km Total drainage area at Patna - 725000 sq.km Total drainage area of Himalayan Ganga and Ramganga just before Sangam– 93989 sq.km River Slope between Patna and Farakka about 1:20,000 Rainfall patten in Ganga basin
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