C.K Pithawalla College Of Engg. & Tech. Hydrology And Water Resources Enigineering

INDIAN RIVERS,FLOOD AND CAUSES OF FLOODS Group :13 Pathan Aamir Parekh Kedar Munshi Faiz Vansadiya Abhiraj

INDIAN RIVERS OVER VIEWan rivers overview Himalayan and Karkoram Ranges Vindhyas, Satpuras, Central Plateau Western Ghats India Arabian Ocean Bay of Bengal

The mother of Indian rivers- Ganga

Ganga is born in the Gangotri glacier at the foothills of the Himalayas (14000 ft) high up in the Himalaya Mountains of Uttaranchal. Gaumukh is the giant ice-cave from where the Ganga originates The first town she reaches on leaving the mountains is Rishikesh. At this point she is wider and slower. She becomes a ‘real’ river, no more the turbulent stream that flows through canyons and ravines Her main flow is through the Gangetic plain: the vast flat land that stretches from the north to south to the state of Uttar Pradesh and from its West all the way to the Eastern state of West Bengal. She is a source of water for agriculture, passing through famous towns such as Varanasi. Finally, past Kolkata in the east, the Ganges reaches the ocean – creating one of the world largest river deltas and home to the beautiful Sundarban forests.

The Brahmaputra

The origin of Brahmaputra River is in southwestern Tibet as the Yarlung River. The river takes birth at the Mansarovar of the Himalayas, flows through Tibet, China, Burma, India and joins with River Ganges in Bangladesh. Called the Tsangpo in Tibet, it flows past the towns of Xigatse and Tsedang and then climbs north. It curves around a majestic mountain called the Namche Barwa, shortly before entering India. Along the Brahmaputra are a thousand chars or river islands. Several nomads live on them who wander from one island to another. Finally, passing through Bangladesh, it becomes the Padma river and enters the Bay of Bengal in the Sundarbans along with the Ganges.

River Kaveri – The Ganga Of South India

Kaveri starts as a small spring in Karnataka Talakaveri, high up in the mountains of the Brahmagiri mountains of the Western Ghats. At this spot stands a temple which has a tank filled with the river’s water. A little further down the Kaveri forks to form a rocky island called Srirangapatna; until the end of the 18th century this was the capital of the Mysore kingdom. It is believed that Lord Vishnu himself came and resided in these islands. At Sivasamudram the Kaveri tumbles down as a rapids and waterfalls, where the river plunges downward in a wonderful cascade to a depth of ft. She falls with tremendous force and her waters are used to generate hydroelectricity. Kaveri enters the sea in a triangle-shaped delta in Tamil Nadu. The delta is large and covers 14 lakh hectares of land. The ancient temple town of Tanjavur stands at the head of the delta.

The Narmada,rivers and the environment

The Narmada is born in a small tank called “Narmada Kund” on the Amarkantak Hill in Eastern Madhya Pradesh. The Kanha National Park lies close to the Narmada in the Maikal Plateau. Unusual species of birds and animals are found here. This is a protected area and was a declared a Tiger Reserve in The Sardar Sarovar project is part of a plan to take Narmada’s waters to states further away where there is little rainfall and not much water for people and crops. But the dangers if this plan materializes are many: Earthquakes and flood caused by this man made structure threaten the area around it. In response to these concerns, that the Narmada Bachao Andolan movement grew to try and answer questions like (i)Are big dams more dangerous than useful? (ii) Are there other ways of collecting water for drinking, irrigation and electricity? (iii) Will those who lose their homes be given land somewhere else?

INDIA FLOOD FORECASTING NETWORK COVERS MAJOR AND INTER STATE RIVER BASINS. 166 STATIONS :- INFLOW 27 & STAGE 139

FLOOD FORECASTING STATIONS INDIA GANGAB’PUTRAWEST FLOWING GODAVARIEASTERN RIVERS KRISHNAMAHANADIBARAK

FLOOD MANAGEMENT ACTIVITIES Pre flood During flood Post flood

FLOOD FORECASTING BEGINNING STARTED BY CENTRAL WATER COMMISSION YEAR 1958 RIVER YAMUNA FORECASTING STATION DELHI RAILWAY BRIDGE BEGINNING STARTED BY CENTRAL WATER COMMISSION YEAR 1958 RIVER YAMUNA FORECASTING STATION DELHI RAILWAY BRIDGE INDIA

FLOOD FORECASTING AND WARNING DATA COLLECTION DATA TRANSMISSION DATA ANALYSIS & FORECAST FORMULATION DISSEMINATION OF FORECAST

FLOOD FORECASTING DISSEMINATION FORECAST CIVIL AUTHORITY OTHER AGENCIES PRESS, A I R DOORDARSHAN PRESS, A I R DOORDARSHAN OTHER USERS LOCAL REPRESENTATIVES OTHER USERS LOCAL REPRESENTATIVES

Nepal -deforestation More people More farmland needed Trees cut down Terraces made on hillsides Landslides and more run-off More risk of flooding

CAUSES OF FLOODS PRECIPITATION INADEQUATE CAPACITY (WITHIN BANKS) BANK EROSION AND SILTING LAND SLIDES TIDAL AND BACK WATER EFFECTS POOR DRAINAGE SNOW MELT AND GLACIAL OUT BURSTS

INDISCRIMINATE ENCROACHMENT INCREASING ECONOMIC AND DEVELOPMENTAL ACTIVITIES IN FLOOD PLAINS LACK OF REGULATIONS INADEQUATE DRAINAGE SYSTEM INADEQUATE MAINTENANCE LACK OF DISASTER PREPAREDNESS INDISCRIMINATE ENCROACHMENT INCREASING ECONOMIC AND DEVELOPMENTAL ACTIVITIES IN FLOOD PLAINS LACK OF REGULATIONS INADEQUATE DRAINAGE SYSTEM INADEQUATE MAINTENANCE LACK OF DISASTER PREPAREDNESS INCREASED VULNERABILITY CAUSES INCREASED VULNERABILITY CAUSES

FLOOD MANAGEMENT GEOGRAPHICAL328 FLOOD PRONE4012% PROTECTABLE3280% PROTECTED16.445% FLOOD AFFECTED – AVERAGE7.7 – MAXIMUM17.5(1978) – MINIMUM1.5(1965) GEOGRAPHICAL328 FLOOD PRONE4012% PROTECTABLE3280% PROTECTED16.445% FLOOD AFFECTED – AVERAGE7.7 – MAXIMUM17.5(1978) – MINIMUM1.5(1965) INDIA AREA (M. Ha)

FLOOD MANAGEMENT INDIA FLOOD PRONE AREA - 40 M.Ha. OTHER STATES 43.9% OTHER STATES 43.9% UTTAR PRADESH 21.90% UTTAR PRADESH 21.90% BIHAR 12.71% BIHAR 12.71% ASSAM 9.40% ASSAM 9.40% WEST BENGAL 7.91% WEST BENGAL 7.91% ORISSA 4.18% ORISSA 4.18%

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