En Ppt Evs Swp Dam It 0

8/4/2019 En Ppt Evs Swp Dam It 0

1/20

Multi purpose river projects and Integrated water resources ManagementStd X CBSE

As per NCERT geography textbookContemporary India II

Dam it!


2/20

Villagers downstream celebrated and set off

fireworks

October 1963

Dakotas of the Indian Air Force dipped their wings overhead.

Pundit Nehru flicked on the switch of the powerhouse

and opened the sluice gates of the dam.

In his speech dedicating the dam to the nation,he called dams as the

Temple of modern India


3/20

Bhakra Dam

Which project are we talking about?


4/20

Was this the first water regulating structure to

be built in India?

Photo by Claire Arni and Oriole Henri

The Grand Anicut was built during the Chola Dynastyin the 1st / 2nd century A.D. to harness the waters of the

riverCauvery.

Made of stone, it is as long as 3 football fields

It is the oldest water regulating structure and is still

very much in use.


5/20

A dam is a barrier across flowing water

It obstructs, directs, or retards the flow of water. It usually creates a reservoir

Surplus water flows out overspillways

Sluice / Radial Gatescontrol the flow of water downstream (most gates today

are radial gates)

Power House

Long Distance Power Lines

Generator

Intake

Gate

Spillways

River

River

Reservoir

Turbine


6/20

Based on size Large dams (>15 meters)Major dams (over 150 meters in height)Sometimes also classified as low, medium and high.

Based on structure and material used Timber dams,

Arch gravity dams, Embankment dams or Masonry dams,

with several sub types.

Based on purpose- Saddle dam, Dry dam, Diversion dam

Classification of Dams

Why do you think dams are broaderat the bottom than at the top?


7/20

Multi-purpose river projects

Earlier water regulating structures impounded water forirrigation

Today, as the name suggests they are


8/20

Tehri

Power

Irrigation

DomesticWater Supply

Flood Control

1204 MW

1181MW

815.6 MW

1920 MW

Kutch ,Saurashtra

10 million acres in Punjab,Himachal Pradesh, Delhi,Haryana and Rajasthan

270 million gallons of drinking waterper day to the industrialized areas of

Delhi, Uttar Pradesh and Uttarakhand

controls flooding of thelower delta region by theMahanadi river


9/20

Tehri

Inland Navigation

Recreation

Fish Breedingdiverts water from theGanga into the Hooglyduring the dry season toflush out accumulated siltand allow navigationthrough the Hoogly intothe port of Kolkata

water-skiing, sailing,kayaking, speed boatingand water scooter racing

fifty one species and sub

species of fish. Also a waterfowl refuge


10/20

Temples of modern Indiaindustries

hydropower for

electricity

livelihood +

fishing

irrigation

water supply

Inland Navigation

Flood Control


11/20

Temples of modern India?

Evaporation,

Green House

Gas emission

Displacement of local tribes

Destruction of historicaland archaeological sites

Loss of natural biodiversity

Loss of Livelihood


12/20

Fragmentation of river ecosystems and

Impacts biodiversity

Barrier for movement of migratory fish like the

salmon, thereby affecting its population

Reduction in natural biodiversity along

riverbanks due to reduced

natural flooding

Alters water temperature downstream,

affecting plant and animal life in the

reservoir and the river



13/20

Reservoir Sedimentation

Sediments that naturally flow in a river are blocked

Reservoir storage capacity reduces

Power generation and water availability reduces

Downstream erosionLesser sediments reach downstream

Water flow eats into riverbed and shore (erosion)

affects biodiversity in and along the river and

increases coastal erosion


14/20


Cropping patterns changed to more

water intensive crops affects soil quality

Inter-state water disputes

Maharastra vs. Karnataka and AP

Karnataka vs. TN

Between farmers and urban areas

Sabarmati basin

Cauvery basin

Water disputes

Other social and ecological impacts:

But are water disputes caused by a mismatch in

demand and supply? Do dams actually ease

disputes by providing water during lean periods?

Debate this in class.


15/20

the disputes.

Lets play a game


16/20

Divide the class into 5 teams

Draw as many dashes as in the name of a dam / reservoir / barrage.

_ _ _ _ _ _ _ _ Team A starts. They guess a letter. The teacher puts in the letter at the

correct place, if it is there in the name of the dam. Else, the letter iswritten down on one side.

A maximum of 10 wrong guesses are allowed.

The team gets as many points as letters on the side (maximum of 10).

The team with the lowest number of points wins

Hangman


17/20Source: Maps of India

Point the correct position

of the dam/ reservoir /

barrage on the map and

get 2 points reduced from

your points tally


18/20

Activity 1

A bench of 5 Supreme Court Judges

A person who will lose his home and lands by construction of a dam

A passionate environmentalist

A farmer downstream, plagued by seasonal floods and drought

An industrialist

A politician from a nearby urban constituency

Assign the following roles to students


19/20

Activity 1

Select a river in your state

Let each party put forward their views on the construction of a

multi-purpose river project that will directly affect them

Let each party also put forth solutions for opposing factions

The judges can take a decision on the project depending

on the case put forth


20/20

Activity 2

Divide the class into 2 teams

Discuss the pros and cons of the dam built at Tehri or Koyna

(let the students research the facts before the classroom discussion)

En Ppt Evs Swp Dam It 0

Documents

Transcript of En Ppt Evs Swp Dam It 0