⛪Home⇐ Class VII Tanks and Ground Water


Mind Maps
 
VII_TS_SOC_tsTanks_Ground_Water/
 
 


Class VII - Social: Tanks and Ground Water
One Word Answer Questions:
Q) Rocks which have cracks or pores in them and can contain water are called?
A)    Show/hide Answer

Q) Groundwater usually accumulates above such rocks. Since the water cannot go beneath them, these are called?
A)    Show/hide Answer

Q) Some of them dig deeper tube wells, which cause further decline in the?
A)    Show/hide Answer

Q) Many times, water is polluted due to the excessive use of?
A)    Show/hide Answer

Q) Over the last few years, great efforts have been made to?
A)    Show/hide Answer

Q) The layer of water which accumulates under the ground among rocks is called?
A)    Show/hide Answer

Q) A person is appointed to regulate the use of the water from the tank. This particular person is called?
A)    Show/hide Answer

Q) Which water the In our part of the country, it rains only for about three to four months. For the rest of the year we are dependent upon?
A)    Show/hide Answer

Short Answer Questions:
Q) How were the tanks built?
A)   Show/hide Answer

Q) How did the Tanks Help?
A)   Show/hide Answer

Q) Explain briefly about Fishing?
A)   Show/hide Answer

Q) What are the uses of Groundwater?
A)   Show/hide Answer

Q) What is the Quality of Groundwater?
A)   Show/hide Answer

Q) Write a short note on Water Table or Groundwater Level?
A)   Show/hide Answer

Q) Write a short note on Decline of Tanks in Our Times?
A)   Show/hide Answer

Q) Write a short note on Net Types?
A)   Show/hide Answer

Q) Write a short note on Fishing?
A)   Show/hide Answer

Q) Write a short note on Cooperative Society of Fishermen?
A)   Show/hide Answer

Long Answer Questions:
Q) Explain in detail about Water Tanks?
A)   Show/hide Answer

Q) Explain in detail about decline of Tanks in Our Times?
A)   Show/hide Answer

Q) Explain in detail about Fishing in Tanks?
A)   Show/hide Answer

Q) Explain in detail about Ground water?
A)   Show/hide Answer

Q) Explain in detail about cooperative Society of Fishermen?
A)   Show/hide Answer

Q) Explain in detail about Rocks and Groundwater in Telangana?
A)   Show/hide Answer

Q) Explain the Use of Groundwater?
A)   Show/hide Answer

Q) Explain the Quality of Groundwater?
A)   Show/hide Answer

Q) Explain the Recharging Groundwater?
A)   Show/hide Answer

Q) Explain the Bhethavolu village?
A)   Show/hide Answer

Q) Explain the Fishes in the tanks?
A)   Show/hide Answer



Tanks and Ground Water
Tanks (Cheruvulu)

How were the tanks built?

The tanks were usually built by building a strong wall of stones and mud across a small stream in such a way that with a wall on just one side, a large lake could be formed.


Water tank

A person is appointed to regulate the use of the water from the tank. This particular person is called 'Neerati' or 'Neeru Katte manisi'.


How did the Tanks Help?

The most important thing is that tanks helped to prevent run-off of rain-water and the erosion of top soils. Every year, people would collect tank silt and use it in their fields to fertilise the soil.


Use of Water tank

The most important thing is that tanks helped to prevent run-off of rain-water and the erosion of top soils. Every year, people would collect tank silt and use it in their fields to fertilise the soil.


Decline of Tanks in Our Times

Instead of caring for the tanks, people have been digging deeper and deeper tube wells at a great expense. As a result, in almost every part of the state, we see the sad state of dry tanks lying uncared for. Repairs to the tanks, desilting etc. have not been done regularly. People also have gradually taken over the tank land for building houses or for agriculture.



Decline of Water tank in our times
Fishing in Tanks

Many of the fisherfolk are from traditional fishing communities like Besta (Gangaputra), Goondla and Mudiraj (Tenugu) Community depend upon these tanks and rivers for leading their lives.



Fishing in Water tank
Bhethavolu village

There are about 600 families of Besta (Gangaputra) and Mudiraj Community in Bethavolu village. Out of which 60-70 households are leading their lives by fishing. However, they fish in the tank only during the months of March and April. During the rest of the year they work as small farmers or labourers.



Bhethavolu Village
Fishes in the tanks

The young fish are bred artificially in fish farming centres and are let out as seedlings into the tank. When they grow big they are fished and sold. The important among these are Merige, Ravvu, Bochche (Katla) and Bangaru Theega.



Fishing in the tank
Net Types

Fisherfolk use two methods to catch fish - one in shallow waters and one in deep waters. Visire vala is used when there is less water in the tank. Kachchu vala weighs less. Fisher men go farther in to the stable water and spread the Kachchu vala. These are used mostly in the occasions where the water is deep.



Fishing net
Fishing:

Fishing is done twice a day. They catch the fish from 4 0' clock to 8 0' clock in the morning and take them to market. Again they catch fish from 1 to 4 0' clock in the afternoon and take them to market. When the catch is small they take them to Kodad or Suryapet for selling and when it is large they take it to cities like Hyderabad.



Fishing
Cooperative Society of Fishermen

The Society pays Rs.2,35,000 to the Department of Fisheries for fishing in the tank. The Society has to purchase fish seedlings and put them into the tanks. They are supposed to pool the produce and share the earnings equally among all members.



Cooperative Society of Fishermen
Ground water
  • Rocks which have cracks or pores (minute holes) in them and can contain water are called pervious rocks. Some rocks like granite, Kadapa limestone etc. are very compact and do not have pores in them.
  • Water cannot enter into them. Groundwater usually accumulates above such rocks. Since the water cannot go beneath them, these are called impervious rocks.

Groundwater
  • The layer of water which accumulates under the ground among rocks is called aquifer.
  • The thickness of the aquifer determines the availability of groundwater in the area.
Water Table or Groundwater Level
  • Water level is never stable.
  • It goes deeper in summer months and comes up after the monsoons.
  • If you were to dig a new well in the same region you would strike water at the same depth.
  • This is the level of groundwater, which is also called the water table.

Water table
Rocks and Groundwater in Telangana
  • The top portion of the rocks (about 20 meters) are broken (weathered) and they carry water.
  • Many of these rocks also have deep cracks going down to 50-100 meters depth.
  • These cracks too contain water.

Rocks and Groundwater in Telangana
Recharging Groundwater

If the flow of the rain water is checked by vegetation or bunds, then there is a greater possibility of it percolating into the soil to join the groundwater. Grasses are planted on the hill slopes from where a stream starts and small check dams are also built across streams to store water for a longer time. All this helps to increase or recharge the groundwater.


Recharging Groundwater

Over the last few years, great efforts have been made to 'harvest' rainwater by these means. These measures are usually taken for a stream or a river. Such efforts are called 'watershed development projects'.


Quality of Groundwater
  • Many times, water is polluted due to the excessive use of fertilisers, pesticides or poor drainage.
  • In our country this problem is increasing day by day.
  • Unless we take the preventive steps, most of the wells or river water soon will become unsafe for drinking or even for bathing.

  • Quality of Groundwater
    Use of Groundwater

    Those who own land over aquifers tend to over use the water, which decreases water table for all the neighbouring people. Some of them dig deeper tube wells, which cause further decline in the water level


    Saving Groundwater
- Facebook | - Twitter | - Google+ | - YouTube | - Mail
Meritpath...Way to Success!

Meritpath provides well organized smart e-learning study material with balanced passive and participatory teaching methodology. Meritpath is on-line e-learning education portal with dynamic interactive hands on sessions and worksheets.