1. True or false
a. Growing urbanisation leads to recharge of the water table.
b. Deforestation reduces water table
2. Suggest two methods that can help in saving water
3. Why is rainwater harvesting important.?
4. Why grass lawn is better than a cemented floor.?
5. What do you understand by sewage, sludge?
6. What are contaminants?
7. What do you understand by sewers, sewerage?
8. Name alternate arrangements of sewage disposal.
9. Arrange in correct order-
Grit channel ,sludge drying bed ,chlorination ,bar screen sedimentation tank ,aeration tank.
10. Name five things that should not be thrown down the drains.
11. Name two waterborne diseases.
Answers
Answer:
Groundwater recharge or deep drainage or deep percolation is a hydrologic process, where water moves downward from surface water to groundwater. Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and, is often expressed as a flux to the water table surface. Groundwater recharge also encompasses water moving away from the water table farther into the saturated zone.[1] Recharge occurs both naturally (through the water cycle) and through anthropogenic processes (i.e., "artificial groundwater recharge"), where rainwater and or reclaimed water is routed to the subsurface.
Answer:
3. Rainwater harvesting helps utilities reduce peak demands during summer months, saving treated water for more important and appropriate water uses. While rainwater can be a perfect primary water source for many uses and situations, it is also a great backup water supply for emergency situations.
4. grass lawn is better than cemented floor because when there is a rain if it is a grass lawn then infiltration of water takes place. if it is a cemented floor the water will flow away. ... if there are trees it will prevent water hitting the ground directly .
5. Sewage sludge is defined as any solid, semisolid, or liquid residue generated during the municipal wastewater and sewage treatment process.
6.a polluting or poisonous substance that makes something impure.
7. Sewerage is the infrastructure that conveys sewage or surface runoff (stormwater, meltwater, rainwater) using sewers. ... Sewerage ends at the entry to a sewage treatment plant or at the point of discharge into the environment. It is the system of pipes, chambers, manholes, etc. that conveys the sewage or storm water.
8.Septic tanks and chemical toilets can be set up as an alternative arrangement for sewage disposal.
2. Check your toilet for leaks. ...
Stop using your toilet as an ashtray or wastebasket. ...
Hope it may help u...
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