Water Management Techniques:Rainwater Harvesting and Drip Irrigation Technique Video Lecture | Class 7 Oxford Science: Chapter Notes, Worksheets & Tests

hello friends this video on water
appreciates resource part 10 is brought
to you by example calm no more fear from
exam so looking at all these things like
depletion of water table scarcity of
water it is very important for all of us
to understand that it is high time that
we should start saving water we need to
take care of water because the sources
of water is limited but if we keep on
utilizing that a limited source of water
in like this way in that case a day will
come when there will be no water left on
the hood so it is very important to
start saving water now since I was
talking about the water management
techniques that is how can we manage
water to the better range so I'll give
you some examples which show that yes
there are situations where water can be
managed in a better way so one such
example is the drip irrigation technique
so just now I told you that the
traditional method of the you know
irrigation that involves a lot of
wastage of water because in traditional
method the farmer carries water from a
well in a big pot and then wife-carrying
that water a lot of water will fall down
in fact the amount of water which is
needed by the plant will end up pouring
a lot more water than that so that means
we will waste a lot of water but with
this drip irrigation technique you see
the water that reaches the plants is
what is only that much which is needed
by the plant so just look at this so let
us say this is your a because you don't
feed and then you have pipelines like
this and water flows through these pipes
okay so you see here a boarding is done
where water is fetched from below the
ground so water will be fetched about it
is there which helps in their pumping
the water from below the ground so the
ground water will be received here and
then
groundwater will be supplied to the
field through these pipelines so you see
you have a mainline and from these make
this main line you have sub main lines
like this so from one way like the red
line is the main line from there you can
have some lines which are which will be
blue color many sets of lines will be
there and from these sub lines you have
a lot of you know droppers you see these
these structures they are called
droppers so you see a lot of droppers
and one dropper is present below each
plant
so from this droplet drizzle of water or
you know like water will fall drop is
near the roots of the plants so when you
provide water drop-bys you are not
providing any extra water at the same
time it is not that the plants will dry
up because it is continuously getting
some amount of water so if small small
amounts you are continuously providing
water to the plants so that is there is
no wastage in transporting water from
one place to another so this is a very
judicial way of irrigating the field so
this technique is called drip irrigation
technique so if this week we are doing
irrigation at the same time we are
saving water so these kind of techniques
account as water management techniques
so we should you know variability and we
should try to find out solutions how we
can utilize water in the best possible
way another example of water management
technique is the rainwater harvesting as
I said that rainwater is a very
important source of water so how can we
utilize the rainwater at its best
because we see that a lot of rainwater
gets just wasted so as I said due to
construction of buildings roads
pavements it is not always possible for
most of the rainwater to refill the
groundwater because they are not even
able to reach below the ground so a lot
of drain water you know just the keep
flowing here and ending it based it so
what we can do is we can accumulate the
rainwater for reuse now a lot of
buildings these days in fact most of the
apartments and societies have been
they have green water harvesting system
within their campus
so with this rainwater harvesting system
what they do is they collect all the
rainwater and they all the green water
is stored in a reservoir and then this
water is filtered so that it can be
clean and then that clean water is
utilized by the various buildings so you
look at this so that when rainfall
happens so this is a cemented area right
so from here obviously it will not go
below the soil so it will not add to the
groundwater so from here you have
pipeline through which you collect all
the rainwater in this rainwater storage
and then this rainwater storage is the
rain water it is filtered through a sand
filter and then it is put into the main
tank so every building will have a main
tank and from this main tank you have a
pump which will help to you know pump up
the water from the tank to the tank
which is present inside your house but
so from this tank you get it in the
ground flow would first go second
forward variable so basically you are
storing the rain water and the same
water is being reused so that is also
this is also a very nice water
management technique and it is nice to
know that these days we have these
negative water it in water harvesters in
a lot of places in a lot of buildings
specially in the cities they have this
name water harvester because this is
very very urgent and important now let
us quickly look at some of the tips to
save water what can we do from our end
to save water the some of the small
things which we can do I do not leave
taps open may not in use now if you have
opened the tab for maybe washing your
utensils wash your hands wash your face
so just do it and then immediately close
the tap so that you do not end up
wasting extra water useful loads in
washing machine so when you put your
fluids in the washing machine so many a
times it happens that people could just
do two three clothes and then they you
know switch on the washing machine now
whether you are putting small number of
clothes or you are putting it in full
loads
the amount of water which gets used by
washing
remains almost the same so it is better
to use the washing machine full notes so
that you are judiciously being able to
use water check for decays in pipes at
your home and locality that this is
again very important a lot of times what
happens that maybe our tap is leaking
maybe there is a pipe in the kitchen
which is leaking and since drop by drop
water is leaking from that pipe we feel
that okay that's okay it's just a drop
of water coming out of it but we don't
realize that when a single drop of water
is leaking all the time so it actually
adds up to a huge amount of water so if
with each drop we are actually you know
wasting more and more water so in
leakage should be checked at the
earliest and this is a very common
problem in a lot of household as well as
a lot of locality in many localities to
be seen that the main water pipe lengths
they have reached in a lot of places in
fact in big cities like Bangalore itself
I have seen so many times that tankers
which carry water from one place to
another so they there is a huge leakage
in the tanker and as they move on the
roads so water keeps leaking from those
tankers so all these things are like
because of our negligence so we should
put a check on any kind of leakage in
any pipes in our own as well as locality
use a watering can in your garden now in
order to water the plants in your garden
there are various ways you can either
use the hose pipe which has a you know
right around and then you can put water
on the plants but in that case a lot of
water will be given to each of the pads
maybe it mount of water which is needed
by the plants more than that will be
given by your pipe so it is always
advisable to use a watering can because
the watering can will have holes on it
and therefore it will give water
drizzles it will give
drop why is water so it will not lead to
the stage of water so only that much of
water will be given to the plants as is
needed
so usage of a watering can can also save
a lot of water use water efficient
shower heads toilets tabs etc so these
deals with advancement in technology a
lot of shower heads are common which
utilizes water they have it at its best
so they do not just pour so much of
water at a time so small amount of water
is being poured once at a time so that
means it is more water efficient so we
should maybe putting or buying these
into water efficient the tabs or shower
heads might sound costly at the initial
time but you know over the long run it
is more effective and it is more likely
shape as well so these are some of the
things which we can do from our end
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