Awareness and Procedure for Rwh

8/9/2019 Awareness and Procedure for Rwh

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AWARE

PROCERAIN WATE

(R

SHRI U.M.

RAIN WATER MANG

TRUSTEE JALVAR

ESS AND

URE FORHARVESTING

H)

ARANJPE

MENT CONSULTANT

HINI PRATISTHAN


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Introduction

Rain Water Harve RWH means storing Rain

artificial / manmade reser

OR

In natural reservoirs suchit as and when we need it

In short RWH is storing Rabove ground or bellow gsource of water

stingater in

oir ( tank )

as Pond, aquifer and usingas a source of water

in water either in tankound and using it as a


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Following are the object1) To use it as a source

(i) Drinking purpose

(ii) Non potable purp

gardening , car washi(iii) To store it and us

agriculture purpose.

2) To recharge open welreplenish the water us

ves of R.W.Hof water

se such as flushing,

g ect.e it for Horticulture and

l & bore well so as tod during entire year


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3) To store it in pond, lake f/ aquifer or for to use it af

4) To control salt water intru

well along coastal area.

5) To recharge subsoil / aquilevel flooding is reduced ocities.

6) To improve quality of wat

r either recharge of subsoiler monsoon

ion in pond,lake,well,bore

er in cities so that localr arrested particularly in

r.


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Potential Of Rain Wat Assuming annual average Rain

Each 1000 sqm of land will yiel

or 10,00,000 liters of water.( o

1000 cu.m is sufficient for 20 p

1000 cum is sufficient of aboutflushing purpose at 40 lpcd

Assuming Cost of water supplieloosing at Rs 20 per sqm of lanevery year.

e

rfall as a 1000mm (1m)

1000 cum

e million liter )

rsons for entire year at 135 lpcd

70 person for entire year for

d as 20 per cum We will beor 20000per 1000 sqm of land


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Importance of Rain Wa In a city normally tap and or b

water.

Very few people are considerin

Since Rain water has huge potewater as a 1st source of water a

er Harvestingre well water is a source of

Rain water as a source of water

ntial we should consider Rainnd then go for other sources.


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Quantification of

Rain Water Harvestin

(i) Roof top (Terrace )of Building / (ii) Open portion of plot

Roof top area can be calculated fro

of Roof top Rain water is possible

If we know Rate of Infiltration then

Ifintake capacity of bore wellis kn

quantity of water used for recharge

R.W.U.I. = Rain water Useddurin

Total Rain fallduring y

Buildings and

bldgdrawing Hence quantification

recharge quantity can be calculated

w to us then we can calculate

of bore well

year

ar


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Procedure for Roof top

collection Calculate the Available roof top

Annual average Rainfall & No o

Daily requirement of water forGardening, Car washing etc.

Position of Rain Water down ta

(Terrace ) Rainwater

or terrace area

Rainy days

on potable use such as flushing ,

e pipes.


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Use of Rainwater

for NonP

otableP

urp

(1) Jamanabai Narsi school at Juh

Roof Top area = 8,00 sqm

Daily requirement = 40,000 liter

Rain water Storage tank capacit

This storage capacity is sufficien

sufficient for 2 day flushing w

Total Rainwater available for use

= 1,120 cum

se

Mumbai

provided = 1,00,000

to collect 120mm of rain fall & is

ter requirement.

8,00 X 2 X0.70


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(2) 10th Kheth wadi MumbaiRoof Top 110 sqmTotal Flats 54 Daily flushing

Rain water Storage tank capaThis storage capacity is sufficisufficient for one day.

Total Rain water available 110 X 2

CIPLA LTD. Vikoril (West ) MumbaiRoof top 1170 sq mtFlushing water requirementRain water Storage tank cap

This storage capacity sufficient tosufficient of 2 days, Total Ra

1,170 X 2 X 0.70 = 1,638 cu.m

ater Requirement 10,800 liter

city10

,000

litersent to collect 90 mm Rainfall & is

X 0.70 = 154 cu.m

5,000 literscity 2,00,000 literstore 170mm Rainfall & isin Water available


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Capacity o

Rain WaterHence capacity of Rainwater

either 5 times flushing dailrequirement

O

capacity should be sufficientover Roof top.

( Minimum tank capacity shto accommodate one tank

Roof Top

torage Tanktorage tank should be(non potable) water

o collect 100 mm Rainfall

uld be 10,000 liters so asr of water )


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FILTERS

By using 100 micron Geo te

Uni tech filter having v wir

Rainy Filters( F.R.H. system

Jonsan V wire filter

tile

technology

Banglore )


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On LineF

ilters


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Recharge of Subso For Rain fall over open portion

available for R W H (i) Recharge of subsoil (ii) Recharge ofAquifer (iii) Recharge of bore well For recharge of subsoil we will

Trial Pit Methods

Double Ring Infiltro meter

For recharge ofAquifer we willpermeability test

For recharge of bore well we wi

il Groundwaterf plot following options are

ave to carry out infiltration test

ave to carry out packer

ll have to carry out pumping test


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Recharge of Subsoil

Infiltration TestTRIAL PIT METHOD The percolation rate is observe

constructing a trial pit of size 1 The pit is filled with locally avai

necessary to stimulate the sam

occur during rainy seasons. Hence percolation rate is obser

a long monsoon rains say two t After 2 or 3 days of rains the s

saturated, and the percolationrealistic, than one observed du

This observed rate is a reasonaof pits required to percolate , awater is collected.

at site by developing /.2m x 1.2m x 1.5m.

lable graded material. Here It isphysical condition which may

ed during a small dry spell afterthree days or more.

b soil will be sufficientlyate observed will be moreing pre monsoon period,le basis to calculate the numberter knowing the area from which


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Recharge of Subsoil

Infiltration TestDouble Ring Infiltro meter It is a another simple method f

soil.( flow rate of water into grconcentric ring with outer ringring having dia of15 cm . (or o

Height of each Ring is 30 cm Tto soil ( say 10 cm inside the son their own

First outer ring is filled up withup with water The water level imanually or with instruments tiobserved. This steady rate will ithat soil.

r finding out permeability ofund ) Instrument consist of 2having dia of30 can and inneruter 60 cm & Inner 30 cm )e two rings are driven partially inil ) so that rings stands vertically

water and then Inner ring is filledn both ring is maintained eitherll steady downward rate is

ndicate the Infiltration rate of


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Options to recharge Percolation pit

Percolation pit with bo

Percolation pit along Percolation pit with bo

subsoil

re

WD

re along with SWD


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DEATILS OF

1) PERCOLATION PIT 2) PERC

3) SWD WITH PIT 4) SWD

LATION PIT WITH BORE

ITH BORE


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Recharge of Bore well

( Pumping Test ) Water is pumped out from bore

pumping rate.

While pumping water level is re

minute till we stop pumping

After we stop pumping water leminute till it attains original lev

From above data we can calcul

well for 2 to 3 hours with known

corded from start every 15

vel is again recorded every 15l

te in take capacity of bore well.


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photo


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Quality of water use

( Artificial re Roof top ( Terrace ) water

recharge after proper careflush & filter arrangement.

Run off water contains orpesticide residue and disssource of contamination.

Hence quality of water shof Drinking water.

d for well recharge

harge )to be used for directsuch as system having first

anic matter, fecal matter,lved fertilizer are potential

uld be comparable to that


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Natural In case of natural recharg

surface runoff it passes thcover, before it reaches thwater recharge takes advability for biodegradationproviding in situ treatmencover acts as a purifier.

echargeof aquifer by Rainfall &

rough certain depth of soile aquifer. Here groundntage of subsoils naturalnd filtration, there byof surface runoff. This soil


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Hence following methods

i) A farm pond ( 10m X 6

from open well or bore well

ii) Circular trench aroundof 2m away & filled up wi

re used

X 3m ) at a distance of 2m

ore well or well at distanceh graded material.


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Utilization of Surfac For Rain Water Harvesting of s

area more the 10000 sq.m., pr

m average depth. Then pond

3= 1500 cu.m.

Helps in reducing flooding of ad

At S.H. Kelkar & Co. At their fa

We have developed pond havin

depth, to collect part surface ru

( 88000 sq m ). The capacity o

e Runoffrface Runoff in layout having

vide pond having 5% area and 3

ill have capacity to store 500x

joining road

tory at panvel:

50 m dia and 3 m average

noff from 22 Area of land

Tank. is 5891.25 cu.m.


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POND AT PANV L


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Operation and Main

Specialinstructions to be give

occupants to keep the terrace

be allowed by society to its me

Filter to be used as per instruc

Necessary precautions to be ta

Simple periodic chlorination or

for disinfectionis to carried ou

Filter media and nylon net sh

obtain proper result.

Water shouldnot be allowed t

percolation pit.

Drain the R.W.H tank complete

thoroughly before every mo

tenance Guidelines

to the members of society /

f Bldg clean( Terrace shouldnot

mber to any family function)

ions of manufacturer

ken to avoid mosquito breeding.

use oflime in the flushing tank

.

uld be cleaned periodically to

stagnate in the collection or

ly and clean from inside

nsoon.


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I Think with this we casubstantial RWH

TH

n defiantly achieve

NKS

Awareness and Procedure for Rwh

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