Rainwater harvesting from rooftop catchments



The application of an appropriate rainwater harvesting technology can make possible the utilization of rainwater as a valuable and, in many cases, necessary water resource. Rainwater harvesting has been practiced for more than 4, 000 years, and, in most developing countries, is becoming essential owing to the temporal and spatial variability of rainfall. Rainwater harvesting is necessary in areas having significant rainf ....etc

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sir , i need some ppt on the topic Rainwater harvesting and water saving technique for sustainable crop production in unirrigated areas for my credit seminar. ....etc

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VIRGINIA RAINWATER HARVESTING MANUAL



The Trend
Today’s rainwater harvesting systems have evolved significantly and offer
technologically advanced components. However, harvesting rooftop rainwater is more
popular in European countries like Germany and England than the United States.
Adoption is equally low in Virginia, with most adopters being rural dwellers with failing
wells with no local municipal line and large corporations wishing to conserve wate ....etc

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Submitted By
DILEEP RAJ.K


ABSTRACT
Water is most abundant component on earth surface, constituting about 70% of the planet surface. Although some 70% of the Earth's surface is covered by water much of this is saline. However freshwater is available in almost all populated areas of the earth although it may be expensive to access the water and the supply may not always be sustainable. Only 4% of the available water is suitable for drinking purpose.
Throughout most of the world, the most common contamination ....etc

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Please send me the Rainwater harvesting ppt in tamil language for academic use;
S.Needhidasan
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RAINWATER HARVESTING AND ARTIFICIAL RECHARGE TO GROUND WATER


WHAT IS RWH?
RWH refers to collection and storage of rainwater and also other activity such as

harvesting surface water extracting ground water , prevention of loss through

evaporation and seepage


PURPOSES OF RWH
Stored for ready use in containers ground or below ground
Charged into the ground for withdrawal later


BENEFITS OF RWH
Rainwater harvesting prevents flooding of lowlying areas
Rain water harves ....etc

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HARVESTED RAINWATER IN SEMI-ARID


M. K. Khandelwal1,S. K.Shakya2, R. H. Ghaghada3, and G. R. Sharma4


Abstract:
A situation specific computer programme incorporating hydraulic design and
hydrological criteria, set of different runoff coefficient, CN=88 for runoff generation and
USDA,SCS,CN method is incorporated to design parameters for water harvesting structures
at title watershed. The computer programme is used with average of the daily rainfall time
(1971-97) t ....etc

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DRIP IRRIGATION AND CLOGGING IN DRIP IRRIGATION

INTRODUCTION
Drip irrigation is a method of applying water or frequent application of water to crops through small emitters in the vicinity of root zone, wetting a limited amount of surface area and depth of soil.

DRIP IRRIGATION SYSTEM
In drip system water is conveyed through a system of flexible pipe lines
Drip system reduces water requirement of the plant by maintaining minimum soil moisture, equal to field capacity.

SYSTEM COMPONENTS
A ....etc

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Presented By:
B.ANUSHA PRIYA,II.B.Tech(CE)
M.BHAVYA, II.B.Tech(CE)
KSRM COLLEGE OF ENGINEERING
KADAPA


RAINWATER HARVESTING
Abstract:
The paper outlines rainwater harvesting is being frequently used these days, however, the concept of water harvesting is not new for India. Water harvesting techniques had been evolved and developed centuries ago.
Living creatures of the universe are made of five basic elements ....etc

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