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Page Name: Rainwater harvesting


Posted by: project ideas
Created at: Wednesday 30th of May 2012 06:30:17 AM
Last Edited Or Replied at :Wednesday 30th of May 2012 06:30:17 AM
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ns occurring in the first rain immediately after a dry spell; the concentration of these and other contaminants are reduced significantly by diverting the initial flow of water to waste as described above. The water may need to be analysed properly, and used in a way appropriate to its safety. In the Gansu province for example, harvested rainwater is boiled in parabolic solar cookers before being used for drinking. In Brazil alum and chlorine is added to disinfect water before consumption. So-called appropriate technology methods, such as solar water disinfection, prov..................==> [ Click Here to Read More ]



Page Name: Rainwater harvesting from rooftop catchments


Posted by: project maker
Created at: Tuesday 21st of February 2012 04:55:48 AM
Last Edited Or Replied at :Tuesday 21st of February 2012 04:55:48 AM
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ent supply system, and also in areas where good quality fresh surface water or groundwater is lacking.
Annual rainfall ranging from less than 500 to more than 1 500 mm can be found in most Latin American countries and the Caribbean. Very frequently most of the rain falls during a few months of the year, with little or no precipitation during the remaining months. There are countries in which the annual and regional distribution of rainfall also differ significantly.


Technical Description
A rainwater harvesting system consists of three basic elements: a collection area, a conveyan..................==> [ Click Here to Read More ]



Page Name: Safe Water Technologies


Posted by: project report expert
Created at: Monday 27th of June 2011 04:44:18 AM
Last Edited Or Replied at :Monday 27th of June 2011 04:44:18 AM
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commonly, groundwater is reached through boreholes, drilled either by hand or machine. When drilling in arsenic-affected areas, precautions should be taken to make sure that safe aquifers do not become contaminated. If a borehole must penetrate a contaminated aquifer to reach safe water below, the borehole should be grouted after drilling is completed. In some areas, groundwater can have naturally occurring water quality problems aside from arsenic, such as high levels of iron, manganese, nitrate, chloride, or fluoride. Before promoting new sources of groundwater, the chemical quality should ..................==> [ Click Here to Read More ]



Page Name: RAIN WATER HARVESTING


Posted by: project report expert
Created at: Saturday 18th of June 2011 04:26:09 AM
Last Edited Or Replied at :Tuesday 19th of June 2012 04:24:11 AM
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s it will be contaminated with dust, bird droppings etc. Roof gutters should have sufficient incline to avoid standing water. They must be strong enough, and large enough to carry peak flows. Storage tanks should be covered to prevent mosquito breeding and to reduce evaporation losses, contamination and algal growth. Rainwater harvesting systems require regular maintenance and cleaning to keep the system hygienic.
Subsurface dyke
A subsurface dyke is built in an aquifer to obstruct the natural flow of groundwater, thereby raising the groundwater level and increasing the amount of water store..................==> [ Click Here to Read More ]



Page Name: RAINWATER HARVESTING ARTIFICIAL DISCHARGE TO GROUND WATER


Posted by: academic expert
Created at: Monday 18th of April 2011 01:51:20 AM
Last Edited Or Replied at :Thursday 26th of July 2012 11:58:59 PM
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ter. There are many reasons but following are some of the important ones.
• To arrest ground water decline and augment ground water table
• To conserve surface water runoff during monsoon
• To reduce soil erosion
• Surface water is inadequate to meet our demand and we have to depend on ground water.
• Due to rapid urbanization, infiltration of rain water into the sub-soil has decreased drastically and recharging of ground water has diminished.
• Over - exploitation of ground water resource has resulted in decline in water levels in most part of the country.
• To enhance..................==> [ Click Here to Read More ]



Page Name: RAINWATER HARVESTING full report and ppt


Posted by: seminar topics maker
Created at: Sunday 06th of February 2011 10:53:13 PM
Last Edited Or Replied at :Friday 14th of September 2012 06:41:50 AM
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trance of the storage tank to filter the first rain.
Rainwater harvesting efficiency: The efficiency of rainwater harvesting depends on the materials used, design and construction, maintenance and the total amount of rainfall. A commonly used efficiency figure, runoff coefficient, which is the percentage of precipitation that appears as runoff, is 0.8.
For comparison, if cement tiles are used as a roofing material, the year-round roof runoff coefficient is about 75%, whereas clay tiles collect usually less than 50% depending on the harvesting technology. Plastic and metal sheets are best..................==> [ Click Here to Read More ]



Page Name: Rain water harvesting in surrounding areas


Posted by: sharathsingh
Created at: Friday 17th of September 2010 04:46:22 PM
Last Edited Or Replied at :Saturday 18th of September 2010 12:12:46 AM
areas , surrounding, harvesting , water, Rain ,
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Dear sir,...

I am sharath and I am a student, I want more information about rain water harvesting, as I have decided to prepare academic projects report on this topic, so please help me?

Please do the above needful,..

Thank you,.....................==> [ Click Here to Read More ]



Page Name: RAINWATER HARVESTING AND ARTIFICIAL RECHARGE TO GROUND WATER full report


Posted by: best project report maker
Created at: Sunday 07th of February 2010 07:25:01 PM
Last Edited Or Replied at :Friday 23rd of November 2012 05:38:24 AM
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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 harvesting replenishes the ground water table and enable..................==> [ Click Here to Read More ]



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