Ahad, 2 Disember 2012

11 di subis sarawak - Google Blog Search

11 di subis sarawak - Google Blog Search


Technique for designing rain water harvesting structure in <b>...</b>

Posted: 02 Dec 2012 09:26 AM PST

First we should understand the difference in ground water and fossil water.  Ground water is the upper surface water stored in unconditioned aquifer or said as the sand and gravel  water table. These sources can be recharged due to rains. But in the other hand the fossil or bedrock  water table is conditioned and cannot recharge in short time or due to rains. It will take hundreds and  thousands of years to maintain its stock and recharge.       The world is getting overloaded by population and day by day fresh water is needed in bulk quantity.  Nature speed for recharging the aquifers is slowed down due to many reasons e.g. demolishing forests,  soil cutting, silting in river beds, expansion of concrete cities and pumping of fresh fossil water in harsh   manner from the deep tube wells.       The main objective for harvest rain water is to maintain the recharging aquifers faster than the nature's   speed. Drillers should not allow to drill plain tube wells because plain casing TUBEWELL never charge   the unconditioned aquifer by sand water. Intake wells are to be dug in a hundred tube wells so that rest   of the tube wells may recharge by rainwater seepage.       Now a days rain water harvesting is being so important for recharging the conditioned (fossil) water  table. The easy and cheapest technique to harvest is as mentioned below.       For commercial and agricultural use an artificial inclined plane should be made of 4 degree to 7  degree, inclination should drop towards the tube well. Behind that tube well a thick stop wall having a  ball  valve at the lowest plane, should be constructed to stop the flow of rain water and develops an  artificial storage near the TUBEWELL.       Now, a tank of 4'x 4' x 4' (or bigger size suitable for the user) can be made around the tube well. The   upper 5' of the well casing should be filtered and wrapped with micron or resin filter. At the end of the   tank an ball valve (exit) should be fitted to pass out the first few days' water through it. This process   should be done only for cleaning the inclined ground. After cleaning the ground the gate valve should be   closed for allowing the rain water to the tube well.       Now the whole concrete tank should be filled with uniform sized gravel up to the top level. The rain   water stocks towards the bore hole are filtered through the gravel and pass through the micron filter and   poured automatically inside the tube well.       This process should also be applied for domestic use by using a filter unit. Line diagrams are shown   in the figures. For RAIN WATER HARVESTING we use the best kinds and combinations of water   filtrations Medias and plants. Rain water harvesting should be applied in intake wells, river dams, lakes,   ponds and check dams too by filtering the rain water by using best available filtration techniques.       According to electrical physics earth is the biggest stock of electrons and due to high atmospheric   pressure and high temperature the filtration process automatically goes on and on naturally.   Contaminated and impure water never remain same for long time in bedrock aquifers. These aquifers   are having the nature's technology to clean the water stock automatically.        Recharging water artificially is the only way to retain the water table in the user's area because there is   no other technological alternative for water. The wise and perfect solution to overcome water scarcity  and  be self sufficient in water needs is to save/conserve the precious drops falling from the sky.       Among the 70% of global water only 2% is pure and living water. Water is not costly but it is precious.   Save it…

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