Continuous contour trenches were dug on the hill slopes to arrest the erosin of
soil, harvest water..
A number of water harvesting structures like check dams, percolation tanks what is the meaning of the above sentence
Answers
Explanation:
Methods and techniques for ground water recharge
Ground water recharge in Rural areas
Gully plug
Contour bund
Gabion structure
Percolation tank
Check dams / cement plugs / nala bunds
Recharge shaft
Dugwell recharge
Ground water dams or sub-surface dykes
Ground water recharge in urban areas
Recharge pit
Recharge trench
Tube wells
Trench with recharge well
Fresh water is scarce
Of the total water on earth, only 3% constitutes freshwater. Rest is saline water in the oceans.
11% of the total freshwater on earth is groundwater available upto a depth of 800m which can be extracted for use.
Mindless extraction and over exploitation of very small quantity of this precious nature resource has caused a rapid depletion and deterioration in its quantity and quality both.
Distribution of fresh water on earth
Distribution of fresh water on earth
Methods and techniques for ground water recharge
Urban Areas
Rural Areas
Roof Top Rain Water / run off harvesting through
Recharge Pit
Recharge Trench
Tubewell
Recharge Well
Rain Water Harvesting through
Gully Plug
Contour Bund
Gabion Structure
Percolation tank
Check Dam/ Cement Plug/ Nala Bund
Recharge shaft
Dugwell Recharge
Ground Water Dams/Subsurface Dyke
Ground water recharge in Rural areas
In rural areas, rain water harvesting is taken up considering watershed as a unit. Surface spreading techniques are common since space for such systems is available in plenty and quantity of recharged water is also large. Following techniques may be adopted to save water going waste through slopes, rivers, rivulets and nalas.
Answer:
hiiiiiiiiiiiiiiiiiiiiii