porosity types of pollution surface water pollutions groundwater pollution application of land use land cover impacts of land use land cover significance of land use & land cover the difference between land use & land cover  spreading methods • basin method • channel metho artificial recharge of groundwater concept of rech purposes and principles of artificial recharge concept of recharge need for artificial recharge p surface investigations of groundwater digging pits and shafts construction of percolatio importance of groundwater studies in civil enginee advantages of groundwater hydrological cycle sourc classification of dams types of dam purposes of dam formation of igneous rock forms of igneous rock structure of igneous rock classification of igneous rock classification of fold fold and tunnel formation of fold artificial recharge of groundwater classification of rocks based on porosity & permea permeability vertical distribution of groundwater hydrological cycle advantages of groundwater formation of sedimentary rock types of sedimentary civil engg. and fault reorganization of fault in the field fault and elements of fault plate tectonic force
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