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Ees 401:Hydrogeology Question Paper

Ees 401:Hydrogeology 

Course:Hydrogeology

Institution: University Of Eldoret question papers

Exam Year:2014



Answer all questions
1.a)Define the following terms (2marks)
i)Permeability (2marks)
ii)Transmissivity (2marks)
b)State the factors that determine the permeability of geologic formations (2marks)
c)State Darcy''s law (2marks)
d)A well with a radius of 0.5m penetrates completely a confined aquifer of thickness 40m and permeability 30m/day.The well is pumped so that the water level in the well remains at 7.5m below the original piezometric surface.Assuming that the radius of influence is 500m,compute the steady state discharge from the well.(7marks)
2.a)With the aid of diagram distinguish between confined and unconfined aquifers (6marks)
b)Define the term porosity (2marks)
c)State the factors that determine porosity of geologic formations (2marks)
d)An unconfined aquifer has an area of 400km2,thickness of 30m and a porosity of 40%.Calculate the volume of water retained in the aquifer if it yields 2000 million of free-draining water. (5marks)




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