Which of the following is not a source of pollution that affects the quality of

Question

Which of the following is not a source of pollution that affects the quality of Susquehanna River water in our region? a) abandoned coal mines, b) agricultural fertilizer, c) combined sewer and storm water system, d) erosion of farmland, e) sinkholes in carbonate rock. The water table marks: a) the upper limit at which all pore spaces are filled with water, b) the lower limit at which all pore spaces are filled with water c) the zone in which the pore spaces are filled with air; d) the zone in which permeability is a minimum, e) flood stage in a river.

Explanation / Answer

4. Sinkholes in carbonate rocks is not a factor that affects the quality of Susquehanna river. Sinkholes are generated due to underground water or erosion and it takes a long time to make it visible. They have hazardous effects on life and property when formed in urban areas. Answer is "e"

5. The water table marks the upper limit of the saturation zone where all the pores between soil particles and rock mineral particles are filled with water. So correct option is "a"

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