Hydrogeology — DU B.Sc. (Hons.) Geology Previous Year Question Papers

. (c) If groundwater samples plot predominantly within the calcium-bicarbonate (Ca-HC03) field of a Piper diagram, what does this suggest regarding the underlying hydrogeochemical processes? 4 7. (a) Provide an overview of the steps and techniques involved in groundwater exploration. 12 8. What is the Ghyben-Herzberg relation between fresh and saline water ? I,ist the assumption implied in the relation. What are some of the causes of saline water intrusion into coastal aquifers ? Suggest some remedies to control saline water intrusion. 18 Time .. 3 IIours Ma}ct;mat:rn REaides 3 9® 1. Write short notes on th.e foHowing : 6%3=18 (a) Static water level, drawdown and e.®rie ®f depression fry) Saline water upeoning (c) Piezometric Stirfaee {d) Anisotropy and heterogeneity in aquifers (e) Sodium Adsorption Ratio (SAR) (f) Equilibrium and non-equilibrium groundwater flow condition (c) Porosity and permeability (d) Influent and effluent conditions in the context of surface water-groundwater interaction 2. Describe the.key components and processes of the hydrological cycle. Discuss the impacts of anthropogenic activities and clima.te change on the cycle, with particular emphasis on the groundwater component. Support your explanation with clear, schematic diagrams. 5. (a) Discuss about groundwater flow rate in context of Darcy's Law. What are the field parameters required for this computation ? fo} Explain the procedure for determining the direction of groundwater flow in an aquifer. (c) 3. (a) Describe the vertical zonation of subsurface water. Discu;s how these zones influence •the distribution and availability of Given a groundwater contour map where water table eleva.tions decrease from north to south, discuss the likely contaminant transport pathways. 4 6. (a) Briefly explain the key physical and chemical ® Discuss about the governing equation for parameters in assessing groundwater water flow to a well in a confined aquifer quality. 7 under equilibrium condition. 9 ro) Describe Hill-Piper diagram used in the • classification of groundwater types. IIi8hlight 4. Differentiate between (any three) 6x3=18 the advantages of this graphical method in (a). Storage Coefficient and Specific Storage hydrogeochemical analysis and the th) Intrinsic permeability and Hydraulic interpretation of groundwater chemistry Conductivity data. 7