Exam Details
| Subject | hydrogeology | |
| Paper | ||
| Exam / Course | combined geo-scientist and geologist | |
| Department | ||
| Organization | union public service commission | |
| Position | hydro geologists | |
| Exam Date | 2017 | |
| City, State | central government, |
Question Paper
Ql. Write notes on the following in not more than 5 sentences each
Specific Yield and Specific Retention
Major Hydrogeomorphic Features of Arid Regions
Spectral Resolution in Remote Sensing
Principle of Resistivity Survey
Stable Isotopes in Hydrology
Ghyben-Herzberg Relationship
RooftopRainwater Harvesting
Application of Darcy'sLaw
Q2. Diagrammatically describe the occurrence of groundwater in the zone of aeration and the zone of saturation demarcating the water table. Add a note on hydrographs.
Schematically describe the hydrological cycle. Discuss about the water balance equation.
Write notes on the following:
porosity and permeability
Meteoric water and Magmatic water
Hydrostratigraphic Unit
Q3. Define transmissivity and storage coefficient. Discuss how they are determined.
Differentiate between drainage basin and groundwater basin. Give an account of the major hydrogeological features of hard rock terrain in
India.
Describe the occurrence of groundwater in the Indo-Gangetic alluvial province.
Q4. Distinguish between ground surface contour and water table contour. Explain how the water table contour map is prepared and state its uses.
Water levels of three wells are given below. Find out the flow direction.
W1 15.60m
O
O
W3 15.20m
O
W2 14.80m
Explain the laboratory method of determining the permeability of fine grained soil.
During a falling head permeability test on a soil sample of 10 cm diameter and 20 cm length, the head in the stand pipe of 2 cm diameter dropped from 50 cm to 25 cm in 2 minutes. Determine the permeability of the sample.
Q5. Explain the nature of the groundwater condition in shallow open wells in alluvial soil. Define critical depression head, safe working head and maximum safe yield.
Explain how safe yield and specific capacity of shallow open wells are determined.
A well 3 m ilia has a normal water level of 3 m bgl. By pumping, the water level is depressed to 9 m bgl. In a time interval of 4 hours, the water level rises by 4·5 Determine the specific yield of the well. What is the safe yield of the well if the working depression head is3·5
Q6. Explain how the hydrogeomorphic map is prepared and how it is used in delineating groundwater potential zones.
Discuss the seismic refraction method of prospecting and how it is useful in groundwater exploration.
Discuss the different methods of interpretation of resistivity data with special reference to the curve matching technique.
Q7 What are the methods of construction of tube-wells Describe the cable tool method of drilling tube-wells.
What are the well development procedures followed in completion of a well for optimum yield ?Discuss how the yield of a well is determined.
What are well-logging techniques and how are they useful
Q8. Write notes on the following:
TDS
Total Hardness
Salt Index
SAR
Sodium Percentage
Illustrate the following types of water quality plots
Stiff diagram
Pie diagram
Piper trilinear diagram
Explain freshwater-saline water interface in a coastal area. Discuss the precautionary measures to control sail water intrusion in coastal areas.
Q9. Discuss the problem of arsenic contamination and associated health hazards in our country. Comment on the remedial measures for controlling arsenic contamination.
Elaborate on the idea of conjunctive use of surface and groundwater and its benefits.
write notes on the following
Groundwater Legislation
Water-logging
Managed Aquifer Recharge
Specific Yield and Specific Retention
Major Hydrogeomorphic Features of Arid Regions
Spectral Resolution in Remote Sensing
Principle of Resistivity Survey
Stable Isotopes in Hydrology
Ghyben-Herzberg Relationship
RooftopRainwater Harvesting
Application of Darcy'sLaw
Q2. Diagrammatically describe the occurrence of groundwater in the zone of aeration and the zone of saturation demarcating the water table. Add a note on hydrographs.
Schematically describe the hydrological cycle. Discuss about the water balance equation.
Write notes on the following:
porosity and permeability
Meteoric water and Magmatic water
Hydrostratigraphic Unit
Q3. Define transmissivity and storage coefficient. Discuss how they are determined.
Differentiate between drainage basin and groundwater basin. Give an account of the major hydrogeological features of hard rock terrain in
India.
Describe the occurrence of groundwater in the Indo-Gangetic alluvial province.
Q4. Distinguish between ground surface contour and water table contour. Explain how the water table contour map is prepared and state its uses.
Water levels of three wells are given below. Find out the flow direction.
W1 15.60m
O
O
W3 15.20m
O
W2 14.80m
Explain the laboratory method of determining the permeability of fine grained soil.
During a falling head permeability test on a soil sample of 10 cm diameter and 20 cm length, the head in the stand pipe of 2 cm diameter dropped from 50 cm to 25 cm in 2 minutes. Determine the permeability of the sample.
Q5. Explain the nature of the groundwater condition in shallow open wells in alluvial soil. Define critical depression head, safe working head and maximum safe yield.
Explain how safe yield and specific capacity of shallow open wells are determined.
A well 3 m ilia has a normal water level of 3 m bgl. By pumping, the water level is depressed to 9 m bgl. In a time interval of 4 hours, the water level rises by 4·5 Determine the specific yield of the well. What is the safe yield of the well if the working depression head is3·5
Q6. Explain how the hydrogeomorphic map is prepared and how it is used in delineating groundwater potential zones.
Discuss the seismic refraction method of prospecting and how it is useful in groundwater exploration.
Discuss the different methods of interpretation of resistivity data with special reference to the curve matching technique.
Q7 What are the methods of construction of tube-wells Describe the cable tool method of drilling tube-wells.
What are the well development procedures followed in completion of a well for optimum yield ?Discuss how the yield of a well is determined.
What are well-logging techniques and how are they useful
Q8. Write notes on the following:
TDS
Total Hardness
Salt Index
SAR
Sodium Percentage
Illustrate the following types of water quality plots
Stiff diagram
Pie diagram
Piper trilinear diagram
Explain freshwater-saline water interface in a coastal area. Discuss the precautionary measures to control sail water intrusion in coastal areas.
Q9. Discuss the problem of arsenic contamination and associated health hazards in our country. Comment on the remedial measures for controlling arsenic contamination.
Elaborate on the idea of conjunctive use of surface and groundwater and its benefits.
write notes on the following
Groundwater Legislation
Water-logging
Managed Aquifer Recharge