Section 4: Soil and Water Conservation Engineering
Hydrology
Subtopic: Hydrological cycle and measurement of its components
Question Statement:
The following data were collected from two piezometers P and Q located adjacent to each other in a groundwater basin. R.L. of the ground surface (m): P=220, Q=220. Depth of piezometer (m): P=120, Q=90. Depth to groundwater level from ground surface (m): P=60, Q=50. Hydraulic heads in m at P and Q respectively will be
Options:
(A) 100, 130
(B) 160, 170
(C) 60, 40
(D) 170, 160
Official Answer Key:
B
Step-by-Step Solution & Explanation
Hydraulic head (piezometric elevation) at each point = R.L. of ground surface − depth to groundwater level below ground surface. Head at P = 220 − 60 = 160 m. Head at Q = 220 − 50 = 170 m.
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