The 'water table contour' map is used to determine:
Choose the correct answer
Elevation of ground surface only
Direction of groundwater flow (perpendicular to contours), hydraulic gradient, and flow quantity
Surface water drainage pattern
Soil type distribution
Correct Answer
B. Direction of groundwater flow (perpendicular to contours), hydraulic gradient, and flow quantity
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Water table contour (groundwater isopotential) map: contours of equal depth to water table. From the map: (1) Direction of groundwater flow (perpendicular to contours, toward lower head); (2) Hydraulic gradient i = Δh/L between contours; (3) Flow per unit width q = ki×b; (4) Areas of groundwater recharge vs discharge. Used for: groundwater management, contamination plume tracking.
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