The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

• A. Q/Q = (1/2) × (dH/H)
• B. Q/Q = (3/4) × (dH/H)
• C. Q/Q = (dH/H)
• D. Q/Q = (3/2) × (dH/H)