WMOD00234

• Contract/Permit #: #93-5
• Applicant: Western Kansas Groundwater
• Project Name: Kansas Weather Modification
• Date: 1/1/1993
• Weather Modification - Doc Type: Report

In an attempt to find the amount of crop saved due to hail
suppression we know the Estimated crop Hail Loss (ECHL) must be
smaller than what the total crop hail loss would be had there been
no cloud seeding. NOTE: This implies that hail suppression works to
some degree or another. We will call the Total Crop Hail Loss
(TCHL). Mathematically it is represented as:

TCHL = ECHL + (TCHL) x (P)

Where P is the expected percentage decrease in hail, then

and,

TCHL - [(TCHL) x P] = ECHL
TCHL(l - P) = ECHL

or

TCHL =

(ECHL)
(1 - P)

Then,

Crop Saved = TCHL - ECHL

or, substituting

Crop Saved =

IECHL)
(1 - P)

(ECHL)

and

Crop Saved =

IECHL) x f1 - II - P))
(1 - P)

clearing terms,

Crop Saved = (ECHL) x I P )
(1 - P)

For instance, if we assume there was as little as a 10%

reduction in hail, then,

Crop Saved = (EHCL) x 10.1) = (ECHLl
(0.9) 9

,

for a 20% reduction, Crop Saved = (EHCL) x 10.2) = IEHCL)
0.3 4

for a 25% reduction, Crop Saved = IEHCL)
3

for a 30% reduction, Crop Saved = (.30) x (EHCL) = (3/7) x (EHCL)
(1 - 0.3)

and for a 35% reduction the Crop Saved = (7/13) x (EHCL)

47