WMOD00425

• Title: Demonstration of Improved Operational Water Resources Management Through Use of Better Snow Water Equivalent Information
• Date: 9/1/2002
• Weather Modification - Doc Type: Report

CONTENTS - Continued

Page

9. Recommendations for Future Work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 56
9 .1 Precipitation-Typing Refinements ....................................... 56
9.2 Other Refinements ................................................... 57
10. Summary and Recommendations ........................................... 58

11. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 61

APPENDIX

Appendix

A RADAR 14.F -Program Units and Descriptions ......................... 67

TABLES

Table

1 Range, FR, and clearance, Fc, correction factors as a function of range
in kIn for the 0.50 tilt (assuming flat terrain), a = 150, and p = 2.0 . . . . . . .. 18
2 Square of the linear correlation coefficient ~ between radar algorithm
(SAA and P AA) R and gauge amount G for each case stratified by range .. 50
3 Offset and variability for the PAA RIG versus G ratios for five case studies,
expressed as factors relative to the gauge readings .................... 51

FIGURES

Figure

1 Plots of individual relations for variation of alpha with range .... . . . . . . . . .. 13
2 North-central United States composite WSR-88D set of 11 radars
from KDLH to KTFX, as displayed on Reclamation web site. . . . . . . . . . .. 14
3 Examples of hybrid scan and its possible effect on S . . . . . . . . . . . . . . . . . . . .. 16
4 Relation between a and beam clearance for several radars

(colored curves) ............................................... 17

5 Range and clearance correction factors as a function of range for
the 0.5-degree beam for old range correction and new clearance
correction (both with a = 150 and p = 2.0) .......................... 18

viii

I
I
,I
'I
I
I
I

v

I
I
I
I
I
I
I
I
I
I
I
I