WMOD00595

• Title: Lake Oroville Runoff Enhancement Project - Final Report
• Date: 9/1/1995
• Weather Modification - Doc Type: Report

Figure

7.2

7.3

8.1

8.2

8.3

8.4

8.5
8.6

8.7

8.8

8.9

8.10

8.11

8.12

8.13

8.14

8.15

8.16

8.17

8.1Sa

8.1Sb
8.19

8.20

8.21

8.22

CONTENTS - CONTINUED

FIGURES - CONTINUED

Page

Results of target versus control mean precipitation regression analysis for all 87
randomized cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Results of target versus control mean precipitation regression analysis for 60
randomized cases ",,-here GGIDE model predicted seeding effects in the target area. . . . 47
Schematic illustration of mountain waves forming over and to the lee of
the project area .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 49
Rawinsonde determined vertical '-elocities measured along the path of the ascending
balloon for February 10. 1994 ............................................ 49
Balloon deri'-ed vertical velocities plotted v.ith respect to distance from Johnsville for
February'10, 1994 ..................................................... 50
Ra,,,insonde derived vertical velocities for soundings taken during storm events prior
to the passage of the surface cold front ..................................... 52
Same as figure 8.4 but for soundings taken after surface frontal passage . . . . . . . . . . .. 53
Xominal flight tracks used by the KOAA research aircraft during the mid-January to
mid-:\larch 1993 tracer and seeding experiments superimposed over the project area. . . 55
Average SF" concentrations plotted ,...ith respect to altitude for all SFs plume
penetrations from site d7 fEL 2225 m) along the valley track. . . . . . . . . . . . . . . . . . . . . 58
Variables obsen'ed or calculated from aircraft observations made during plume
tracing experiments during v""FR conditions on :\larch 9 along the valley track . . . . . . . . 61
Average SF,:; concentrations plotted ,..ith respect to altitude for all SF" plume
penetrations from site d9 tEL 2146 m! along the valley track. . . . . . . . . . . . . . . . . . . . . 62
Rawinsonde derived vertical velocities for :\larch 17 shO\",ing well defined lee wave
pattern which influenced the transport of SF" on this day ....................... 64
Same as figure 8.8 but for :\larch 9 downv.ind (northeast) from the flight track sho\vn

on figure 8.6 ......................................................... 66

Aircraft-obsen-ed SF" concentrations above 10 pit plotted over target area terrain
contours for :March 9, 1993 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Various parameters obsen-ed at the Jackson Creek Observatory for
February 17, 1993 ................................ _ . . . .. . . . . . . . . . . . . . . . . 68
Temporal plot of meteorological variables measured at :\1t. Hough for
February 17. 1993 ...................................................... 69
Temporal plots of measurements made by the XOA..A aircraft on pass 13 for
February 17, 1993 ...................................................... 71
Same as figure 8.15 but for February 9, 1993, along ridge pass for seeded plume
initiated from site d7 ..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Guide predicted plume from site d7 overlaid onto terrain contours for
February 9, 1993 ......................................................... 73
Guide model predicted particle trajectories from sites d7 and d9 using ra\\insonde
horizontal wind field and the vertical velocities from figure B.18a for 1800 UTe
Februar:r 17~ 1993 ...... _ _ . . _ _ _ . _ . _ . . _ . _ _ . _ . _ _ . . _ _ . . _ . . . _ _ . . . . _ . . _ . . . _ . 75
Same as ~a) but for 2100 LTC for site d7 only ................................. 75
GLIDE model contoured vertical velocities {m so:) across the project area for
1800 LTC, February 17, 1993 .............................................. 76
GUIDE model predicted plume from site d7 along \vith actual aircraft obsen-ed

SF€ plume 0 . . ~ . . . . . . _ . _ . . . : . = . _ . . . . . . . _ . . . . _ . _ . . _ . _ . . _ _ . _ . . _ . _ . _ . . . .. 77

GUIDE model predicted plume from site d9 along ,~ith actual aircraft observed

SF" plume . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . 78

SFE measured by sequential sampler located at site ~o. 8 on figure 2.3 (near JCC) 79

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