sean de guzman, p.e. department of water resources snow … · 2015-12-29 · sean de guzman, p.e....
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Sean de Guzman, P.E. Department of Water Resources Snow Surveys
Number of Stations Reporting
Number of Interpolation Days
Percent of Interpolation Days
2 540 2%
3 7,590 32%
4 10,219 43%
5 251 1%
6 1,318 6%
7 1,544 7%
8 1,834 8%
9 445 2%
15 Total Gauges 23,741 Days Water Years: 1948 to 2013
0
2
4
6
8
10
12
14
Gau
ges R
epor
ting
0
2,000
4,000
6,000
8,000
10,000
12,000
-121 -120.5 -120 -119.5 -119
Elev
atio
n (ft
)
Latitude
HRU Centroids
Gauge_Locations
HRU Gages
Max Elevation (ft) 11,843 5,653
Mean Elevation (ft) 6,271 2,989
Min Elevation (ft) 112 210
0
2
4
6
8
10
12
14
16
0 50 100 150 200 250 300 350 400 450 500 550 600 650
Prec
(in)
HRU
Merced PPT 12/23/1995
Old
New
Station Max
Station Min
Learn spatial characteristics from archive of measured precipitation/temperature
Apply with whatever gage data is available at each time step
y = 0.0002x + 0.2801 R² = 0.811
y = 0.003x + 2.2142 R² = 0.7048
0
2
4
6
8
10
0 500 1000 1500 2000
Max
Dai
ly P
reci
pita
tion
(in)
Avg QPE at Gauge
Max QPE at Gauge
Visually see how DRAPER distributes precipitation spatially
Help calibrate DRAPER for future revisions Continue analysis on more basins
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