Heat Module benchmarks: Difference between revisions

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So on average for points that in both cases have a similar spatial situation the difference in calculated PET is 0.68%.
So on average for points that in both cases have a similar spatial situation the difference in calculated PET is '''0.68%'''.


==Setup==
==Setup==

Revision as of 13:51, 27 September 2019

This page describes benchmarks performed for the Heat Stress Module.


This benchmark is mention in DPRA Heat stress report. It is relevant because there are also bikemeasurements

The PET Benchmark result overlays can be seen below:

Pet 2013 12 utc herwijnen.png Pet 2 augustus 2013 12 utc tygron.pngPet legend.png

Point Measurement Analysis

Several points have been compared for results. These points across the map have been selected based on fact that their spatial situation (i.e. input data like foliage and vegetation fraction) is similar for both the Wageningen calculated PET and Tygron generated PET.

Wageningen 2013 08 02 measurementpoints.png
id Wageningen PET Tygron PET Difference (%)
01 46.12 46.13 0.022
02 47.44 48.04 1.26
03 47.11 47.52 0.87
04 44.70 44.99 0.65
05 40.53 40.48 -0.12
06 38.69 38.67 -0.05
07 42.52 42.45 -0.16
08 44.87 44.03 -1.87
09 43.62 43.02 -1.38
10 46.79 46.58 -0.45
11 38.70 38.79 0.23
12 44.40 44.00 -0.90
13 46.34 46.29 -0.11
14 45.58 45.77 0.42
15 39.05 39.42 0.95
16 38.22 38.28 0.16
17 43.23 43.88 1.50
18 46.34 46.49 0.32
19 45.59 44.84 -1.65
20 46.21 45.96 -0.54
Average 0.68

So on average for points that in both cases have a similar spatial situation the difference in calculated PET is 0.68%.

Setup

The used values are:

Variable Value
Date 02-08-2013
Hour of day 14
Sun altitude 55.5
Sun azimuth 186.9
Sun daily motion factor 0.063
Humidity (%) 56
Sun radiation (W/m2) 774
Temperature (°C) 31.7
Wind speed (m/s) 4
Wind direction (°) 140
Daily min. temperature (°C) 18.9
Daily max. temperature (°C) 34.1
Daily avg. radiation (W/m2) 455
Daily avg. wind speed 3.17

The foliage height will be defined by a Geotiff. See the images (overview and zoomed in east-south-east corner) below:

Foliage heights wageningen.png Foliage heights wageningen zoomed.png Foliage legend.png

Calculation time

The calculation time of the PET overlay of 1 timeframe on a 1x1 meter grid for a 4x4km area of Wageningen is +-16 seconds.

See also