3.1.3. Rainfall Variability with Distance between Pairs of Gauges

To understand the relationship between different farmer fields across the study site, we calculated random distances for rain gauge pairs and rainfall variability using a variogram cloud analysis in QGIS. In Appendix A, we present different distances and rainfall variances for pairs of rain gauges randomly picked in different directions (angles). The greatest variance under closely spaced rain gauges occurred at the shortest distance of 164.4 m during SES2. The maximum variance between rain gauges in the area was 27,192.0 mm<sup>2</sup> during SES1. This difference shows that it is possible for a high rainfall season to have a significant variation between a closely (164.4 m) spaced pair of rain gauges. However, higher variation occurred during SES1 with low rainfall (27,192.0 mm2). In general, the average variance was higher in SES1 (3110.4 mm2) than in SES2 (901.8 mm2), which implies that, even for total seasonal rainfall, the variation was high under low rainfall in SES1 and low under comparatively high rainfall in SES2.
