Water-Resources Investigations Report 03-4167

Evaluation of OTT PLUVIO Precipitation Gage versus Belfort Universal Precipitation Gage 5-780 for the National Atmospheric Deposition Program

By Mary L. Tumbusch

Report availability: Portable Document Format (PDF).

CONTENTS

Abstract

Introduction

Purpose and Scope

Acknowledgments

Approach

Instrumentation

Belfort Universal Precipitation Gage 5-780

OTT PLUVIO Precipitation Gage

NovaLynx Model 260-2510 Standard Rain and Snow Gage

Phase III Testing

Results

Comparison of Data from Belfort Universal Precipitation Gage 5-780 and OTT PLUVIO Precipitation Gage

• Site AL99
• Site IL11
• Site MN16
• Site NV03
• Site PA15
• Site WY95

Comparison of Data from NovaLynx Model 260-2510 Standard Rain and Snow Gage, with Data from Belfort Universal Precipitation Gage 5-780 and OTT PLUVIO Precipitation Gage

• Site IL11
• Site PA15

Summary

References Cited

FIGURES

1. Map showing location of NADP/NTN sites across the conterminous United States
2. Photograph showing Belfort 5-780 precipitation gage, at site NV03, showing Belfort rotating chart
3. Photographs showing (A) OTT PLUVIO precipitation gage with stainless steel housing, at site NV03. (B) OTT PLUVIO precipitation gage with stainless steel housing removed showing collection bucket and data logger
4. (A) Sketch map showing placement of OTT PLUVIO and Belfort 5-780 precipitation gages and Aerochem sample collector at site NV03. (B) Photograph of site NV03 looking north
5. Boxplots showing differences, in inches, between the daily precipitation measured by the Belfort 5-780 and OTT PLUVIO precipitation gages

6-12. Graphs showing (A) Cumulative precipitation. (B) Frequency analysis of the difference between precipitation measurements by Belfort 5-780 gage minus OTT PLUVIO precipitation gage:

• 6. Site AL99
  7. Site IL11 East
  8. Site IL11 West
  9. Site MN16
  10. Site NV03
  11. Site PA15
  12. Site WY95

13. Graph showing cumulative precipitation from the Belfort 5-780 and OTT PLUVIO precipitation gages, and NovaLynx Model 260-2510 Standard Rain and Snow Gage at site IL11
14. Graph showing differences, in inches, of precipitation measurements between the Belfort 5-780 and OTT PLUVIO precipitation gages, and the NovaLynx Model 260-2510 Standard Rain and Snow Gage at site IL11
15. Graph showing cumulative precipitation from the Belfort 5-780 and OTT PLUVIO precipitation gages, and NovaLynx Model 260-2510 Standard Rain and Snow Gage at site PA15
16. Graph showing differences, in inches, of precipitation measurements between the Belfort 5-780 and OTT PLUVIO precipitation gages, and the NovaLynx Model 260-2510 Standard Rain and Snow Gage at site PA15

TABLES

1. Differences of precipitation measurements, between the OTT PLUVIO and Belfort 5-780 precipitation gages, collected at the National Trends Network sites during Phase III evaluation
2. Differences of measurements at the National Trends Network sites using the paired t-test and the Wilcoxon signed-rank test during Phase III evaluation
3. Differences of precipitation measurements, between the OTT PLUVIOand Belfort 5-780 precipitation gages, and the NovaLynx Model 260-2510 Standard Rain and Snow Gage, for 144 precipitation events, using the paired t-test and Wilcoxon signed-rank test during Phase III evaluation
4. Differences of precipitation measurements, between the OTT PLUVIO and Belfort 5-780 precipitation gages, and the NovaLynx Model 260-2510 Standard Rain and Snow Gage, for 150 precipitation events, at site PA15

Return to WRIR 03-4167 or the Abstract.

For more information about USGS activities in Nevada, visit the USGS Nevada District home page.