Hydrology & Water Resources Engineering - Vol 1 | 6. Measurement of Precipitation – Recording and Non-Recording Types by Abraham | Learn Smarter
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6. Measurement of Precipitation – Recording and Non-Recording Types

Precipitation measurement is essential for water resource management and hydrology, employing various instruments categorized as recording or non-recording types. The chapter reviews the characteristics of these instruments, the methods of measuring precipitation, and the importance of accurate data collection in predicting water availability and managing agricultural resources effectively.

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Sections

  • 6

    Measurement Of Precipitation – Recording And Non-Recording Types

    This section discusses the importance of accurate precipitation measurement and categorizes methods into recording and non-recording types, detailing various gauges used for measurement.

    Learning Practice

  • 6.1

    Characteristics Of Precipitation Measurement

    This section outlines the essential parameters for measuring precipitation and distinguishes between recording and non-recording instruments.

    Learning Practice

  • 6.2

    Non-Recording Rain Gauges

    Non-recording rain gauges are basic tools for measuring rainfall over time, providing total collected precipitation without capturing intensity or time variation.

    Learning Practice

  • 6.2.1

    Symons Rain Gauge (Standard Non-Recording Type)

    The Symons rain gauge is a standard non-recording device used in precipitation measurement, focusing on rainfall amount collection without details on intensity or timing.

    Learning Practice

  • 6.2.2

    Limitations Of Non-Recording Gauges

    Non-recording rain gauges, while simple and effective for collecting rainfall data, have significant limitations that affect their reliability and utility.

    Learning Practice

  • 6.3

    Recording Rain Gauges

    Recording rain gauges provide continuous measurements of precipitation, enhancing the accuracy of hydrological data collection.

    Learning Practice

  • 6.3.1

    Weighing Bucket Rain Gauge

    The Weighing Bucket Rain Gauge is an automatic instrument that measures accumulated precipitation by utilizing a weighing mechanism, providing both cumulative and intensity data.

    Learning Practice

  • 6.3.2

    Tipping Bucket Rain Gauge

    The tipping bucket rain gauge is a popular automatic instrument for measuring precipitation, designed to provide continuous data on rainfall.

    Learning Practice

  • 6.3.3

    Float Recording Rain Gauge

    The Float Recording Rain Gauge measures accumulated rainfall using a float mechanism that records data onto a rotating chart.

    Learning Practice

  • 6.4

    Modern Electronic And Digital Rain Gauges

    This section discusses modern electronic and digital rain gauges, focusing on their advanced measurement technologies.

    Learning Practice

  • 6.4.1

    Optical Rain Gauges

    Optical rain gauges utilize laser or infrared beams to detect precipitation, providing a non-intrusive and maintenance-free method for measuring rainfall.

    Learning Practice

  • 6.4.2

    Acoustic And Radar Rain Gauges

    Acoustic and radar rain gauges utilize advanced techniques for estimating precipitation over larger areas with accuracy, making them essential for modern meteorology.

    Learning Practice

  • 6.5

    Selection Of Rain Gauges

    The selection of rain gauges is influenced by factors such as purpose, budget, climatic conditions, and topography.

    Learning Practice

  • 6.6

    Gauge Network And Density

    The section discusses the importance of gauge density and distribution in accurately measuring rainfall data, highlighting recommendations by the WMO.

    Learning Practice

  • 6.7

    Common Errors In Precipitation Measurement

    This section discusses the common errors that can occur in precipitation measurement, highlighting instrumental, observation, siting, and wind-induced errors.

    Learning Practice

  • 6.8

    Maintenance And Calibration

    This section emphasizes the importance of regular maintenance and calibration of rainfall measuring instruments to ensure their accuracy.

    Learning Practice

  • 6.9

    Data Presentation

    This section discusses the various methods for presenting rainfall data, emphasizing the importance of clear representation for analysis and operational purposes.

    Learning Practice

References

Chapter_6_Measur.pdf

Class Notes

Memorization

What we have learnt

  • Precipitation measurement i...
  • Recording rain gauges provi...
  • Accuracy in precipitation m...

Final Test

Revision Tests