Hydrometry - Specification for a reference raingauge pit

This document establishes the technical requirements and test methods for rain gauges used in hydrological observations. It specifies the constructional features, performance characteristics, and installation guidelines necessary to ensure accurate measurement of precipitation intensity and accumulation. The standard covers various types of tipping bucket and weighing gauges, defining their operational limits under different environmental conditions. It outlines the procedures for verifying the accuracy of measurement devices and addresses factors that could influence the reliability of collected data. Compliance with these specifications enables consistent monitoring of rainfall patterns across different regions. The text details calibration protocols and maintenance intervals to support long-term data quality. These guidelines are essential for engineers and meteorologists involved in water resource management and flood forecasting systems. By adhering to the defined parameters, users can achieve a standardized approach to precipitation measurement. The content focuses on the technical specifications required for the design, fabrication, and evaluation of the instruments themselves without addressing broader regulatory frameworks or national implementation strategies.