SIST EN 13798:2010

Hydrometry - Specification for a reference raingauge pit

This European Standard specifies the design of a reference raingauge pit. The reference raingauge pit is designed for the liquid precipitation only. The specified details of the pit and the grating, are purposely kept to a minimum in order to allow each raingauge operator latitude in their construction and to suit local conditions.

Hydrometrie - Spezifikation für eine Grube für Referenz- Regenmesser

Diese Europäische Norm legt die Konstruktion einer Grube für Referenz-Regenmesser fest. Die Grube für Referenz-Regenmesser ist nur für flüssigen Niederschlag vorgesehen. Die vorgegebenen Einzelheiten für Grube und Gitterrost sind aus Gründen der Zweckmäßigkeit nicht umfangreich, um jedem Benutzer eines Regenmessers Spielraum beim Bau entsprechend den örtlichen Bedingungen zu lassen.

Hydrométrie - Spécification pour une fosse de référence d'installation d'un pluviomètre

La présente Norme européenne spécifie la conception d’une fosse de référence pour l’installation d’un pluviomètre. Elle est conçue uniquement pour les précipitations sous forme liquide. La fosse et son caillebotis sont volontairement peu détaillés pour laisser toute latitude possible aux exploitants de réseaux pluviométriques dans leurs installations et s’adapter au mieux aux conditions locales.

Hidrometrija - Specifikacija referenčnega jaška za postavitev dežemera

Ta evropski standard določa načrt referenčnega jaška za postavitev dežemera. Referenčni jašek za postavitev dežemera je načrtovan samo za tekoče padavine. Navedeni detajli jaška in rešetk so namenoma na minimalni ravni, da dopuščajo vsakemu operaterju jaška svojo širino pri izgradnji ter da ustrezajo lokalnim pogojem.

General Information

• Status: Published
• Public Enquiry End Date: 02-Apr-2009
• Publication Date: 12-Jul-2010
• ICS: 07.060 - Geology. Meteorology. Hydrology
• ICS: 17.120.01 - Measurement of fluid flow in general
• Technical Committee: IMIN - Measurement instruments
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2010
• Due Date: 05-Sep-2010
• Completion Date: 13-Jul-2010
• Ref Project: EN 13798:2010 - Hydrometry - Specification for a reference raingauge pit

Relations

• Replaces: SIST EN 13798:2002 - Hydrometry - Specification for a reference raingauge pit
• Effective Date: 01-Sep-2010

Overview

EN 13798:2010 is a CEN European Standard (CEN/TC 318) that specifies the design and installation principles for a reference raingauge pit used in hydrometry and meteorological precipitation measurement. The standard covers pits intended for liquid precipitation only, defines minimum design details so operators can adapt construction to local conditions, and supersedes EN 13798:2002.

Key Topics and Requirements

• Purpose: Provide a reproducible, sheltered installation for raingauges to reduce wind and splash errors and to support comparability and field intercomparisons.
• Pit dimensions and form: Normally square in plan; minimum depth 300 mm. Specified dimensions are recommended but not critical; tolerances allowed to suit local needs.
• Grating specifications:
  • Grating bar spacing: 125 ± 5 mm.
  • Bar/strip thickness: not more than 5 mm (material-dependent; e.g., ~2 mm for galvanized steel).
  • Grating top level must equalize with soil/grass level to avoid flow disturbance.
  • Grating must be strong (walkable) or split into sections for access. Rounding top edges reduces splashing.
• Raingauge positioning: The gauge orifice must be level with the top of the grating and centred. The central square in the grating should be 200–300 mm larger than the collector diameter to avoid splash from grating.
• Construction materials and support: Pit walls may be brick, concrete, corrugated iron, plastic, preserved wood, etc., and must be supported to prevent collapse. Supports around edges/corners to rest the grating.
• Drainage and base: Base must permit correct gauge installation and drainage (gravel overlay or pump for high-precipitation sites). Plastic sheeting that impedes drainage is not acceptable. Optional central recess or pumping arrangement for excess water.
• Maintenance: Keep surrounding grass trimmed (maximum approx. 2 cm), remove debris from grating, control weeds.

Applications and Users

• National meteorological services and hydrometric networks for reference precipitation measurements.
• Field intercomparisons, calibration sites and research stations evaluating raingauge performance or wind effects.
• Instrument manufacturers, suppliers and site engineers specifying or installing reference pits for accurate rainfall monitoring.
• Environmental and water-resources practitioners implementing standardized measurement infrastructure.

Related Standards and References

• EN 13798:2002 (superseded by EN 13798:2010)
• WMO Guide to Meteorological Instruments and Methods of Observation (WMO No. 8) - referenced for broader meteorological instrument practice.
• CEN/TC 318 Hydrometry context and national implementation rules.

Keywords: reference raingauge pit, raingauge pit design, hydrometry standard, precipitation measurement, grating specifications, raingauge installation, drainage, meteorological instrumentation.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HPHUDHydrometrie - Spezifikation für eine Grube für Referenz- RegenmesserHydrométrie - Spécification pour une fosse de référence d'installation d'un pluviomètreHydrometry - Specification for a reference raingauge pit17.120.01VSORãQRMeasurement of fluid flow in general07.060Geologija. Meteorologija. HidrologijaGeology. Meteorology. HydrologyICS:Ta slovenski standard je istoveten z:EN 13798:2010SIST EN 13798:2010en,fr,de01-september-2010SIST EN 13798:2010SLOVENSKI
STANDARDSIST EN 13798:20021DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13798
June 2010 ICS 07.060 Supersedes EN 13798:2002English Version
Hydrometry - Specification for a reference raingauge pit
Hydrométrie - Spécification pour une fosse de référence d'installation d'un pluviomètre
Hydrometrie - Spezifikation für eine Grube für Referenz-Regenmesser This European Standard was approved by CEN on 26 May 2010.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
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B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13798:2010: ESIST EN 13798:2010

2 Design and construction of the reference raingauge pit Figures 1 to 6 show the design of the pit, including the required dimensions of the pit and the grating, and the method of installation of the raingauge. The specified dimensions are not critical, but shall be used whenever possible. Variation
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