Hydrometry. Liquid flow measurement using end depth method in channels with a free overfall Ingestion-build-95349 Note 3: BS EN 61143-1

Note 3: BS EN 61143-1 does not contain requirements concerning the dimensions of instruments or accessories (for the former

BS EN 16751 cannot be used to make claims that operations or products are sustainable since it does not establish thresholds or limits

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Where specific requirements in this part are modified from the general requirements in EN 16842-1

3 Method using cut-off filters

Hydrometry. Liquid flow measurement using end depth method in channels with a free overfall Ingestion-build-95349 Note 3: BS EN 61143-11 Scope This document specifies a method for the estimation of the sub critical flow of clear water in a smooth, essentially horizontal channel (or a gently sloping channel), abruptly discontinued at bottom by a hydraulic structure, with a vertical drop and discharging freely. Such an overfall forms a control section and offers a means for the estimation of flow using the end depth measurement method. A wide variety of channel cross sections with