Threshold 16 : The meteorological, river or coastal conditions or forecasts which initiate (or escalate) the flood warning dissemination process. Sometimes called triggers, criteria, warning levels, alert levels or alarms
Kevin Sene, Flood Warning, Forecasting and Emergency Response, Glossary, ISBN:978-3-540-77852-3, Spring Science + Business Medi B.V., UK 2008. http://download.springer.com/static/pdf/582/bbm%25 3A978-3-540-77853-0%252F1.pdf?auth66=1427020587_db f60e3c970b67bff45ac7d55179c4f0&ext=.pdf, (ND Emr/ Flood - Brit) {908}