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SWIM Bathing Water Sampling for Reactive Microbiology Analysis

This project aims to provide microbiological, meteorological, and hydrological data for the development of SWIM predictive models. Through historical compliance data and reactive sampling during significant rainfall events, the project determines when and where to sample bathing waters. The research prioritizes bathing waters in Ballyholme, Ballywalter, Cargan Dam Reservoir, and Fofanny Dam Reservoir for analysis.

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SWIM Bathing Water Sampling for Reactive Microbiology Analysis

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  1. SWIM PAG Oct 2019 SWIM: NI bathing water reactive sampling (IVA5032) Malcolm Taylor AFBI

  2. When to sample, where to sample • Provision of microbiological, meteorological, hydrological data • Development of SWIM predictive model • Historical compliance data • Few Bathing waters elevated microbiology • Reactive sampling, significant rainfall events • Which beach, possible different rainfall- geographic location • Weather forecasts ??? Limited rainfall events • Predictive model • BW prioritisation (BH, WF, NC, PC)

  3. NI Bathing Water Microbiology SWIM bathing waters sampled 2017-2019, primarily during the bathing season (spring and autumn). Ballyholme 2017, sampled hourly over a 12 hr period (*) July 2017 prior to SWIM instrumentation deployment, focus on historical data collection. Subsequent years either sampling multiple beaches in the one day or 8-12hr periods (*).

  4. Ballyholme: 9th Sept 2019 Rainfall (mm) SWIM Ballyholme Weather station, rain gauge blocked, cleaned River Level (m) A B SWIM BallywalterWeather station, note 4.6mm rainfall at 13.00 while Ballyholme , once cleaned registered 0.6mm. Rain peak A , river level rises from 0.22m at 23.30 to 0.29m at 04.45 Rain peak B, river level rises from 0.24m at 07.30 to 0.26m at 08.45 then falling to 0.23m

  5. Ballyholme: 9th Aug 2019 Rainfall (mm) A C B River Level (m) A B C Rain peak A at 05.15, river level rises from 0.38m at 05.00 to 0.74m at 05.45 Rain peak B, at 07.45, river level rises from 0.49m at 07.15 to 0.70m at 08.15 Rain peak C, at 19.30, river level rises from 0.51m at 19.30 to 0.58m at 19.45 Sampling period 03.30 to 12.00.

  6. Ballyholme: Dry event 19th Sept 2018 A River Level (m) A Rainfall (mm), no SWIM Weather station data available on SWIM site, IDS reports 1.1 mm from 07.45 to 08.15 (A).

  7. Fofanny Dam Reservoir NC Evidence: WF CRK PC Cargan Dam Reservoir WF NC BH NC BWR BH

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