{"id":14089,"date":"2021-01-26T13:48:27","date_gmt":"2021-01-26T12:48:27","guid":{"rendered":"https:\/\/www.ecoshape.org\/en\/?post_type=project&p=14089"},"modified":"2021-01-26T14:24:07","modified_gmt":"2021-01-26T13:24:07","slug":"operation-and-maintenance","status":"publish","type":"project","link":"https:\/\/www.ecoshape.org\/en\/cases\/marconi-salt-marsh-development\/operation-and-maintenance\/","title":{"rendered":"Operation and maintenance"},"content":{"rendered":"\n

Execution of the monitoring program<\/h3>\n\n\n\n

Intensive monitoring of the development of morphology and biodiversity of the salt marsh started in November 2018 and continued until September 2020.<\/p>\n\n\n\n

Repeated measurements (either 2 or 3 monthly, half yearly or yearly) were conducted in Permanent Quadrants (PQ\u2019s). In each of the compartments (B, C, D, E Seeded, E not Seeded, F Seeded, F Not seeded, G Seeded and G Not seeded), three PQ\u2019s\u2019 were defined: one seaward, one in the middle and one landward.<\/p>\n\n\n\n

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Overview of the monitoring at the Marconi salt marsh.<\/em><\/figcaption><\/figure>\n\n\n\n
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Monitoring locations at the pilot salt marsh Marconi Delfzijl. Ns = not seeded, s = seeded. Background: aerial photograph of 2018 (beeldmateriaal.nl).<\/em><\/figcaption><\/figure>\n\n\n\n

Vegetation diversity and density, presence of microphytobenthos, the sediment composition and the bed level changes were periodically observed in and near all PQ\u2019s. RTK-DGPS measurements were performed to assess the development of the tidal creeks through the inlets in the brushwood groynes and the subsidence of the salt marsh. Continuous measurements were executed for a year or more to assess hydrodynamic exposure (water levels, inundation time and inundation frequency) and observe continuous bed level change, also at other locations than the PQ\u2019s. Finally, LiDAR and Orthophotos were taken each half year to obtain fully covering Digital Terrain Models and vegetation cover.<\/p>\n\n\n\n

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Measurements of elevation and land subsidence at the Marconi pilot salt marsh.<\/em><\/figcaption><\/figure>\n\n\n\n