Investigation on the effect of estuary shape in propagating salinity intrusion
For one-dimensional salt intrusion models to be predictive, we need predictive equations to link model parameters to observable hydraulic and geometric variables. The onedimensional model of Savenije (1993b) made use of predictive equations for the Van der Burgh Coefficient K and the dispersion at t...
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| Format: | Research Report |
| Language: | English |
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2017
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| Online Access: | http://umpir.ump.edu.my/id/eprint/36422/ http://umpir.ump.edu.my/id/eprint/36422/1/Investigation%20on%20the%20effect%20of%20estuary%20shape%20in%20propagating%20salinity%20intrusion.wm.pdf |
| _version_ | 1848824991199526912 |
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| author | Gisen, Jacqueline Isabella Anak |
| author_facet | Gisen, Jacqueline Isabella Anak |
| author_sort | Gisen, Jacqueline Isabella Anak |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | For one-dimensional salt intrusion models to be predictive, we need predictive equations to link model parameters to observable hydraulic and geometric variables. The onedimensional model of Savenije (1993b) made use of predictive equations for the Van der Burgh Coefficient K and the dispersion at the seaward boundary D0. Here we have improved these equations by using an expanded database, including new previously unsurveyed estuaries. Furthermore, we derived a revised predictive equation for the dispersion at tidal average condition and with the boundary situated at the well identifiable inflection point where the estuary changes from wave-dominated to tidedominated geometry. We used 89 salinity profiles in 30 estuaries (including seven recently studied estuaries in Malaysia), and empirically derived a range of equations using various combinations of dimensionless parameters. We split our data in two separated data sets: (1) with more reliable data for calibration, and (2) with less reliable data for validation. The dimensionless parameters that gave the best performance depended on the geometry, tidal strength, friction and the Richardson number. The limitation of the equations is that the friction is generally unknown. In order to overcome this problem, a coupling has been made with the analytical hydraulic model of Cai et al. (2012), which makes use of observed tidal damping and by which the friction can be determined. |
| first_indexed | 2025-11-15T03:21:49Z |
| format | Research Report |
| id | ump-36422 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T03:21:49Z |
| publishDate | 2017 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-364222023-02-28T07:03:04Z http://umpir.ump.edu.my/id/eprint/36422/ Investigation on the effect of estuary shape in propagating salinity intrusion Gisen, Jacqueline Isabella Anak TA Engineering (General). Civil engineering (General) For one-dimensional salt intrusion models to be predictive, we need predictive equations to link model parameters to observable hydraulic and geometric variables. The onedimensional model of Savenije (1993b) made use of predictive equations for the Van der Burgh Coefficient K and the dispersion at the seaward boundary D0. Here we have improved these equations by using an expanded database, including new previously unsurveyed estuaries. Furthermore, we derived a revised predictive equation for the dispersion at tidal average condition and with the boundary situated at the well identifiable inflection point where the estuary changes from wave-dominated to tidedominated geometry. We used 89 salinity profiles in 30 estuaries (including seven recently studied estuaries in Malaysia), and empirically derived a range of equations using various combinations of dimensionless parameters. We split our data in two separated data sets: (1) with more reliable data for calibration, and (2) with less reliable data for validation. The dimensionless parameters that gave the best performance depended on the geometry, tidal strength, friction and the Richardson number. The limitation of the equations is that the friction is generally unknown. In order to overcome this problem, a coupling has been made with the analytical hydraulic model of Cai et al. (2012), which makes use of observed tidal damping and by which the friction can be determined. 2017 Research Report NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/36422/1/Investigation%20on%20the%20effect%20of%20estuary%20shape%20in%20propagating%20salinity%20intrusion.wm.pdf Gisen, Jacqueline Isabella Anak (2017) Investigation on the effect of estuary shape in propagating salinity intrusion. , [Research Report] (Unpublished) |
| spellingShingle | TA Engineering (General). Civil engineering (General) Gisen, Jacqueline Isabella Anak Investigation on the effect of estuary shape in propagating salinity intrusion |
| title | Investigation on the effect of estuary shape in propagating salinity intrusion |
| title_full | Investigation on the effect of estuary shape in propagating salinity intrusion |
| title_fullStr | Investigation on the effect of estuary shape in propagating salinity intrusion |
| title_full_unstemmed | Investigation on the effect of estuary shape in propagating salinity intrusion |
| title_short | Investigation on the effect of estuary shape in propagating salinity intrusion |
| title_sort | investigation on the effect of estuary shape in propagating salinity intrusion |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://umpir.ump.edu.my/id/eprint/36422/ http://umpir.ump.edu.my/id/eprint/36422/1/Investigation%20on%20the%20effect%20of%20estuary%20shape%20in%20propagating%20salinity%20intrusion.wm.pdf |