Critical Flow for Water Management in a Shallow Tidal River Based on Estuarine Residence Time

Huang, Wenrui; Liu, Xiaohai; Chen, Xinjian; Flannery, Michael S.

doi:10.1007/s11269-011-9813-2

Cited by 19 publications

(9 citation statements)

References 24 publications

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“…As expected, and observed in similar studies in the literature, Rt is a physical parameter directly dependent on, and sensitive to, the physical features of waterbodies and of their seasonal variations. Therefore, it has been used as important primary indicator in studies related to the quality of the water [25][26][27][28][72][73][74][75][76][77][78].…”

Section: Discussionmentioning

confidence: 99%

Hydrodynamic Modeling and Simulation of Water Residence Time in the Estuary of the Lower Amazon River

Abreu

Barros

Brito

et al. 2020

Water

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Studies about the hydrodynamic behavior in the lower Amazon River remain scarce, despite their relevance and complexity, and the Water Residence Time (Rt) of this Amazonian estuary remains poorly unknown. Therefore, the present study aims to numerically simulate three seasonal Rt scenarios based on a calibrated hydrodynamic numerical model (SisbaHiA) applied to a representative stretch of the lower Amazon River. The following methodological steps were performed: (a) establishing experimental water flow in natural channels; (b) statistically test numerical predictions (tidal range cycles for different hydrologic periods); and (c) simulating velocity fields and water discharge associated with Rt numerical outputs of the hydrodynamic model varied from 14 ≤ Rt ≤ 22 days among different seasonal periods. This change has shown the significant influence of hydrologic period and geomorphological features on Rt. Rt, in its turn, has shown significant spatial heterogeneity, depending on location and stretch of the channels. Comparative analyses between simulated and experimental parameters evidenced statistical correlations higher than 0.9. We conclude that the generated Rt scenarios were consistent with other similar studies in the literature. Therefore, they depicted the applicability of the hydrodynamics to the conservation of the Amazonian aquatic ecosystem, as well as its relevance for biochemical and pollutant dispersion studies, which still remain scarce in the literature.

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Section: Discussionmentioning

confidence: 99%

Hydrodynamic Modeling and Simulation of Water Residence Time in the Estuary of the Lower Amazon River

Abreu

Barros

Brito

et al. 2020

Water

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“…during neap tides (3-4 m; Yuan et al 2007). Liu et al (2008) for the Danshuei River Estuary (Taiwan), which is at the lower end of the macrotidal range, and by Huang et al (2011) for the microtidal Little Manatee Estuary, Florida, USA, demonstrated that residence time decreases with increasing freshwater inflow ( Figure 7). These trends were described effectively by an exponential regression equation (r 2 = 0.93) and power-law function (r 2 = 0.98), respectively.…”

Section: Residence and Flushing Timesmentioning

confidence: 99%

The Contrasting Ecology of Temperate Macrotidal and Microtidal Estuaries

Tweedley¹,

Warwick²,

Potter³

2016

Oceanography and Marine Biology - An Annual Review

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Tidal range is a master factor governing the differences in physico-chemical and biological characteristics between microtidal (<2 m) and macrotidal (>2 m) estuaries, which, for convenience, thus include mesotidal estuaries (2-4 m). Microtidal estuaries differ from macrotidal estuaries in geomorphology, tidal water movements, salinity regimes, residence times, turbidity, sedimentology and intertidal area. Consequently, their phytoplankton, microphytobenthos and macrophytes communities differ in biomass and production, areal extent, distribution patterns and composition. Mesozooplankton comprise predominantly autochthonous species in microtidal estuaries and allochthonous species in macrotidal estuaries. Meiobenthos in microtidal estuaries have greater densities in subtidal than intertidal areas and species persist along the estuary. Macrobenthos is dominated by small depositfeeding species in microtidal estuaries, whereas macrotidal estuaries contain some larger species and suspension feeders. Species richness and abundance of estuarine-resident fish species and the contributions of diving piscivorous birds and wading invertebrate-feeding birds are greater in microtidal estuaries. As paradigms regarding estuarine ecology have been based mainly on northern hemisphere macrotidal systems, this review has redressed this imbalance by detailing the extent of differences between microtidal and macrotidal estuaries. In particular, it uses data and case studies for southern hemisphere microtidal systems to demonstrate that the physico-chemical characteristics and ecology of the main flora and fauna of microtidal estuaries are frequently not consistent with those paradigms.

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“…Finding a general regression relationship between the residence time and the freshwater input would be helpful in understanding the physical and hydrological processes in the estuary. Huang et al [40] conducted regression analyses between estuarine residence time and freshwater input using a power-law function in Little Manatee River, Florida. The authors found that regression by the power law provided a better fit compared to an exponential function.…”

Section: Residence Time In Response To Sea Level Risementioning

confidence: 99%

Assessing the Impacts of Sea Level Rise on Salinity Intrusion and Transport Time Scales in a Tidal Estuary, Taiwan

Liu

2014

Water

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Global climate change has resulted in a gradual sea level rise. Sea level rise can cause saline water to migrate upstream in estuaries and rivers, thereby threatening freshwater habitat and drinking-water supplies. In the present study, a three-dimensional hydrodynamic model was established to simulate salinity distributions and transport time scales in the Wu River estuary of central Taiwan. The model was calibrated and verified using tidal amplitudes and phases, time-series water surface elevation and salinity distributions in 2011. The results show that the model simulation and measured data are in good agreement. The validated model was then applied to calculate the salinity distribution, flushing time and residence time in response to a sea level rise of 38.27 cm. We found that the flushing time for high flow under the present condition was lower compared to the sea level rise scenario and that the flushing time for low flow under the present condition was higher compared to the sea level rise scenario. The residence time for the present condition and the sea level rise scenario was between 10.51 and 34.23 h and between 17.11 and 38.92 h, respectively. The simulated results reveal that the residence time of the Wu River estuary will increase when the sea level rises. The distance of salinity intrusion in the Wu River estuary will increase and move further upstream when the sea level rises, resulting in the limited availability of water of suitable quality for municipal and industrial uses.

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Critical Flow for Water Management in a Shallow Tidal River Based on Estuarine Residence Time

Cited by 19 publications

References 24 publications

Hydrodynamic Modeling and Simulation of Water Residence Time in the Estuary of the Lower Amazon River

Hydrodynamic Modeling and Simulation of Water Residence Time in the Estuary of the Lower Amazon River

The Contrasting Ecology of Temperate Macrotidal and Microtidal Estuaries

Assessing the Impacts of Sea Level Rise on Salinity Intrusion and Transport Time Scales in a Tidal Estuary, Taiwan

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