Monitoring sediment oxygen demand for assessment of dissolved oxygen distribution in river

Liu, Wen‐Cheng; Chen, Weibo

doi:10.1007/s10661-011-2364-4

Cited by 8 publications

(3 citation statements)

References 24 publications

(24 reference statements)

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“…Seasonally, modeled SOD rate increased three-fold in the lakes and the river, respectively, in summer as compared to winter periods. The estimated SOD rates are within reported values of similar studies for rivers and lakes [15,19,20,[40][41][42]48]. A downward gradient of SOD was observed in the riverine section of the study site.…”

Section: Discussionsupporting

confidence: 88%

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Seasonal Variation in Sediment Oxygen Demand in a Northern Chained River-Lake System

Akomeah

2017

Water

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Sediment oxygen demand (SOD) contributes immensely to hypolimnetic oxygen depletion. SOD rates thus play a key role in aquatic ecosystems' health predictions. These rates, however, can be very expensive to sample. Moreover, determination of SOD rates by sediment diagenesis modeling may require very large datasets, or may not be easily adapted to complex aquatic systems. Water quality modeling for northern aquatic systems is emerging and little is known about the seasonal trends of SOD rates for complex aquatic systems. In this study, the seasonal trend of SOD rates for a northern chained river-lake system has been assessed through the calibration of a water quality model. Model calibration and validation showed good agreement with field measurements. Results of the study show that, in the riverine section, SOD 20 rates decreased from 1.9 to 0.79 g/m 2 /day as urban effluent traveled along the river while a SOD 20 rate of 2.2 g/m 2 /day was observed in the lakes. Seasonally, the SOD 20 rates in summer were three times higher than those in winter for both river and lakes. The results of the study provide insights to the seasonal trend of SOD rates especially for northern rivers and lakes and can, thus, be useful for more complex water quality modeling studies in the region.

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Section: Discussionsupporting

confidence: 88%

“…These rates are within reported ranges for rivers and lakes [15,19,20,40,41]. A SOD 20 rate of 1.9 and 1.7 g/m 2 /day were estimated for reaches 1 and 2 (over two-fold increase compared to reach 3).…”

Section: Spatial and Seasonal Variation Of Sediment Oxygen Demandsupporting

confidence: 86%

Seasonal Variation in Sediment Oxygen Demand in a Northern Chained River-Lake System

Akomeah

2017

Water

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“…SOD is often considered an indicator of the health of the system because sediment structure remains relatively stable while the overlying water conditions can be transient (Chen et al, 2012;Park and Jaffa, 1999;Todd et al, 2009). Therefore, SOD measurement is an important part of water quality investigations of waterbodies (such as riverine systems, aquaculture ponds), and is an important parameter that must be integrated into numerical simulations of water quality (Akomeah and Lindenschmidt, 2017;Liu and Chen, 2012).…”

Section: A C C E P T E Dmentioning

confidence: 99%

Factors driving low oxygen conditions in integrated rice-shrimp ponds

et al. 2019

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Integrated rice-shrimp ponds (IRSPs) are common in areas of Southeast Asia where saltwater intrudes into rice fields in the dry season, enabling rice production in the wet season, and shrimp farming in the dry season or throughout the year. Previous research has highlighted that IRSPs have periods of low dissolved oxygen concentrations which may have a critical effect on shrimp survival. To understand the causes of low dissolved oxygen, this study examined oxygen fluxes at two IRSPs in Ca Mau Province, Vietnam during a two-year period (two wet seasons and two dry seasons). Sediment oxygen demand (SOD) incubations and whole-system oxygen flux measurements were conducted and compared with a range of water and sediment parameters to explain drivers for low oxygen concentrations. A high percentage of oxygen demand at a whole pond scale was from the sediment; hence SOD drove low oxygen concentrations in the water column. SOD rates were significantly positively correlated with chlorophyll a concentrations in the water column. These findings suggested that algal production in the water column, rather than benthic algal production, or other organic loading, provided an organic carbon source driving SOD. Oxygen demand was much higher than oxygen production within the IRSPs, indicating high bacterial activity and low algal production. This study has shed new light

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The magnitude and significance of sediment oxygen demand in gravel spawning beds for the incubation of salmonid embryos

Sear

Pattison

Collins

et al. 2017

River Research & Apps

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Globally, salmon populations are under pressure and in those where numbers are severely depleted, density independent factors such as the accumulation of fine sediment and subsequent mortality of incubating embryos are critical factors in their conservation. Although progress has been made in identifying the processes by which fine sediment can lead to embryo mortality, this has focussed on the physical blockage of gravel pores. This paper presents new knowledge on the

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Monitoring sediment oxygen demand for assessment of dissolved oxygen distribution in river

Cited by 8 publications

References 24 publications

Seasonal Variation in Sediment Oxygen Demand in a Northern Chained River-Lake System

Seasonal Variation in Sediment Oxygen Demand in a Northern Chained River-Lake System

Factors driving low oxygen conditions in integrated rice-shrimp ponds

The magnitude and significance of sediment oxygen demand in gravel spawning beds for the incubation of salmonid embryos

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