Assessment of Dissolved Oxygen Mitigation at Hydropower Dams Using an Integrated Hydrodynamic/Water Quality/Fish Growth Model

Bevelhimer, Mark S.; Coutant, Charles

doi:10.2172/934797

Cited by 6 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The high mean concentrations of DO recorded at the lower sites (sites 4 -6) could be due to the self puri cation of the water along the course of the river. The absence of statistically signi cant difference in the DO levels among sites at 95% con dence level (Table 2) might be that the river owing down its course creates turbulence, which favors the dissolution of atmospheric oxygen [57]. The mean values of the present study varied within a narrower range compared with those reported previously by Degefu et al [50] and Eliku and Leta [58] for Awash River (3.62 -7.58 mg/L).…”

Section: Physico-chemical Parameterscontrasting

confidence: 60%

Distribution and Diversity of Macrophytes in Relation to Some Physico-Chemical Factors in the Ketar River, Ziway Catchment, Ethiopia

Chibsa

Mengistou

Kifle

2021

Preprint

View full text Add to dashboard Cite

Distribution and diversity of macrophytes in relation to some physico-chemical factors in the Ketar River were studied from December, 2017 to November, 2018. Physico-chemical parameters and macrophytes were collected from three stations along the river for eight months. Onsite measurements and laboratory work of physico-chemical was analyzed as recommended by APHA [31]. Macrophytes were collected manually using belt transect method. Except for pH and surface water temperatures, all the physico-chemical parameters measured showed no significant difference spatially. During the study period, sixteen macrophyte species belonged to fourteen families were identified. Among the identified macrophyte, 11 of them were emergent, while 3 were rooted with floating leaves and 2 free-floating. Free-floating macrophytes were shared the highest abundance followed by emergent. This research observed that the site (site 3) that was exposed to minimal human impact was rich in diversity and abundance of macrophytes. All the sites were dominated by emergent macrophytes that attained the highest relative frequency followed by rooted emergent species. Azolla nilotica and Pistia stratiotes were shared the highest abundance and were the dominant macrophyte with the relative frequency of 7.24% and density of 40.91%, and 7.93% and 26.54%, respectively. Under a favorable environment, nutrient loading from nearby creates more favorable conditions for the infestation of the invasive species (A. nilotica and P. stratiotes) to flourish and out-compete the other species of macrophyte. Therefore, anthropogenic activities that enhance nutrient addition to the River should be regulated.

show abstract

Section: Physico-chemical Parameterscontrasting

confidence: 60%

Distribution and Diversity of Macrophytes in Relation to Some Physico-Chemical Factors in the Ketar River, Ziway Catchment, Ethiopia

Chibsa

Mengistou

Kifle

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…This is due to the increased residence time (lower flow velocity) of the water, resulting in lower turbidity and much higher transparency (Tanos et al, 2011 ). Therefore, the dam-tailwater will have low dissolved oxygen, not because of the dam itself, but because of the ecological dynamics of the reservoir upstream of the dam (Bevelhimer and Coutant, 2006). This is generally the case in the absence of sustained photosynthetic oxygen production, because the wasteassimilating capacities of headwater ponds are often much lower than those of free-flowing upstream reaches (Butts and Evans, 1978).…”

Section: Study Areamentioning

confidence: 99%

Estimation of dissolved oxygen in riverine ecosystems: Comparison of differently optimized neural networks

Csábrági

Molnár

Tanos

et al. 2019

Ecological Engineering

View full text Add to dashboard Cite

“…The main objective of this study was to demonstrate a modeling approach that integrates the effects of flow and water quality dynamics with fish bioenergetics to predict DO mitigation effectiveness over long river segments downstream of hydropower dams (Bevelhimer and Coutant, 2006). We were particularly interested in demonstrating the incremental value of including a fish growth model as a measure of biological response.…”

Section: Water Quality Modelingmentioning

confidence: 99%

DOE Hydropower Program Biennial Report for FY 2005-2006

Salé

Cada

Acker

et al. 2006

View full text Add to dashboard Cite

Assessment of Dissolved Oxygen Mitigation at Hydropower Dams Using an Integrated Hydrodynamic/Water Quality/Fish Growth Model

Cited by 6 publications

References 9 publications

Distribution and Diversity of Macrophytes in Relation to Some Physico-Chemical Factors in the Ketar River, Ziway Catchment, Ethiopia

Distribution and Diversity of Macrophytes in Relation to Some Physico-Chemical Factors in the Ketar River, Ziway Catchment, Ethiopia

Estimation of dissolved oxygen in riverine ecosystems: Comparison of differently optimized neural networks

DOE Hydropower Program Biennial Report for FY 2005-2006

Contact Info

Product

Resources

About