Estimation of least ecological streamflow through long-term habitat evaluation using stream hydrodynamics and water quality factors

Park, Jin-Seok; Jang, Seongju; Hong, Rokgi; Song, Inhong

doi:10.1080/02626667.2023.2241582

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…Precipitation decreased the effectiveness of the slope in influencing baseflows because of increased runoff and reduced infiltration with higher precipitation. Castelltort, Simpson, and Darrioulat [45] also observed a decrease in baseflow with increased slope.…”

Section: Marginal Influence Of Landscape Variablesmentioning

confidence: 82%

“…Steeper slopes can cause narrower and deeper stream basins with near-parallel rills, while flatter surfaces produce wider basins [29]. The resulting high water velocity in high-slope areas can also cause more damage to streams when there is a lack of stream roughness through large woody debris and boulders that provide microhabitats for aquatic ecosystems [14,45], a typical result of deforestation.…”

Section: Discussionmentioning

confidence: 99%

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Modeling Landscape Influence on Stream Baseflows for Watershed Conservation

Randhir,

Klosterman

2024

Land

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Instream flows are vital to the ecology of riverine and riparian systems. The influence of watershed characteristics on these systems is helpful in developing landscape policies to maintain these flows. Watershed characteristics like precipitation, forest cover, impervious cover, soil drainage, and slope affect baseflows. Spatial analysis using GIS and nonlinear regression analysis is used to analyze spatial and temporal information from gauged watersheds in Massachusetts to quantify the relationship between baseflows and watershed metrics. The marginal functions of landscape factors that reflect changes in baseflow are quantified. This information is then applied to watershed policy toward improving base flows. The interactions of three fixed attributes, soil drainage, rainfall incidence, and slope, are analyzed for the manageable landscape attributes of impervious and forest cover. Developing watershed policy to protect baseflows involves evaluating the complex interactions and functional relationships between these landscape factors and their use in watershed conservation planning.

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Section: Marginal Influence Of Landscape Variablesmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Modeling Landscape Influence on Stream Baseflows for Watershed Conservation

Randhir,

Klosterman

2024

Land

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“…When the threshold meets the habitat limitation points, the the continuity of the habitat is disrupted, and this is depicted as a significant gap appearing as an anomaly in the CAT diagram. Please refer to the Park et al [53] for more detailed CAT methodology. Based on the anomaly, we detected the specific thresholds that disrupt the continuity of the habitat and propose the least ecological streamflow which could sustain the stream WUA/WUAmax above the anomaly threshold.…”

Section: Continuous Above Threshold Analysis (Cat)mentioning

confidence: 99%

Evaluation of fish habitat suitability based on stream hydrodynamics and water quality using SWAT and HEC-RAS linked models

Park,

Jang,

Lee

et al. 2024

Preprint

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The objective of this study was to evaluate fish habitat suitability by simulating hydrodynamic and water quality factors using integration model of SWAT and HEC-RAS models considering time-series analysis. The 2.9 km reach of the Bokha stream was selected for the habitat evaluation of Zacco platypus, a dominant fish species of the stream reach. Streamflow and water quality at stream inlet were simulated with the SWAT model and subsequent cross-sectional stream velocity and water depth along with water temperature and dissolved oxygen (DO) were estimated using the HEC-RAS. The linked model was calibrated and validated for the 10 years period from 2013 to 2022. The aquatic habitat was assessed using the weighted usable area (WUA) and time-series analysis was conducted considering the continuity of stream habitat. Overall, SWAT and HEC-RAS simulation accuracy were evaluated as satisfactory or higher in all habitat influence indicators. High water temperature appeared to be the most influential habitat indicator of which impact was particularly pronounced in shallow streamflow areas during hot summer seasons. The time-series analysis identified a 28% threshold of WUA/WUAmax, equivalent to a streamflow of 0.48 m³/s, as the minimum ecological streamflow to mitigate the impact of water temperature rise. The proposed method by linking watershed-stream models could serve as a useful tool for ecological stream management.

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