Physical Habitat Modeling in Dalcheon Stream Using Fuzzy Logic

Jung, Sanghwa; Jang, Ji-Yeon; Choi, Sung-Uk

doi:10.3741/jkwra.2012.45.2.229

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Refs. [47][48][49][50][51][52][53] used multivariate methods, such as fuzzy approaches. In general, aquatic ecosystem data can be expressed numerically through fuzzy rules based on expert opinions.…”

Section: Discussionmentioning

confidence: 99%

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Design of Ecological Flow (E-Flow) Considering Watershed Status Using Watershed and Physical Habitat Models

Kim,

Lee,

Woo

et al. 2023

Water

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Ecological flow (E-flow) determination is an essential component of stream management and the preservation of aquatic ecosystems within a watershed. E-flow should be determined while considering the overall status of the watershed, including the hydrological cycle, hydraulic facility operation, and stream ecology. The purpose of this study is to determine E-flow by considering watershed status through coupled modeling with SWAT and PHABSIM. SWAT was calibrated to ensure reliability when coupling the two models, using observed data that included streamflow and dam inflows. The calibration result of SWAT showed that the averages of R2, NSE, and RMSE were 0.62, 0.57, and 1.68 mm/day, respectively, showing satisfactory results. Flow duration analysis using the SWAT results was performed to apply to discharge boundary conditions for PHABSIM. The averages of Q185 (mid-range flows) and Q275 (dry conditions) were suitable to simulate fish habitat. The habitat suitability index derived through a fish survey was applied to PHABSIM to estimate E-flow. E-flow was estimated at 20.0 m3/s using the coupled model and compared with the notified instream flow by the Ministry of Environment. The results demonstrate a high level of applicability for the coupled modeling approach between the watershed and physical habitat simulation models. Our attempt at coupled modeling can be utilized to determine E-flow considering the watershed status.

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Section: Discussionmentioning

confidence: 99%

“…Refs. [47,49] compared PHABSIM with other habitat simulation models, including River2D and CASiMiR, for urban and natural reach. The target reach here was longer than in our study.…”

Section: Discussionmentioning

confidence: 99%

Design of Ecological Flow (E-Flow) Considering Watershed Status Using Watershed and Physical Habitat Models

Kim,

Lee,

Woo

et al. 2023

Water

View full text Add to dashboard Cite

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Application of Habitat Suitability Models for Assessing Climate Change Effects on Fish Distribution

Shim¹,

Bae²,

Jung³

2016

Ecology and Resilient Infrastructure

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Temperature increase and precipitation changes caused by change alter aquatic environments including water quantity and quality that eventually affects the habitat of aquatic organisms. Such changes in habitat lead to changes in habitat suitability of the organisms, which eventually determines species distribution. Therefore, conventional habitat suitability models were investigated to evaluate habitat suitability changes of freshwater fish cause by change. Habitat suitability models can be divided into habitat-hydraulic (PHABSIM, CCHE2D, CASiMiR, RHABSIM, RHYHABSIM, and River2D) and habitat-physiologic (CLIMEX) models. Habitat-hydraulic models use hydraulic variables (velocity, depth, substrate) to assess habitat suitability, but lack the ability to evaluate the effect of water quality, including temperature. On the contrary, CLIMEX evaluates the physiological response against climatic variables, but lacks the ability to interpret the effects of physical habitat (hydraulic variables). A new concept of ecological habitat suitability modeling (EHSM) is proposed to overcome such limitations by combining the habitat-hydraulic model (PHABSIM) and the habitat-physiologic model (CLIMEX), which is able to evaluate the effect of more environmental variables than each conventional model. This model is expected to predict fish habitat suitability according to climate change more accurately.

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Estimation of Ecological Flow and Habitat Suitability Index at Jeonju-Cheon Upstream

Kim

Park²,

Kang³

et al. 2016

Journal of Korean Society of Environmental Engineers

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In this study, WUA (Weighted Usable Area) based on the Instream Flow Incremental Methodology (IFIM) was calculated to determine ecological flow at JeonJu-Cheon by using River2D model. To calibrate River2D, simulation results for low flow conditions of River2D were compared with calibrated HEC-RAS simulation results and the optimum parameters were determined. The results were RMSE (0.18), NSE (0.71) and coefficient of determination (0.78) for velocity and RMSE (0.02), NSE (0.71), coefficient of determination (0.73) for water depth. The result shows that the model successfully simulates the water flows. A selected target fish species to build the habitat suitability index were composed of Zaccoplatypus and Coreoleuciscus splendidus. These species showed the highest occurrences over the past decade in f ish monitoring. Also, The WUA-Discharge curve was calculated with the suitability index in a medium flow conditions. From the result, WUA is changed according to flowrate. In the flowrate-WUA/A graph, ecological flow can be determined at 1.8~2.0 m 3 /s for Zaccoplatypus 2.0 m 3 /s and Coreoleuciscus splendidus 1.8 m 3 /s at JeonJu-Cheon upstream. When compared with flow-duration analysis, it is demonstrative that simulation results fitted ecological flow considering quantity of available habitat for each fish species.

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Physical Habitat Modeling in Dalcheon Stream Using Fuzzy Logic

Cited by 3 publications

References 14 publications

Design of Ecological Flow (E-Flow) Considering Watershed Status Using Watershed and Physical Habitat Models

Design of Ecological Flow (E-Flow) Considering Watershed Status Using Watershed and Physical Habitat Models

Application of Habitat Suitability Models for Assessing Climate Change Effects on Fish Distribution

Estimation of Ecological Flow and Habitat Suitability Index at Jeonju-Cheon Upstream

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