Study of quality maintenance of fish habitats in small- and medium-sized mountain rivers with low flow rate

Zhu, Zaixiang; Li, Yong; Li, Kefeng; Cheng, Bi-Xin; Yang, Shaorong; Li, Qingyuan; Qing, Jie; Zhang, Baichuan; Yan, Xiaojuan; Liang, Ruifeng

doi:10.1016/j.ecoleng.2020.105780

Cited by 15 publications

(6 citation statements)

References 14 publications

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“…It further discusses how to develop and manage river ecological restoration measures to more comprehensively maintain river fish habitat quality at a high level in small and medium mountainous rivers. Compared with our previous research results in the Heishui River [ 23 , 40 ], this study is a continuation and extension of the research on the impact of external environmental changes on fish. The research results can provide theoretical support for the environmental impact assessment and adaptive management of subsequent river restoration projects.…”

Section: Introductionmentioning

confidence: 59%

“…The Sichuan provincial government has listed S. prenanti as a priority protected species. Considering the economic status and degree of endangerment of S. prenanti in the Heishui River, this study selected S. prenanti as the target fish [ 40 , 44 ]. S. prenanti is a typical plateau fish species that mainly lives in mountainous rivers with fast flow velocity and high oxygen content and exhibits short-distance reproductive migration.…”

Section: Methodsmentioning

confidence: 99%

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Impact of Low-Head Dam Removal on River Morphology and Habitat Suitability in Mountainous Rivers

Zhu²,

et al. 2022

IJERPH

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Dam removal is considered an effective measure to solve the adverse ecological effects caused by dam construction and has started to be considered in China. The sediment migration and habitat restoration of river ecosystems after dam removal have been extensively studied abroad but are still in the exploratory stage in China. However, there are few studies on the ecological response of fishes at different growth stages. Considering the different habitat preferences of Schizothorax prenanti (S. prenanti) in the spawning and juvenile periods, this study coupled field survey data and a two-dimensional hydrodynamic model to explore the changes in river morphology at different scales and the impact of changes in hydrodynamic conditions on fish habitat suitability in the short term. The results show that after the dam is removed, in the upstream of the dam, the riverbed is eroded and cut down and the riverbed material coarsens. With the increase in flow velocity and the decrease in flow area, the weighted usable area (WUA) in the spawning and juvenile periods decreases by 5.52% and 16.36%, respectively. In the downstream of the dam, the riverbed is markedly silted and the bottom material becomes fine. With the increase in water depth and flow velocity, the WUA increases by 79.91% in the spawning period and decreases by 67.90% in the juvenile period, which is conducive to adult fish spawning but not to juvenile fish growth. The changes in physical habitat structure over a short time period caused by dam removal have different effects on different fish development periods, which are not all positive. The restoration of stream continuity increases adult fish spawning potential while limiting juvenile growth. Thus, although fish can spawn successfully, self-recruitment of fish stocks can still be affected if juvenile fish do not grow successfully. This study provides a research basis for habitat assessment after dam removal and a new perspective for the subsequent adaptive management strategy of the project.

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Section: Introductionmentioning

confidence: 59%

Section: Methodsmentioning

confidence: 99%

Impact of Low-Head Dam Removal on River Morphology and Habitat Suitability in Mountainous Rivers

Zhu²,

et al. 2022

IJERPH

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“…A Cutter Suction Dredge (CSD) consists of a pontoon with a large pump and a long suction pipe. Dredging machinery cuts and pumps up material sediment dumped in a particular place [21]. A standard suction dredger can only transport loose material, but a CSD can break up hard or compacted dirt so that it can be sucked up and pushed by pumping by employing a cutter head [22].…”

Section: Introductionmentioning

confidence: 99%

Discharging Sediment Downstream: The Opportunities and Challenges of Sediment Management in Sutami Reservoir, Indonesia

Sisinggih¹,

Wang²,

Juwono³

et al. 2023

IJSDP

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There is no flushing outlet facility and limited disposal sites for dredged material sediment in Sutami Reservoir. One preferable alternative to evacuate the sediment is directly downstream discharging dredged material. New research into such dredging techniques is therefore essential. This research focused on the technical opportunities and challenges of downstream discharging sediment from Sutami Reservoir. In addition, the HEC-RAS model was used to look at the impacts on the river downstream of the dam. Results showed that 400,000 m 3 should be dredged at two sites (Dempok and Sumberpetung), extended the pipeline to release the slurry material downstream, and two booster pumps installed to maximize dredging productivity. There were no significant impacts on the riverbed alteration downstream of the dam. The slurry material flowed and deposited in Wlingi Dam and could be flushed periodically to avoid excess deposits. There were opportunities to save the cost of disposal area and support the replenishment of sediment. Meanwhile, the challenges were the need to monitor the environmental issues related to water quality downstream, cost investment, and water loss, which cannot re-enter the storage as conventional dredging. Finally, discharging sediment downstream was technically feasible and the best solution for sediment management in Sutami Reservoir.

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“…At present, habitat quality can be assessed based on the measured species diversity, or through the analysis of the evolution of the habitat by parameter substitution (Andrus et al, 2021). As the parameter substitution method has become the main method, the relationship between resources and habitat suitable land is mainly discussed from the perspective of landscape pattern (Zhu Z. et al, 2020). Generally, it is believed that construction land, cultivated land and roads are the main sources of threats to habitat quality, while natural ecosystems provide a relatively complete habitat for species, and their habitat quality is overall good (Zhang H. et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Responses of Habitat Quality and Animal Biodiversity to Grazing Activities on the Qinghai-Tibet Plateau

Liu

Wang

et al. 2021

Front. Ecol. Evol.

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Grazing activities perhaps lead to habitat quality degradation and animal biodiversity loss while the effects on the Qinghai-Tibet Plateau (QTP) is still relatively poorly studied. Based on the Integrated Valuation of Ecosystem Services and Tradeoffs model, geographical detector model and generalized linear mixed model, the responses of habitat quality and animal biodiversity to grazing activities at 5 km grid scale were analyzed. Results showed that the overall habitat quality on the QTP was high with 76.43% of the total area, and poor level accounted for 19.56%. High level habitat was mainly distributed in the southern part, while the poor level in the northern part. The mean grazing activity explanatory ability to habitat quality, bird species richness and mammal richness were 0.346, 0.430, and 0.354. The interaction effects between slope and grazing activities on habitat quality, bird species richness and mammal richness were the most important interaction effects, and the area affected by the interaction was 73.82, 46.00, and 46.17% of habitat quality, bird species richness and mammal richness, respectively. The interaction effects on habitat quality, bird species richness and mammal richness all showed “low in the northwest and high in the southeast”. Grazing activities and habitat quality had a positive correlation while bird species richness, and mammal richness negative correlations. The spatial relationship of grazing activities of habitat quality was “higher in the middle and lower around the periphery”, while the spatial distribution of grazing activities of bird species richness and mammal richness was “higher in the east and lower in the west”. This study explicitly revealed the responses of habitat quality and animal biodiversity to grazing activities, thus providing references for biodiversity conservation on the QTP.

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Study of quality maintenance of fish habitats in small- and medium-sized mountain rivers with low flow rate

Cited by 15 publications

References 14 publications

Impact of Low-Head Dam Removal on River Morphology and Habitat Suitability in Mountainous Rivers

Impact of Low-Head Dam Removal on River Morphology and Habitat Suitability in Mountainous Rivers

Discharging Sediment Downstream: The Opportunities and Challenges of Sediment Management in Sutami Reservoir, Indonesia

Responses of Habitat Quality and Animal Biodiversity to Grazing Activities on the Qinghai-Tibet Plateau

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