Effects of removing Good Hope Mill Dam on selected physical, chemical, and biological characteristics of Conodoguinet Creek, Cumberland County, Pennsylvania

Chaplin, Jeffrey J.; Brightbill, Robin A.; Bilger, Michael D.

doi:10.3133/sir20055226

Cited by 5 publications

(8 citation statements)

References 10 publications

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“…Kil et al (2007) also showed similar changes of benthic macroinvertebrate communities in the middle site of a Korean stream. Stanley et al (2002) and Chaplin et al (2005) stated that, after dam removal, the reservoir in the upper stream shifted to a lotic habitat within 1 year to exhibit similarities with the community assemblage of a freeflowing reach. Kil et al (2007) also demonstrated that the lentic fauna and communities of benthic macroinvertebrates in the upper reservoir site changed fundamentally to lotic ones in the lower site 1 year after the complete removal (including foundation) of a small dam in a Korean stream.…”

Section: Discussionmentioning

confidence: 99%

Effects of low-head dam removal on benthic macroinvertebrate communities in a Korean stream

Kil

Bae

2012

Animal Cells and Systems

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This study was conducted to examine how a low-head dam removal (partial removal) could affect benthic macroinvertebrate communities in a stream. Benthic macroinvertebrates and substrates were seasonally sampled before and after dam removal (March 2006ÁApril 2007. Benthic macroinvertebrates and substrates were quantitatively sampled from immediately upstream (upper: pool) and downstream (lower: riffle) sites, the location of the dam itself (middle), and immediately above the impoundment (control: riffle). After the removal, species richness and density of benthic macroinvertebrates as well as the EPT group (Ephemeroptera, Plecoptera and Trichoptera) increased to higher levels than those before the removal, while functional feeding groups and habitat orientation groups changed more heterogeneously at the upper site. At the lower site, species richness and density decreased somewhat immediately after dam removal, which was associated with an increase of silt and sand, but recovered after monsoon floods which helped to enhance substrate diversity at the upper site. Decreased dominance index and increased diversity index in both the upper and lower sites are evidence of positive effects from the dam removal. In conclusion, we suggest that even a partial removal of a dam, resulting in increased substrate diversity in the upper site, could sufficiently help rehabilitate lost ecological integrity of streams without major habitat changes.

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Section: Discussionmentioning

confidence: 99%

Effects of low-head dam removal on benthic macroinvertebrate communities in a Korean stream

Kil

Bae

2012

Animal Cells and Systems

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“…An additional nutrient study of the Koshkonong River, Wisconsin by Doyle et al (2003b) demonstrated the retention of phosphorus (P) in the impoundment prior to removal, and modeled how changes in discharge altered P concentration, namely lower concentrations were predicted for lower discharge. In a study of Conodoguinet Creek in Pennsylvania, continuous measurements were taken of diurnal fluctuations in temperature, dissolved oxygen, pH, and specific conductance (Chaplin et al 2005). These data demonstrated that dam removal allowed a rapid return of the diurnal pattern within the previous impoundment zone.…”

Section: Chemical Changes and Water Quality Response To Dam Removalmentioning

confidence: 97%

“…Table 7 describes observed patterns of post-dam channel formation including work conducted using a channel evolution framework, as well as work based on changes in key geomorphological traits (stream width, bank slope, stream velocity, sediment particle size and spatial distribution). Observations demonstrated that sediment composition determined channel dynamics with lower sediment transport observed in systems dominated by coarse (Burroughs et al 2009;Cheng and Granata 2007) or non-erodible (Chaplin et al 2005) bed material, and, therefore, suggesting that headcut migration does not occur in all systems. As expected, discharge impacts sediment transport, with lowflow periods corresponding to low transport observations (Chaplin et al 2005) and high-flow periods concurrent with high transport observations .…”

Section: Channel Formationmentioning

confidence: 98%

“…Observations demonstrated that sediment composition determined channel dynamics with lower sediment transport observed in systems dominated by coarse (Burroughs et al 2009;Cheng and Granata 2007) or non-erodible (Chaplin et al 2005) bed material, and, therefore, suggesting that headcut migration does not occur in all systems. As expected, discharge impacts sediment transport, with lowflow periods corresponding to low transport observations (Chaplin et al 2005) and high-flow periods concurrent with high transport observations . In a study of the IVEX Dam failure on the Chagrin River, Ohio, Evans (2007) found the system followed the predictions of the channel evolution framework, with the exception of the aggradation and widening phase.…”

Section: Channel Formationmentioning

confidence: 98%

“…Undocumented infrastructure is likely to cause unexpected sediment erosion and transport dynamics when historic small dams breach or are removed. See references for study details: Burroughs et al (2009, Chaplin et al (2005), Cheng and Granata (2007), Doyle et al (2005), Rumschlag and Peck (2007), Wildman and MacBroom (2005) Tools for predicting channel evolution Predicting channel evolution is a critical step in understanding the risk from dam removal. Estimating sediment volume movement is important for understanding how post-dam hydrology will influence sediment transport potential, which determines contamination potential, changes to stream habitat, and sediment buildup near stream infrastructure such as water intakes.…”

Section: Channel Formationmentioning

confidence: 99%

See 2 more Smart Citations

Planning and implementing small dam removals: lessons learned from dam removals across the eastern United States

Tonitto

Riha

2016

Sustain. Water Resour. Manag.

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We review and build on a growing literature assessing small dam removal outcomes to inform future dam removal planning. Small dams that have exceeded their expected duration of operation and are no longer being maintained are at risk of breach. The past two decades have seen a number of small dam removals, though many removals remain unstudied and poorly documented. We summarize socio-economic and biophysical lessons learned during the past two decades of accelerated activity regarding small dam removals throughout the United States. We present frameworks for planning and implementing removals developed by interdisciplinary engagement. Toward the goal of achieving thorough dam removal planning, we present outcomes from well-documented small dam removals covering ecological, chemical, and physical change in rivers post-dam removal, including field observation and modeling methodologies. Guiding principles of a dam removal process should include: (1) stakeholder engagement to navigate the complexity of watershed landuse, (2) an impacts assessment to inform the planning process, (3) pre-and post-dam removal observations of ecological, chemical and physical properties, (4) the expectation that there are short-and long-term ecological dynamics with population recovery depending on whether dam impacts were largely related to dispersion or to habitat destruction, (5) an expectation that changes in watershed chemistry are dependent on sediment type, sediment transport and watershed landuse, and 6) rigorous assessment of physical changes resulting from dam removal, understanding that alteration in hydrologic flows, sediment transport, and channel evolution will shape ecological and chemical dynamics, and shape how stakeholders engage with the watershed.

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Responses of macroinvertebrate communities to small dam removals: Implications for bioassessment and restoration

Carlson

Donadi

Sandin

2018

Journal of Applied Ecology

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Small dam removals are increasing on a global scale; yet, general predictions of organism response to dam removal are constrained by heterogeneity of study designs, implementation strategies, geographies, and characteristics of dams and their removals. Macroinvertebrate data extracted from 29 studies including 34 small dam removals over a broad geographical range were re‐analysed utilizing dam removal effect sizes (a quantified change from before to after removal). Effect sizes of 10 metrics of community structure were calculated to investigate the spatiotemporal extent of small dam removal effects and if responses differ with characteristics of the dam and environmental settings. We found that dam removal had initial negative effects on total macroinvertebrate density and Ephemeroptera, Plecoptera and Trichoptera (EPT) density, both downstream and upstream; however, recovery to pre‐removal values was reached and exceeded after c. 15–20 months. Mean annual discharge, land use in the catchment and distance from the dam affected the magnitude and direction of responses of four community metrics: total density, EPT density, %EPT density and family biotic index. Synthesis and applications. Our study provides evidence that macroinvertebrate community recovery from dam removal is mediated by catchment characteristics and system size, which may correlate with sediment flushing efficiency. Negative impacts were observed in smaller systems or those with a high percentage of undisturbed catchment areas, conditions that may benefit from sediment management prior to dam removal. Significant responses in reaches upstream of the impoundment clearly indicate that caution be applied to interpretations of response in sampling designs that utilize upstream sites for reference condition.

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Effects of removing Good Hope Mill Dam on selected physical, chemical, and biological characteristics of Conodoguinet Creek, Cumberland County, Pennsylvania

Cited by 5 publications

References 10 publications

Effects of low-head dam removal on benthic macroinvertebrate communities in a Korean stream

Effects of low-head dam removal on benthic macroinvertebrate communities in a Korean stream

Planning and implementing small dam removals: lessons learned from dam removals across the eastern United States

Responses of macroinvertebrate communities to small dam removals: Implications for bioassessment and restoration

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