Hydrologic, geomorphic, and stratigraphic controls on suspended sediment transport dynamics, Big Harris Creek restoration site, North Carolina, USA

Miller, Jerry R.; Ferri, Kelly; Grow, David; Villarroel, Lionel F.

doi:10.1016/j.ancene.2018.12.002

Cited by 6 publications

(13 citation statements)

References 23 publications

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“…In the stabilization period, SSC roses from 6 mg/L at baseflow to a peak of only 918 mg/L in the 15 October 2018 storm (the highest SSC recorded in 2017-2018) for a runoff coefficient (8%) similar to that recorded in the 02 November 2011 event. In most storm events, peak SSC was linked with peak discharge (e.g., 19 April 2011 and 02 November 2011), even in storms after the summer (e.g., [15][16] October 2018) ( Figure 7). In ESAC, significant correlations were found between peak SSC and peak discharge and I 15 during both the urbanization (r = 0.63, p < 0.05 and r = 0.82, p < 0.01, respectively) and stabilization (r = 0.78, p < 0.01 and r = 0.69, p < 0.05, respectively) periods.…”

Section: Inter-and Intra-storm Variations In Sscmentioning

confidence: 99%

“…In USA, pollution associated with sediment load is the most prevalent cause of impairment of aquatic systems [14]. In North America, the annual cost of suspended sediment influx to riverine ecosystems is estimated to range from $20 to $50 billion [15].Understanding sediment dynamics is necessary to develop management strategies required to mitigate the impacts on the ecological status of the aquatic systems [4,16]. It is well-established that fluvial sediment loads and dynamics are affected by a combination of geological, lithological, topographical, climatic and land cover features of the catchments [6,17,18], as well as human activities, such as urbanization, mining and river regulation [19,20].…”

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Impact of Land-Use Changes on Spatiotemporal Suspended Sediment Dynamics within a Peri-Urban Catchment

Ferreira

Walsh

Kalantari

et al. 2020

Water

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Understanding sediment dynamics in peri-urban catchments constitutes a research challenge because of the spatiotemporal complexity and variability of land-uses involved. This study investigates differences in the concentration of total sediments (TSC) and suspended sediments (SSC) in the small peri-urban Mediterranean Ribeira dos Covões catchment (40% urban area) in central Portugal. Suspended sediment responses at the catchment outlet (E) and in three upstream sub-catchments, during periods of urbanization (2011–2013) and stabilizing land-use (2017–2018) are compared for storm-event datasets encompassing similar ranges of rainstorm sizes and antecedent rainfall condition. The Quinta sub-catchment, with the lowest urban area (22%) but subject to major construction activities affecting 17% of its area, led to highest TSC and SSC during urbanization (attaining 4320 mg/L and 4184 mg/L, respectively), and a median reduction of 38% and 69%, respectively, during stabilization. Espírito Santo sub-catchment, with highest urban area (49%) and minor construction activities, displayed similar median TSC in both periods (258–240 mg/L) but highest SSC reduction (76%), highlighting the impact of the anthropogenic disturbance mainly on fine-particle sediments and a good connectivity with the stream. Porto Bordalo sub-catchment, with 39% urban area and subject to the construction of a four-line road covering 1.5% of its area, showed the lowest TSC and SSC concentrations and the lowest median reductions in both periods (31% and 64%, correspondingly), mainly because of the impact of an unplanned retention basin established with soil from the construction site. Overall, median TSC and SSC reduced 14% and 59% at E, from urbanization to stabilization. Information about sediment dynamics should guide stakeholders in establishing strategies to reduce sediment loads and mitigate the impacts on urban aquatic ecosystems.

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Section: Inter-and Intra-storm Variations In Sscmentioning

confidence: 99%

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Impact of Land-Use Changes on Spatiotemporal Suspended Sediment Dynamics within a Peri-Urban Catchment

Ferreira

Walsh

Kalantari

et al. 2020

Water

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“…Recent studies have shown that such ADEs not only represent an interesting topic of academic analysis, but are of importance to river restoration and contemporary water quality conditions, among a host of other areas of resource management [15]. For example, it is now widely accepted that contemporary sediment loads (and water quality in general) can be significantly influenced by the influx of legacy sediments (and their associated contaminants) to the channel system [21][22][23][24][25]. What is less widely recognized is how historical geomorphic events, and the stratigraphic deposits produced, can impact contemporary channel processes, form, and restoration [20,26,27].…”

Section: Introductionmentioning

confidence: 99%

Influence of Historical Land-Use Change on Contemporary Channel Processes, Form, and Restoration

2021

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Big Harris Creek, North Carolina, possesses a geomorphic history similar to many drainages in the southern Appalachian piedmont, and was used herein as a representative example of the influence of European settlement on contemporary channel form and processes. The integrated use of historical, dendrogeomorphic, stratigraphic, and cartographic data shows that the conversion of land-cover from a mix of natural conditions and small farms to commercial cotton production in the late 1800s and early 1900s led to significant upland soil erosion, gully formation, and the deposition of legacy sediments on the valley floor. Aggradation was followed by catchment-wide channel incision in the mid-1900s in response to reforestation and the implementation of soil conservation measures. Collectively, the responses form an aggradational-degradational episode (ADE) that produced the geomorphic framework for the contemporary processes operating along the drainage network. Defined, characterized, and mapped process zones (stream reaches of similar form and process) show that the type, intensity, and evolutionary sequence of geomorphic responses varied within the catchment as a function of the position along the drainage network, the erosional resistance of the underlying bedrock, and the valley characteristics (particularly width). Understanding the spatially variable influences of the ADE on contemporary, reach-scale geomorphic processes provides valuable insights for restoration as it helps inform practitioners of the sensitivity and ways in which the reach is likely to respond to future disturbances, the potential impacts of processes on proposed manipulations intended to achieve the project’s restoration goals, and the potential risk(s) involved with channel reconstruction. The latter is strongly controlled by geotechnical differences between erosionally resistant precolonial deposits and easily eroded legacy sediments that locally form the channel banks following the ADE.

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“…al., 2017;McAdoo et al, 2018). Mega-gully and landslide hazards are increasing at a time of rapid urbanization as a result of limited oversight of planning and construction as well as socio-economic pressures that force populations to settle in highhazard areas (Hardoy et al, 2013;Retief et al, 2016;Miller et al, 2019). Moreover, mass movement hazards are concentrated in developing middle-and low-income regions of the world where unregulated settlement occurs on steep slopes (Anderson et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Rapid assessment of urban mega-gully and landslide events with Structure-from-Motion techniques validates link to water resources infrastructure failures

Gudino‐Elizondo

Brand

Biggs

et al. 2021

Preprint

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Abstract. Mega-gullies and landslides pose significant hazards to urban development on steep terrain. Water resources infrastructure failures (WRIFs), such as leaks and breaks in water supply pipes, have been postulated as a trigger of mass movement events but data for validation has been challenging to acquire since earthwork proceeds quickly after events to repair roads and other infrastructure. Urban development in Tijuana, Mexico was monitored for a five-year period to document the occurrence of mega-gullies and landslides, including sediment volumes. A rapid assessment approach was developed based on photogrammetric observations from an unmanned aerial vehicle (UAV) and Structure from Motion (SfM) digital processing. Three hazardous mass-movement events were observed including two mega-gullies and one landslide. Furthermore, all three events were linked to WRIFs. Frequency analysis points to the annual probability of a WRIF-based erosion event in the range of 40–60 %, which is far higher than design levels typically used for urban stormwater infrastructure (5–10 %). Additionally, sediment modelling points to WRIF-based erosion as a non-negligible contributor to sediment generation. These results suggest that WRIFs are a significant contributor to erosion hazards facing urban development on steep terrain, and call for expanded monitoring to characterize the occurrence and modes of WRIF-based erosion events.

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Hydrologic, geomorphic, and stratigraphic controls on suspended sediment transport dynamics, Big Harris Creek restoration site, North Carolina, USA

Cited by 6 publications

References 23 publications

Impact of Land-Use Changes on Spatiotemporal Suspended Sediment Dynamics within a Peri-Urban Catchment

Impact of Land-Use Changes on Spatiotemporal Suspended Sediment Dynamics within a Peri-Urban Catchment

Influence of Historical Land-Use Change on Contemporary Channel Processes, Form, and Restoration

Rapid assessment of urban mega-gully and landslide events with Structure-from-Motion techniques validates link to water resources infrastructure failures

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