Sediment Mobilization by Hurricane‐Driven Shallow Landsliding in a Wet Subtropical Watershed

Ramos‐Scharrón, Carlos E.; Arima, Eugênio; Guidry, Ashley; Ruffe, D.; Vest, B.

doi:10.1029/2020jf006054

Cited by 8 publications

(3 citation statements)

References 121 publications

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“…An analysis of the landslides triggered during Hurricane María within a 44 km 2 wet tropical watershed in western PR (i.e., the Lago Lucchetti Watershed) showed that about 77% of the sediment produced originated within 5 m of secondary access roads within both active and abandoned coffee farms (Ramos Scharrón et al, 2021). The close association between roads and landslides appears to be generally true throughout PR (fig.…”

Section: Road Effects On Landslidesmentioning

confidence: 96%

“…Assessing the contribution of landslides will require a longterm understanding of the magnitude-frequency relationship of landslide-triggering rainstorms for landscapes with a variety of susceptibilities to slope failure (Betts et al, 2017). Ongoing work suggests that sediment mobilization by landsliding is dependent on road densities regardless of whether the roads are actively used or abandoned (Ramos Scharrón et al, 2021;.…”

Section: Road Effects On Sediment Budgetsmentioning

confidence: 99%

See 1 more Smart Citation

Three Decades of Road and Trail Runoff and Erosion Work in the Northeastern Caribbean – a Research Program Perspective

Scharron¹,

Alicea²,

Sanchez³

et al. 2023

Journal of the ASABE

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Highlights The infiltration capacities of unsurfaced roadways are frequently exceeded by rain intensity, promoting overland flow. Erosion rates from unsurfaced roadways and cut slopes are 101 to 104 times greater than on undisturbed hillslopes. Roads in steep, subtropical wet terranes may increase landslide erosion by a factor of 5 relative to areas without roads. The hydro-geomorphic impact of roads is so prominent that they must be explicitly considered in watershed assessments. ABSTRACT. Erosion is a key environmental concern in the northeastern Caribbean because it can diminish soil productivity, damage infrastructure, and threaten human life. Additionally, sediment released by erosion can be delivered to streams where it can degrade water quality and aquatic habitat, reduce reservoir storage capacity, and threaten critical marine resources such as sea grass beds and coral reefs. Road erosion has been a concern in the region since the 1990s, and a considerable body of research has been conducted over the last ~30 years. This article reviews the key findings and identifies additional research needs. In some tropical dry coastal watersheds of the US Virgin Islands and Puerto Rico, unpaved roads and foot or off-road vehicle trails are the primary sediment sources. Watershed scale sediment production rates in these tropical dry settings are 0.3 to 3.7 Mg ha-1 yr-1, depending on unpaved road density, and these are 3 to 40 times greater than under undisturbed conditions. In wetter settings, like the forested and actively cultivated landscapes of highland Puerto Rico, sediment contributions include those from unpaved farm roads but also those from croplands, streambanks, and landslides. Watershed scale sediment production rates in actively cultivated tropical wet settings are 15 to 60 Mg ha-1 yr-1, with road-induced surface erosion and landslides accounting for 50% to 95% of total sediment production. Designing management alternatives will require additional research to improve our understanding of road-to-stream and road-to-coast connectivity, develop effectiveness metrics of applied management practices, and establish the specific causes of road-induced landslides. Keywords: Connectivity, Coral reefs, Landslides, Puerto Rico, Sedimentation, Surface erosion, Virgin Islands.

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Section: Road Effects On Landslidesmentioning

confidence: 96%

Section: Road Effects On Sediment Budgetsmentioning

confidence: 99%

Three Decades of Road and Trail Runoff and Erosion Work in the Northeastern Caribbean – a Research Program Perspective

Scharron¹,

Alicea²,

Sanchez³

et al. 2023

Journal of the ASABE

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show abstract

“…Particularly, the coastal environment of Florida is advantageous to tidal flat accretion, which makes this state an ideal place to implement the case study. First, Florida is the most hurricane-prone state in the US [36,37], and numerous studies [38][39][40][41][42][43][44] agree that hurricanes could bring in tremendous sediments along the coast. Second, over a half of the coastal wetlands in the conterminous US are distributed along the Gulf Coast [45].…”

Section: Study Areamentioning

confidence: 99%

The Spatiotemporal Characteristics and Dynamic Changes of Tidal Flats in Florida from 1984 to 2020

Liu

2021

Geographies

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Tidal flats are playing a critical role in the coastal environment, which mainly rely on satellite images to map the distribution on large spatiotemporal scales. Much effort has been made to monitor and analyze the spatiotemporal dynamics of tidal flats in order to provide worthwhile references for scientists and lawmakers. Instead of considering the dynamics of tidal flats only, this study implemented a series of comprehensive analyses on the tidal flats along the coast of Florida during the period 1984–2020. First, the analyses on the pixel level examined the spatiotemporal characteristics of tidal flat dynamics and the interactions with lands and permanent water. Second, the contiguous pixels of tidal flats were assembled as objects, and two geometric attributes were calculated and used to track the temporal patterns of tidal flat dynamics on this level. Finally, the Mann–Kendall test and Sen’s slope estimator were applied to identify and quantify the significant trends of tidal flat dynamics on the two levels. The results highlighted the differences in tidal flat distributions and dynamics between the Gulf Coast and Atlantic Coast, which further verified effective GIS representations and analyses that could be applied to other coastal studies.

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Road cutslope erosion and control treatments in an actively-cultivated tropical montane setting

Ramos‐Scharrón

Alicea-Díaz

Figueroa-Sánchez

et al. 2022

CATENA

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Sediment Mobilization by Hurricane‐Driven Shallow Landsliding in a Wet Subtropical Watershed

Abstract: Introduction Sediment Releases Associated With Tropical CyclonesWatershed-scale sediment delivery is the combined result of sediment release from hillslopes, hillslopeto-stream connectivity, and the transport and storage capacity of the fluvial system (

Cited by 8 publications

References 121 publications

Three Decades of Road and Trail Runoff and Erosion Work in the Northeastern Caribbean – a Research Program Perspective

Three Decades of Road and Trail Runoff and Erosion Work in the Northeastern Caribbean – a Research Program Perspective

The Spatiotemporal Characteristics and Dynamic Changes of Tidal Flats in Florida from 1984 to 2020

Road cutslope erosion and control treatments in an actively-cultivated tropical montane setting

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