Effects of vegetation cover on sediment particle size distribution and transport processes in natural rainfall conditions on post-fire hillslope plots in South Korea

Ewane, Ewane Basil; Lee, Heon-Ho

doi:10.1071/sr16117

Cited by 11 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A possible reason for such a trend is that NR1 and SR1 sites receive considerable amount of land-based run-off, which carries fine-grain sediments further downstream. In addition, location of these sampling sites with respect to the higher mangrove vegetation cover (density) has an influence on the grain size distribution pattern because it reduces the effect of erosion due to precipitation (Ewane and Heon 2016). …”

Section: Discussionmentioning

confidence: 99%

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Minu

Routh

Dario

et al. 2018

Environ Monit Assess

View full text Add to dashboard Cite

Spatial and temporal distribution of trace metals and their cycling is a key issue for understanding the ongoing biogeochemical processes in coastal environments. Sediment cores were collected from six different sampling locations from the Rufiji delta mangrove forests in southeastern coastal Tanzania that are perceived to be impacted by urban development and agricultural activities in the catchment, and pollution in upstream sections of the Rufiji River. The chronology and sediment accumulation rates at these sampling sites were derived based on the distribution of 210Pbexcess method. The trace metals (As, Cd, Cr, Cu, Ni, Pb, and Zn) were sequentially extracted as per the BCR method and analyzed. The results indicate that the mass accumulation rates range from 0.40 g cm−2 year−1 (cores NR3 and NR4) to 1.75 g cm−2 year−1 (core SR1). Trace metals in the cores are mainly associated with the residual phase and their abundances in sediments are ranked as Cr > Zn > Ni > Cu > Pb > Cd. The results imply that trace metals in the Rufiji delta mangroves are mainly of crustal origin, and they are less sensitive to weathering. Further, these metals are least available for uptake by plants and they pose limited threat to the biota.

show abstract

Section: Discussionmentioning

confidence: 99%

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Minu

Routh

Dario

et al. 2018

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

“…Correlations with I 30 were smaller, a result attributed to the rapid hydrologic response of the catchment. For urban flash flooding arising from catchments draining the hinterland of Genoa (Liguria, Italy), Faccini et al (2018) stressed the importance of rainfall intensities over periods of 1-3 h, while Papagiannaki et al (2015) in Greece showed that urban flash flooding was probable for I 10 > 22.8 mm h −1 (or I 60 > 9.6 mm h −1 ). For Italy, Esposito et al (2018) reported flash flood thresholds of I 10 > 54 mm h −1 or I 60 > 30 mm h −1 .…”

Section: What Evidence Points To the Significance Of Short-lived Intementioning

confidence: 99%

“…In addition to ponding, it is probable that other mechanisms at work at the soil surface are strongly activated during intensity bursts. The breakdown of soil aggregates prepares smaller, more readily transported particles, and this becomes more active with the higher kinetic energy expenditure at the soil surface associated with intensity bursts (Ewane and Lee, 2016). Additionally, air entrapment arises when drop bombardment of the soil surface forces air into the soil pore spaces.…”

Section: By What Mechanisms Do Intensity Bursts Influence Soil Surfacmentioning

confidence: 99%

Rainfall intensity bursts and the erosion of soils: an analysis highlighting the need for high temporal resolution rainfall data for research under current and future climates

Dunkerley

2019

Earth Surf. Dynam.

View full text Add to dashboard Cite

Abstract. Many land surface processes, including splash dislodgment and downslope transport of soil materials, are influenced strongly by short-lived peaks in rainfall intensity but are less well accounted for by longer-term average rates. Specifically, rainfall intensities reached over periods of 10–30 min appear to have more explanatory power than hourly or longer-period data. However, most analyses of rainfall, and particularly scenarios of possible future rainfall extremes under climate change, rely on hourly data. Using two Australian pluviograph records with 1 s resolution, one from an arid and one from a wet tropical climate, the nature of short-lived “intensity bursts” is analysed from the raw inter-tip times of the tipping bucket gauges. Hourly apparent rainfall intensities average just 1.43 mm h−1 at the wet tropical site and 2.12 mm h−1 at the arid site. At the wet tropical site, intensity bursts of extreme intensity occur frequently, those exceeding 30 mm h−1 occurring on average at intervals of <1 d and those of >60 mm h−1 occurring on average at intervals of <2 d. These bursts include falls of 13.2 mm in 4.4 min, the equivalent of 180 mm h−1, and 29 mm in 12.6 min, equivalent to 138 mm h−1. Intensity bursts at the arid site are much less frequent, those of 50–60 mm h−1 occurring at intervals of ∼1 month; moreover, the bursts have a much shorter duration. The aggregation of rainfall data to hourly level conceals the occurrence of many of these short-intensity bursts, which are potentially highly erosive. A short review examines some of the mechanisms through which intensity bursts affect infiltration, overland flow, and soil dislodgment. It is proposed that more attention to resolving these short-lived but important aspects of rainfall climatology is warranted, especially in light of possible changes in rainfall extremes under climate change.

show abstract

“…This was attributable to the fact that finer sediment particles were transported from the LB catchment than from the UF catchment because many substances including nutrients are preferentially associated with a finer fraction of the soil, which has a larger specific surface area [46]. Soil disturbances, such as landslides, break the structure of soil aggregates and thus the fine fraction would become enriched in the sediment particles transported from the landslide area during rain events [47][48][49]. Kyuka et al [50] reported that the SS yield accounted for approximately 90% of the total sediment yield in the downstream river of our study site, i.e., the Atsuma River.…”

Section: Discussionmentioning

confidence: 99%

Vegetation Effects on Phosphorus Runoff from Headwater Catchments in a Cool-Temperate Region with Landslides, Northern Japan

Ide,

Naito,

Arata

et al. 2024

Forests

View full text Add to dashboard Cite

Forest vegetation and soils in headwaters can control runoff and surface erosion. However, it remains unclear how vegetation affects nutrient exports from cool-temperate forest headwaters during intense rain events that transport sediment-associated nutrients, such as phosphorus (P). To clarify this, we targeted an upstream landslide area and analyzed P contents in surface soils and total P (TP) in stream water of the undisturbed (UF) and landslide-bearing forest (LB) catchments. The soil P content was higher in the UF catchment than in the LB catchment, but differences in the average TP concentration and load during low flows between these catchments were not significant. Conversely, the overall runoff and the TP load were three and ten times higher in the LB catchment than in the UF catchment, respectively, during a rain event with daily precipitation of 49 mm, despite the soil P content being much lower in the LB catchment. Particulate P (PP) accounted for more than 90% of the TP load during the rain event in the LB catchment, whereas dissolved P accounted for more than 80% of the TP load in the UF catchment. Therefore, soil surface mobility strongly affected P transport in the forest catchments. Our study suggests that vegetation not only reduces PP loads by controlling runoff, but also influences stream P forms in cool-temperate forests.

show abstract

Effects of vegetation cover on sediment particle size distribution and transport processes in natural rainfall conditions on post-fire hillslope plots in South Korea

Cited by 11 publications

References 38 publications

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Rainfall intensity bursts and the erosion of soils: an analysis highlighting the need for high temporal resolution rainfall data for research under current and future climates

Vegetation Effects on Phosphorus Runoff from Headwater Catchments in a Cool-Temperate Region with Landslides, Northern Japan

Contact Info

Product

Resources

About