Method of mitigating the surface erosion of a high-gradient mudstone slope in southwest Taiwan

Lee, Der-Her; Chen, Po Ying; Wu, Jiunn-Liang; Chen, Huiling; Yang, Yi

doi:10.1007/s10064-013-0518-z

Cited by 20 publications

(8 citation statements)

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“…These badlands feature a series of ridges and gullies and are found throughout other arid or semiarid areas, including North America (Kasanin‐Grubin & Bryan, ), southern Italy (Clarke & Rendell, ), and northern Spain (Desir & Marín, ). The badlands in southwestern Taiwan are formed from marine sedimentary rock (Lee, Chen, Wu, & Yang., ) and cover more than 1,000 km 2 . This area, often called a ‘Moonscape World,’ is representative of badlands in other parts of Monsoon East Asia.…”

Section: Introductionmentioning

confidence: 99%

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The influences of thorny bamboo growth on the bacterial community in badland soils of southwestern Taiwan

et al. 2018

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The badland soils originated from mudstone in southwestern Taiwan are inhospitable for plant growth because of their high‐salinity and poor physicochemical properties. Thorny bamboo is one of the few plants that can survive in these soils. To investigate the responses of the soil bacterial communities to plant cover, bare soils and soils from thorny bamboo plantations were analyzed with the barcoded pyrosequencing technique. Actinobacteria and Proteobacteria predominated in the bare soil communities, but Acidobacteria, Actinobacteria, and Proteobacteria were the most abundant groups in the thorny bamboo soils. Environmental stress may have selected for Actinobacteria in the bare community. Canonical correspondence analysis of the distributions of abundant operational taxonomic units also revealed consistent differences between the communities in the bamboo and bare soils. The bacterial diversity in the bamboo soils was also higher than that in the bare soils. The soluble organic carbon and nitrogen in bamboo soils were significantly higher, but electrical conductivity was lower than that in the bare soils. These soil properties, as well as soil pH, were related to the structure and diversity of the bacterial communities. Statistical analyses also indicated that these factors affected the distribution of Acidobacteria, Actinobacteria, Alphaproteobacteria, and Gammaproteobacteria. Analysis of thiocyanate oxidation activity revealed higher activity in the bare than in the bamboo soils, further suggesting differences in structure and metabolic activity between bamboo and bare soil microbial communities. Apparently, growth of thorny bamboo in the badland soil changed soil properties, which in turn directly and/or indirectly affected soil bacterial structure and diversity.

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Section: Introductionmentioning

confidence: 99%

“…2013). The badlands in southwestern Taiwan are formed from marine sedimentary rock (Lee, Chen, Wu, & Yang., 2013) and cover more than 1,000 km 2 . This area, often called a 'Moonscape World,' is representative of badlands in other parts of Monsoon East Asia.…”

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confidence: 99%

The influences of thorny bamboo growth on the bacterial community in badland soils of southwestern Taiwan

et al. 2018

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“…The results of this study point to badlands as the major sources of suspended sediment, thus management actions should focus on controlling sediment production from these areas. While García-Ruiz et al (2013) think that more studies are needed to understand the evolution and functioning of badland ecosystems and that little can be done to prevent sediment export, Lee et al (2013) demonstrate successful application of erosion control measures on previously bare badland structures developed on steep mudstone slopes in Taiwan. On studying Italian badlands that have become overgrown in recent years, Bierbaß et al (2014) found that vegetation plays a key role in altering soil properties, resulting in more stable slope conditions.…”

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confidence: 99%

Spectral fingerprinting: characterizing suspended sediment sources by the use of VNIR-SWIR spectral information

et al. 2014

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as well as at several subcatchment outlets. All samples were dried and measured for spectral 50 properties in the laboratory using an ASD spectroradiometer. Colour parameters and physically based 51 features (e.g. organic carbon, iron oxide and clay content) were calculated from the spectra. Principal 52 component analyses (PCA) were applied to all three types of samples to determine natural clustering 53 of samples, and a mixing model was applied to determine source contributions. 54Results and discussion: We found that fine sediment stored in the river bed seems to be mainly 55 influenced by grain size and seasonal variability, while sampling location -and thus the effect of 56 individual tributaries or subcatchments -seem to be of minor importance. Suspended sediment 57 sources were found to vary between, as well as within, flood events; although badlands were always 58 the major source. Forests and grasslands contributed little (<10%) and other sources (not further 59 determinable) contributed up to 40%. The analyses further suggested that sediment sources differ 60 among the subcatchments and that subcatchments comprising relatively large proportions of 61 badlands contributed most to the four flood events analyzed. 62Conclusions: Spectral fingerprints provide a rapid and cost-efficient alternative to conventional 63 fingerprint properties. However, a combination of spectral and conventional fingerprint properties 64 could potentially permit discrimination of a larger number of source types. 81Knowledge of sediment provenance is a key factor in understanding sediment transport and delivery 82 processes and thus a first step in the design of sustainable watershed management strategies 88with little or no vegetation […] in an intensely dissected landscape" (Gallart et al. 2002). Lithology is a 89 major factor for badland development and though they are commonly considered characteristic of 90 dryland regions they also occur in more humid climates with high topographic gradients and intense 91 rainstorms (Gallart et al. 2002). Despite badlands being considered as major sediment sources, 92 significant changes in the colour of the suspended sediments have been observed between, and even 93 within, runoff events, suggesting the influence of varying sources. 94A direct approach to trace the origin of sediment is a method called fingerprinting. It is founded on the 95 principal assumptions that: (1) potential sediment sources can be discriminated based on a set of 96 characteristic properties ("fingerprints"); and (2) the comparison of these source characteristics with 97 those of (suspended) sediment allow for determination of relative source contribution (Collins and 100However, the adaptation of the technique as a management tool is hampered due to several reasons. 101Most importantly, the choice of successful fingerprint properties is highly site-specific and the lack of Poulenard et al. 2009Poulenard et al. , 2011 Martínez-Carreras 2010a, 2010b, 2010c Evrard et al. 2012; Legout et 108 al. 2013; Bros...

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“…The rills eroded materials from its upper part or in the inter-rill area and then transported them to the slope bottom. These sediments became the main source of deposition [64][65][66][67]. In this case, the gradient influenced the type of erosion processes that occurred [68].…”

Section: Importance Of Slope Gradientmentioning

confidence: 99%

“…The high rainfall intensity boosted the raindrop and stream flow in the slope head and enhanced rill development from the middle to the lower parts of the slope. Thus, they reduced the slope surface [14,67]. The rills eroded materials from the upper part or inter-rill area and then transported them to the slope bottom.…”

Section: Importance Of Slope Gradientmentioning

confidence: 99%

Application for Terrestrial LiDAR on Mudstone Erosion Caused by Typhoons

2019

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Storms are important agents for shaping the Earth’s surface and often dominate the landscape evolution of mudstone areas, by rapid erosion and deposition. In our research, we used terrestrial scanning LiDAR (TLS) to detect surface changes in a 30 m in height, 60 m in width mudstone slope. This target slope shows the specific erosion pattern during extreme rainfall events such as typhoons. We investigate two major subjects: (1) how typhoon events impact erosion in the target slope, and (2) how rills develop on the hillslopes during these observation periods. There were three scans obtained in 2011, and converted to two observation periods. The permanent target points (TP) method and DEMs of differences were used to check the accuracy of point cloud. The results showed that the average erosion rate was 5 cm during the dry period in 2011. Following the typhoons, the erosion rate increased 1.4 times to 7 cm and was better correlated with the increase in the rainfall intensity than with general precipitation amounts. The hillslope gradient combined with rainfall intensity played a significant role in the geomorphic process. We found that in areas with over 75° gradients with larger rainfall intensity showed more erosion that at other gradients. The gradient also influenced the rill development, which occurred at middle and low gradients but not at high gradients. The rills also created a transition zone for erosion and deposition at the middle gradient where a minimal change occurred.

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Method of mitigating the surface erosion of a high-gradient mudstone slope in southwest Taiwan

Cited by 20 publications

References 10 publications

The influences of thorny bamboo growth on the bacterial community in badland soils of southwestern Taiwan

The influences of thorny bamboo growth on the bacterial community in badland soils of southwestern Taiwan

Spectral fingerprinting: characterizing suspended sediment sources by the use of VNIR-SWIR spectral information

Application for Terrestrial LiDAR on Mudstone Erosion Caused by Typhoons

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