2010 International Conference on Management and Service Science, 2010
This study is designed to explore the relationship between the Wenchuan earthquake and tourist pe... more This study is designed to explore the relationship between the Wenchuan earthquake and tourist perceptions of it, at Jiuzhaigou valley in China. Data were analyzed from a sample of 196 first-time and repeat visitors to the Jiuzhaigou Valley during National Day, the first Golden Week of tourism after the earthquake. The results indicate that: (1) The influence of this earthquake
The detachment of soil particles by raindrop splash is usually regarded as an important first ste... more The detachment of soil particles by raindrop splash is usually regarded as an important first step in soil erosion and sediment transport. The detached material can then be transported by both splash erosion and overland flow. As an important substance which can significantly influence the global Carbon (C) cycle and climate change, soil organic carbon (SOC) is moved by these erosion processes. Most detached soil material is aggregated. The properties of aggregates therefore affect the settling velocity and thus transport distance and redistribution of eroded SOC in terrestrial and aquatic environments. Recent research recognized the importance of settling velocity as an independent parameter in the soil erosion models, but it is very difficult to quantify the settling velocity of the aggregates from their sizes due to variations in their density, shape, roundness and pore-space. It is therefore necessary to fully understand the dynamics of aggregate breakdown for determining the se...
Raindrop impact and subsequent aggregate breakdown can potentially change the movement behaviour ... more Raindrop impact and subsequent aggregate breakdown can potentially change the movement behaviour of soil fractions and thus alter their transport distances when compared against non-impacted aggregates. In a given water layer, the transport distances of eroded soil fractions, and thus that of the associated substances across landscapes, such as soil organic carbon (SOC) and phosphorous, are determined by the settling velocities of the eroded soil fractions. However, using mineral size distribution to represent the settling velocities of soil fractions, as often applied in current erosion models, would ignore the potential influence of aggregation on the settling behaviour of soil fractions. The destructive effects of raindrops impacting onto aggregates are also often neglected in current soil erosion models. Therefore, the objective of this study is to develop a proxy method to effectively simulate aggregate breakdown under raindrop impact, and further identify the settling velocity...
Selective erosion of soil has received substantial attention since it largely accounts for the en... more Selective erosion of soil has received substantial attention since it largely accounts for the enrichment of substances such as soil organic carbon (SOC) or phosphorous in sediments. However, recent research recognized the necessity to distinguish properties of eroded soil particles, even after non-selective mobilization by raindrop impact and runoff, according to their potential transport distances through a catchment. In theory, particle transport distance declines with increasing settling velocity. Settling velocity itself is determined by size, density and shape of particles. For eroded soil particles, these properties vary not only due to texture, but also aggregation and aggregate stability. The properties of the eroded aggregates (or their fragments) in turn are influenced by aggregation, e.g. the content of organic matter of individual particles. This leads in theory to a specific pattern of redistribution of the eroded aggregates according to their settling velocity in an a...
2010 International Conference on Management and Service Science, 2010
This study is designed to explore the relationship between the Wenchuan earthquake and tourist pe... more This study is designed to explore the relationship between the Wenchuan earthquake and tourist perceptions of it, at Jiuzhaigou valley in China. Data were analyzed from a sample of 196 first-time and repeat visitors to the Jiuzhaigou Valley during National Day, the first Golden Week of tourism after the earthquake. The results indicate that: (1) The influence of this earthquake
The detachment of soil particles by raindrop splash is usually regarded as an important first ste... more The detachment of soil particles by raindrop splash is usually regarded as an important first step in soil erosion and sediment transport. The detached material can then be transported by both splash erosion and overland flow. As an important substance which can significantly influence the global Carbon (C) cycle and climate change, soil organic carbon (SOC) is moved by these erosion processes. Most detached soil material is aggregated. The properties of aggregates therefore affect the settling velocity and thus transport distance and redistribution of eroded SOC in terrestrial and aquatic environments. Recent research recognized the importance of settling velocity as an independent parameter in the soil erosion models, but it is very difficult to quantify the settling velocity of the aggregates from their sizes due to variations in their density, shape, roundness and pore-space. It is therefore necessary to fully understand the dynamics of aggregate breakdown for determining the se...
Raindrop impact and subsequent aggregate breakdown can potentially change the movement behaviour ... more Raindrop impact and subsequent aggregate breakdown can potentially change the movement behaviour of soil fractions and thus alter their transport distances when compared against non-impacted aggregates. In a given water layer, the transport distances of eroded soil fractions, and thus that of the associated substances across landscapes, such as soil organic carbon (SOC) and phosphorous, are determined by the settling velocities of the eroded soil fractions. However, using mineral size distribution to represent the settling velocities of soil fractions, as often applied in current erosion models, would ignore the potential influence of aggregation on the settling behaviour of soil fractions. The destructive effects of raindrops impacting onto aggregates are also often neglected in current soil erosion models. Therefore, the objective of this study is to develop a proxy method to effectively simulate aggregate breakdown under raindrop impact, and further identify the settling velocity...
Selective erosion of soil has received substantial attention since it largely accounts for the en... more Selective erosion of soil has received substantial attention since it largely accounts for the enrichment of substances such as soil organic carbon (SOC) or phosphorous in sediments. However, recent research recognized the necessity to distinguish properties of eroded soil particles, even after non-selective mobilization by raindrop impact and runoff, according to their potential transport distances through a catchment. In theory, particle transport distance declines with increasing settling velocity. Settling velocity itself is determined by size, density and shape of particles. For eroded soil particles, these properties vary not only due to texture, but also aggregation and aggregate stability. The properties of the eroded aggregates (or their fragments) in turn are influenced by aggregation, e.g. the content of organic matter of individual particles. This leads in theory to a specific pattern of redistribution of the eroded aggregates according to their settling velocity in an a...
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