Trail conditions and soil erosion on Mt. Huangzuei trail of Yangmingshan National Park
Date Issued
2008
Date
2008
Author(s)
Li, Yu-Hsuan
Abstract
The recreational use of outdoor areas has increased dramatically in recent decades. Trail systems are a primary recreation resource facility of the wildland and provide visitors outdoor recreation opportunities. However, increasing recreational use has led to resource impacts. There are different types of impacts on trails caused by trampling or other destructive behavior. Major forms of trail impacts include root exposure, tread incision, wet muddy tread, tread widening, trail proliferation, and soil erosion. Soil erosion includes incision, soil loss and gully erosion. Erosion is the most serious and has the longest lasting impact on trails. his study used a trail census survey method to investigate trail condition on Mt. Huangzuei trail of Yangmingshan National Park and then analyzed the relationship between the characteristics of different impacts. Soil erosion was surveyed by using the MIP method (Maximum Incision: Post-construction), MIC method (Maximum Incision: Current Tread, MIC) and Trail Transects. The relationship between soil erosion, trail slope and vegetation types were analyzed based on the correlation analysis.he results revealed that rock exposure, wet muddy tread and excessive incision were the most common impact problems encountered and running water on trail had the least impact in this study area. Also, rock exposure, root exposure and excessive incision were significantly correlated with each other. Tread widening was significantly correlated with wet muddy tread and trail proliferation. Wet muddy tread was negatively correlated with root exposure, rock exposure, excessive incision and trail proliferation. In addition, the occurrences of impacts were correlated with trail width, trail depth, trail slope and vegetation types. Trail depth was positively correlated with trail slope. urthermore, the maximum incision depth measured by using MIP method and MIC method and the trail transect areas measured by using Trail Transects method were positively correlated with trail slope. The MIP, MIC and trail transect areas were found increase with trail slope. Therefore, the results indicated that trail slope is the essential and critical factor that influenced soil erosion. However, the amount of soil loss reached to a maximum as slope reached to degree IV (23%-29%) and a decrease in soil loss was found when slope was greater than degree IV, as the critical slope of 29%. Therefore, the amount of soil loss decreased after reached to a critical slpoe.
Subjects
trail
trail condition
recreation impacts
trail erosion
soil erosion
Yangmingshan National Park
Type
thesis
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