頁籤選單縮合
題名 | 合歡山區登山步道土壤沖蝕之研究=Studies on the Trail Erosion of Hohuanshan Area, Taroko National Park, Central Taiwan |
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作者 | 劉儒淵; | 書刊名 | 國家公園學報 |
卷期 | 14:1 2004.07[民93.07] |
頁次 | 頁55-73 |
分類號 | 436.193 |
關鍵詞 | 合歡山區; 步道惡化; 踐踏衝擊; 土壤沖蝕; 步道截面; Trampling impact; Trail deterioration; Soil erosion; Trail transect; Hohuanshan area; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以步道土壤沖蝕量為指標,採用步道截面重複測量方法,設置步道截面之固定觀測樣區,自2002年11月至2003年10月止,針對太魯閣國家公園合歡山地區的三條主要登山步道遭受遊客踐踏衝擊所產生的土壤沖蝕效應與程度,分別進行兩次之調查監測,同時探討其與遊客數量、步道沿線環境及植群衝擊調查介量間之關係。 研究結果顯示各步道之土壤沖蝕程度因遊客使用密度與其他環境條件的不同而呈現明顯的差異,合歡東峰步道由於承受的遊客踐踏壓力最大,其步道截面一年來之平均土壤沖蝕量達169.1 cm3/cm,步道寬度擴張率達6.56%,為三條步道中沖蝕程度最嚴重者;北合歡山步道之年平均沖蝕量99.3 cm3/cm,步道寬度擴張率1.52%:另石門山步道沿線因有若干平行步徑而分散登山遊客,其步道截面之年平均沖蝕量僅96.5cm3/cm,唯步道寬度擴張率達3.66%。 藉由步道寬度擴張率或表面凹陷深度的量測,均可據以推估步道土壤沖蝕的程度;而以步道截面斷面積的變化情形,供為評估土壤沖蝕程度的指標,與採用植群覆蓋減少率(CR)評估植群衝擊效應,或以土壤硬度增加率(SHI)反映土壤性質變化所得結果頗為一致,不失為戶外遊憩區步道衝擊監測作業中,評估遊憩衝擊程度之簡易而實用的技術。 本研究並依據相關的調查、監測結果,提出若干改善或防治步道土壤沖蝕之建議事項,供為有關單位及專家學者在從事遊憩衝擊研究或經營時之參考。 |
英文摘要 | This study was conducted at Hohuanshan area, a famous alpine snow-seeing site located in central Taiwan, aiming to explore the pattern and extent of trail degradation caused by visitors' trampling impacts. Monitoring was carried out from November 2002 to October 2003. With the method of reduplicate measurement on trail transect, three trails were sampled according to the density of tramplers, and the amount of soil erosion was adopted as the indicator for impacts. The relationships between erosional impacts and tramplers' density and the environmental factors along the trails were examined. Some rudimentary conclusions are as follows: 1. The extent of trail erosion varied with the amount and density of tramplers. The soil erosion of Mt. East Hohuan Trail transect per year is as high as 161.9 cm3/cm. This figure represents the most serious extent of erosion among the three trails. The expanding rate of trail width is 6.56%. The soil erosion of Mt. West Hohuan Trail transect is 99.3 m3/cm per year and the expanding rate of trail width is only 1.52%. While on Mt. Stonegate Trail, the former figure is merely 96.5 m3/cm and the latter is 3.66%. 2. In addition to the use-level of the trails, slope and soil texture of treads are the other significant factors that affects the degree of erosion. 3. Using the changes of transect area as an indicator estimating the degree of trail erosion considerably accords with the use of Index of cover reduction (CR) and soil hardness increase (SHI). Those parameters should be the easy and practical indicator for monitoring the extent of trampling impacts in the trail management of outdoor recreation areas. |
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