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題 名 | 塔塔加地區步道土壤沖蝕及其監測之研究(2)=Studies on the Trail Erosion and Monitoring of Tatachia Area, Yushan National Park, Central Taiwan(Ⅱ) |
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作 者 | 劉儒淵; | 書刊名 | 國立臺灣大學農學院實驗林研究報告 |
卷 期 | 14:4=230 2000.12[民89.12] |
頁 次 | 頁201-219 |
分類號 | 434.227 |
關鍵詞 | 踐踏衝擊; 步道劣化; 土壤沖蝕; 步道截面; 塔塔加地區; Trampling impact; Trail degradation; Soil erosion; Trail transect; Tatachia area; |
語 文 | 中文(Chinese) |
中文摘要 | 風景遊憩區步道狀況的長期調查與監測,可以反應出步道規劃設計的良窳,以及遊客踐踏衝擊的程度,使經營者能瞭解該步道的使用遊客人數是否超過其容納量,且能掌握何處、何時需要施行哪些經營措施,或據以評估經營策略之有效與否,為戶外遊憩區經營管理上重要的課題。 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1996年7月起至1999年7月止,繼續針對玉山國家公園塔塔加地區的三條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,分別進行三次之調查監測,並與1991~1994之調查研究結果相互對照,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,塔塔加步道(未施設舖面之路段)由於承受的遊客踐踏壓力最大,其步道截面三年來之年平均土壤沖蝕量達216.5cm2,步道寬度擴張率2.6%,為三條步道中沖蝕程度最嚴重醏;玉山步道之年平均沖蝕量95.7cm2,步道寬度擴張率2.1%;另沙里仙步道之登山遊客人數最少,其步道載面之年平均沖蝕量僅49.4cm2,步道寬度略為縮減,擴張率-1.6%,顯示其土壤沖蝕程度較為較微。唯和換算為截面單位寬度(cm)之沖蝕量,則以沙里仙步道的0.81cm2為最大,其次為玉山步道(0.65cm2),塔塔加步道則僅有0.55cm2。 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,與採用植群衝擊指數(IVI)評估植群衝擊效應所得結果頗為一致,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。 本研究並依據在塔塔加地區步道土壤沖蝕之調查、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 | A long-term investigation and monitoring of the trail condition on recreation areas will reflect the relevancy of trail designing and the extent of trampling impacts. Such measure implies whether the trails have been overused, when and where some techniques should be applied, or whether the managing strategies work or not. This is one of the major theme of impact management in outdoor recreation areas. This study as conducted at Tatachia area of Yushan National Park located in central Taiwan, aiming to explore the pattern and extent of trail degradation caused by visitors' trampling impacts. Monitoring was carried out in three continuous years from July 1996 to July 1999. 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 impact. The relationships between erosional impacts and tramplers' density and the environmental factors along the trails are examined. Some rudimentary conclusions are as follows: 1. The extent of trail erosion varied with the amount and density of tramplers. Within the last three years, the soil erosion of Tatachia Trail transect per year is as high as 216.5cm2. This figure represents the most serious extent of erosion among the three trails. The expanding rate of trail width is 2.6%. The soil erosion of Yushan Trail transect is 95.7cm2 per year and the expanding rate of trail width is only 2.1%. While on Salisen Trail, the former figure is merely 49.4cm2 and the latter is -1.6%. 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 Vegetation Impact (IVI). Both parameters should be the easy and practical indicator for monitoring the extent of trampling impacts in the trail management of outdoor recreation areas. Some suggestions were offered to the authorities concerned to minimize the impacts of trail erosion in their management. |
本系統中英文摘要資訊取自各篇刊載內容。