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題 名 | 水庫濱水帶不同植群土壤沖蝕量調查分析--以明湖水庫為例=Study on the Vegetation Type and Soil Erosion at the Reservoir Riparian Zone--A Case of Min-Hu Reservoir |
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作 者 | 林信輝; 吳錫融; 彭心燕; | 書刊名 | 水土保持學報 |
卷 期 | 40:4 2008.12[民97.12] |
頁 次 | 頁481-491 |
分類號 | 434.227 |
關鍵詞 | 水庫濱水帶; 土壤沖蝕量; 通用土壤流失公式; Reservoir riparian; Soil erosion; USLE; |
語 文 | 中文(Chinese) |
中文摘要 | 台灣地區地勢陡峻且乾濕季分明,水庫水位變化大,使水庫蓄水區側邊坡常發生土壤沖蝕等問題。因此,為了進一步探討水庫濱水帶植群與土壤沖蝕量之關係,本研究於南投縣明湖水庫選定三個調查林區(天然林區、人工林區及道路干擾林區)進行植生調查,並分別收集各調查區土壤沖蝕量,分析不同植生結構與土壤沖蝕量之關聯。以現地採集土壤沖蝕量(A)與估算之降雨沖蝕因子(Rm)、土壤沖蝕性指數(Km)以及複合坡形公式(SLCj)代入通用土壤流失公式(Universal Soil Loss Equation, USLE)反推求作物管理因子(C)值。人工林區植被以早期造林黑板樹與杉木為主,而林下為蕨類覆蓋,無裸露崩塌區域,故其作物管理因子(C)值為最低;而天然林區由於上層植被持續演替更新,故造成部分林區形成裸露,其作物管理因子(C)較人工林區為高,而道路干擾林區為最高。 |
英文摘要 | Due to the precipitous topography and distinct seasons is prone to variance of the water level in the reservoir in Taiwan, and it makes issues that the soil erosion frequently occurs on the side of the reservoir reserved area. Therefore, in order to further discuss the relation of the vegetation and soil erosion in the reservoir riparian. In the research, three forestry areas (natural forestry area, artificial forestry area and road-disturbing forestry area) in Min-hu Reservoir, which is located in Nan-tou County, are selected as the investigation regions. According to the different amounts of soil erosion in the three regions, the research carries out the analyses of the association between vegetation and soil erosion. Otherwise, the research also estimates the correlation between the vegetation structure and soil erosion. It puts the amounts of soil erosion collected in the fields, the estimated rainfall erosivity factor, the soil erosion index and the formula of multiple slope shape into USLE to acquire the cropping management factor (the value of C). The value of C is the lowest in artificial forestry area for the reason that it’s vegetation was mainly afforested by Alstonia scholaris (L.) R. Br. and firs in an early phase, and the forestry below was covered by ferns, not uncovered landslide region anymore. And the value of C in natural forestry area is higher than in artificial forestry as a result that it keeps renewable succession at upper level vegetation, also makes part of the forestry form in uncovered area. However, the value of C is the highest in road-disturbing forestry area. |
本系統中英文摘要資訊取自各篇刊載內容。