降雨沖蝕指數之修訂

Re-evaluation of Rainfall Erosivity Factor

盧光輝(Kwong Fai A. Lo)

《中華水土保持學報》 30卷2期 (1999/06) Pp. 87-94

https://doi.org/10.29417/JCSWC.199906_30(2).0001

摘要

近年來，臺灣地區山坡地開發，使得土壤沖蝕現象更加惡化。爲了有效規範山坡地開發，確實作好水土保持，有效的土壤沖蝕評估是當前刻不容緩的工作。本研究目的是針對影響土壤沖蝕諸多因子中，與雨水沖蝕關係最密切的因子「降雨沖蝕指數」進行修訂，利用近20年（1977-1994）全省各測站收集的降雨記錄，添增加至目前用於評估降雨沖蝕指數的資料庫內，以較長統計年數修訂降雨沖蝕指數，並繪製成臺灣年等降雨沖蝕指數圖，祈能增加其準確度及應用性。同時可進一步簡易化，一致化土壤沖蝕複雜推估技術，達到落實土壤沖蝕研究技術及推廣至使用者階層，確保水土資源永續不絶利用。

關鍵字

通用土壤流失公式 ； 雨水沖蝕 ； 降雨動能 ； 土壤流失推估技術 ； 水土資源保育

並列摘要

In recent years, intense development in Taiwan on steep slopes has resulted in rapid erosion-induced environmental deterioration. Thorough assessment of the soil erosion problem is, therefore, necessary to guarantee proper slopeland development and appropriate soil and water conservation practices. The main objective of this study is to re-evaluate one of the major factors affecting water erosion, which is the rainfall erosivity factor. Almost twenty years (1977-1994) of rainfall records were added to the original database to improve the accuracy and applicability of the rainfall erosivity factor. This allows more effective implementation of the soil erosion prediction technology and wider application of this technique on the user level. Furthermore, this effort will also help to ensure future sustainable development of soil and water resources in Taiwan.

並列關鍵字

Universal Soil Loss Equation ； water erosion ； rainfall kinetic energy ； soil loss prediction model ； soil and water resources conservation