Evaluation and Validation of Revised Universal Soil Loss Equation on hillslope tea plantation

• Main Authors: Hu, Tze-Chien, 胡自健
• Other Authors: Lin Li-Ling
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/56973005674121828629

碩士 === 國立中興大學 === 水土保持學類 === 84 === In recent years,intense development on steep slopes has resulted inrapid erosion and induced environment deterioration. Thorough assessmentof soil erosion problem is, therefore, necessary to ensure proper slopelanddevelopment and appropriate soil and water conservation practices.Some soil erosion predition models, such as USLE and AGNPS have been appliedto evaluate the soil erosion on slopeland. However, these models raise theequation of what must be done to adapt them to Taiwan.The Revised Universal Soil Loss Equation (RUSLE) is a new soil erosion preditiontechnology and is developed to extend the applicability of USLE. RUSLE is a computersoftware and every factor of RUSLE incorporates new data, new parameters that havebeen found to have an impact on erosion, and new empirical relationships to reflectthose impacts.The suitability of applying RUSLE model in Taiwan also need to be validated.The objective of this study is to evaluate the capability of RUSLE in predicting soilerosion on hillslope. The soil loss predicted by the RUSLE was validated with datacollected from field experiments conducted at Yuchih Tea experiment station.The results indicated that RUSLE was able to adequately predict soil loss on hillslope.In the initial factors, for example C factor and P factor, a large database and inputof a new field practice must be constructed. These can be used for hillside and benchterrace on Taiwan's conservation practices. The more exact the input data, the moreaccurate is the result.The city, crop, and management database at Yuchih Tea experiment station have beenconstructed. The preliminary research results are:the R index is 756 and is approximatelyequal to 0.85 times to USLE's R index. The C values range from 0.14 to 0.04 for the 1-yearto 10-years' old Assam tea plants.