知本溪中下游河道輸砂公式之沖淤預測適用性探討

Study on Applicability of Scouring and Silting Prediction Used River Sediment Transport Formula in Middle and Downstream of Chihpen River

劉承璋(Cheng-Chang Liu) ； 鍾宇泰(Yu-Tai Chung) ； 陳鈺同(Yi-Tong Chen) ； 陳淑慈(Shu-Tzu Chen) ； 許中立(Chung-Li Hsu)

《坡地防災學報》 16卷2期 (2017/12) Pp. 1-10

摘要

河道沖淤變化對於河川構造物之穩定有很大的影響，若能獲知河道沖淤變化之趨勢，再加以定期監測，就可有效保障河川構造物的安全及節省人力與物力的投資。本文以河床質的表面法與體積法之調查資料及相關水文分析資料，採用蕭克立胥輸砂公式進行計算，推估河道沖淤趨勢。並將之代入知本溪樂林橋河段的實際測量斷面資料作為驗證，探討水土保持技術規範所訂輸砂公式計算結果的趨勢之適用性。研究結果得知，蕭克立胥輸砂公式推估之河道沖淤趨勢與實際測量斷面資料大致相符，其中又以表面法配合蕭克立胥輸砂公式之推估趨勢較佳。

關鍵字

河道沖淤 ； 輸砂公式 ； 粒徑調查

並列摘要

The change of river scouring and siltation has a great influence on the stability of river structure. If the trend of river erosion and sediment change is obtained, and the monitoring of river structure can be effectively monitored, the safety of river structure and the investment of human and material resources can be effectively saved. In this research, the bed surface and the volume method of the survey data and related hydrological data, using Schoklitsch's sediment transport formula for calculation, to estimate the trend of river scouring and silting. And the actual measurement section data of the Lelin Bridge section of Chihpen River is used as the verification to discuss the applicability of the trend of the calculation result of the sand transport formula. And the actual measurement section data of the Lelin Bridge section of Chihpen River is used as the verification to discuss the applicability of the trend of the calculation result of the sediment transport formula in Soil and Water Conservation Technical Specification. The results show that the trend of scouring and silting on the river is similar to the actual measurement section result, and the bed surface method with Schoklitsch's sediment transport formula is more better for the estimation the trend of the scouring and silting.

並列關鍵字

Scouring and silting on the river ； Sediment transport formula ； Particle size survey