Estimation of Surface Water Availability for Shihmen Reservoir located in Taiwan

• Main Authors: Po-Jui kung, 龔柏叡
• Other Authors: Gwo-Hsing Yu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/42771180469815464406

碩士 === 淡江大學 === 水資源及環境工程學系碩士班 === 98 === The purpose of this study was to introduce a simple method for estimating stream flow with the exceedance probability of 85% (Q85) from readily available mean specific discharge data and catchment area. First of all, for each of the four streaflow stations located in Shihmen watershed, the dimensionless Q85 (normalized using monthly? mean stream flow) for each month of the year was estimated from past daily stream flow records. An accurate estimation of Q85 required a minimal time series length of 10 to 20. The dimensionless Q85 for different months of the year were then plotted against the respective specific mean discharges. A best fit curve was then determined based on adjusted R-square values. The correlation between Q85 and specific mean discharge for each station is described ay a unique curve. Once the best-fit curve for a specific stream gage is determined, Q85 for that specific location in the future then can be estimated from its updated specific mean discharge and the catchment area.