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RISS 인기검색어
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- 저자 : 유시창 ( Shi Chang Yoo ) (검색결과 4 건)
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부유유사(浮遊流砂)의 연직농도분포(鉛直濃度分布)에 관한 연구(硏究)
유시창 ( Shi Chang Yoo ),김희종 ( Hi Chong Kim ) 한국농공학회 1982 韓國農工學會誌 : 전원과 자원 Vol.24 No.4
To precict the suspended sediments which are 80% of total sediments in a flood disch-arge, an equation representing vertical distribution of sediment concentration was derived based upon the diffusion theory and the logalithmic velocity distribution function in the tubulent flow mechanism. The hypothesis that the uniform mass transfer is occurred at upper part along the center line of water depth, was established as a preconition to solve the problem. The theorecal and the observed values were compared. And the theoretical equation was modified to be fit the theoretical values the observed values. Observed results are as follow; 1) Equation 12) is the theoretical equation representing the vertical concentration distri-bution of suspended sedimenta 2) Rous&exonential type vertical concentration distribution equation shows signification errors near the water surface. But the equation 12) shows substation cocentration values near the water surface. 3) Equation 15) is the modified theoretical equation which is possible to predict the vertical concentration distribution of suspended sediments.
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柳時昶 진주산업대학교 1970 論文集 Vol.4 No.-
The purpose of this research is to obtain the design basins for various hydrologic construction with the specific system which suits the natural environmental condition in Korea. Ⅰ) Maximum rainfall per minute is correlated in certain degree with the daily rainfall, and following formular is obtained empirically. Y=19.1 T^0.45 T≤73.5hr Y=108.5 T^0.45 T≥73.5hr Ⅱ) The influence of the missed number of observed years is such that 60 years at the Maximum are allowable with a certain risk, and one year is negligible.
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柳時昶 진주산업대학교 1970 論文集 Vol.5 No.-
This report is proporsed to give design basins to the disigners who has charge of the utilization of water resourc. Water resoure is 1,100 billions ㎥(63.42 %) in Korea. The result get the following. 1. At the none flow recorded sits made of yearly flow duration curve is provided. The way to applicant these model to designe project agrees to the following ⅰ) compute total flow valume from river basin by kajiyama's emprical formula In case they should base in wind to take f-value with in 0.5∼0.706 ⅱ) change the total flow volume the flow volume the flow ratio duration unit per day(∑Q ㎥/sec-day) ⅲ) above tables suggest to us that rich flow volume, mean flow volume, low flow volume and lowest flow volume is 1,701,39 ㎥,648.15㎥ , 405.09㎥/sec , 251.16㎥/sec of total yearly flow respectively 2. Possibly utility water resoure that 63.43% of the total yearly flow volume in flash river is of no utility valuve. Because that River rapid flowing.
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傾斜面의 土壤侵蝕과 Ca(OH_2)에 의한 土壤保全 效果試驗
柳時昶 진주산업대학교 1968 論文集 Vol.2 No.-
According to the result of soil reosion rate depends on the different slope of structure we have obtained data as follows. (Measured): July, 1968∼Augst, 1963. (Run off of water) 95cc/sec. (soil texture)Sandy loam. By the mixture 1% Ca(OH)_2, 2%Ca(OH)_2, 3%Ca(OH)_2, 5%Ca(OH)_2 to 30^015` solpe of soil to 39gr, 19gr, 13gr, 9gr was run off during the 10 minutes. According to the comparison test between the method of soil erosion control by untreated soil and of soil control by the mixture 5%Ca(OH)_2 to slope of soil which untreated, soil was washed away more 300gr than the mixture 5% Ca(OH)_2 to soil during the 10 minutes. i.e. the more higher up mixture Ca(OH)_2 to soil of slope, goes the more soil loss be-comes. The protection of soil slope that is public construction, repair work railway, construction and erosion control work and ect.
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