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      저자 : 정하우 ( Har Woo Jung ) (검색결과 1 건)
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      • 흙 수로(水路)에 대(對)한 삼투손실량(渗透損失量) 추정(推定)에 관(關)한 실험적(實驗的) 연구(硏究)

        정하우 ( Har Woo Jung ),유한열 ( Han Yeol Ryu ) 한국농공학회 1973 韓國農工學會誌 : 전원과 자원 Vol.15 No.1

        Models of cross-sections and channels were made in order to measure seepage losses. Cross-sections were made of sand, sandy clay loam and loam, their thicknesses being 30cm and 40cm, respectively. Flow depths kept in the cross-sections were 4cm, 6cm, 8cm and 10cm. Straight and curved channel models were provided so as to measure seepage losses, when constant water depths maintained at the heads of the channels were 7.3cm and 5.7cm, respectively. The results obtained in this experiment are presented as follows: 1) A cumulative seepage loss per unit length at a point in the channel varies in accordance with time and flow depth. The general equation of cumulative seepage loss may be as follows (Ref. to Table V.25): 2) In case that the variation of water depth through the channel is slight, the total seepage loss may be computed by applying the following general equation: 3) Because seepage loss varies considerably according to water depth in case that the variation of flow depth through the channel is great, seepage loss should be computed by taking account of the change of flow depth. 4) The relation between time and traveling distance of water flow may be presented as the following general equation (Ref. to Table V.29): 5) The ratios of the seepage losses of the straight channel to the curved channel are 1:1.03 for a flow depth of 7.3cm and 1:1.068 for that of 5.7cm. 6) The ratios of the seepage losses occurring through the bottom to those through the inclined plane in the channel cross-section are 1:2.24 for a water depth of 8cm and 1:2.47 for a depth of 10cm in case that soil-layer is 30cm in thickness. Similarly, those ratios are 1:2.62 and 1:2.93 in case of a soil-layer thickness of 40cm (Ref. to Table V.5).

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