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필댐 하류사면 자생식물의 습생지수 결정

Determination of Hydrophyte Index of Native Plant on the Downstream Slope of Earth Fill Dam

  • Kim, Hyun Soo (Department of Agricultural Engineering, Kongju National University) ;
  • Ryu, Bum Hee (Department of Agricultural Engineering, Kongju National University) ;
  • Park, Seung Ki (Department of Regional Construction Engineering, Kongju National University)
  • 투고 : 2018.12.03
  • 심사 : 2019.01.08
  • 발행 : 2019.01.31

초록

The purpose of study was to determine the hygrophyte index of each plant(HIP) considering the moisture environment condition (MEC) of the native plants on the downstream slope of the fill dam and evaluate its applicability which to develop a method to search for leaks and saturated zones of the fill dam for status evaluation of precision safety diagnosis. The HIP was weighted average and consisted of 19 ranks. The weighted average was calculated according to the following three procedures: First, the linear assumption was made according to the actual habitat environmental conditions, the second one was weighted to 10% of the optimal habitat condition, and finally the average value of the distribution range values. The Hygrophyte index of vegetation at each plot (HIV) was obtained from the Sinheung reservoir (Yesan-gun, Chungcheongnam-do) using the results of vegetation survey of the Sinheung reservoir with precision safety diagnosis and suggested the use of the hygrophyte index of the cultivated vegetation. The average HIP range of plant species that emerged in 50 survey sites on the downstream slope of the Sinheung reservoir is 2.99 to 3.56. The coefficient of variation showed a large difference depending on the appearance of the leakage indicator plant(LIP) species. The range of HIV is 2.80 to 4.26, the mean value is 3.37, standard deviation is 0.37 and the coefficient of variation is 9.7%. As a result, the value of the coefficient of variation showed a large difference depending on the appearance of the plant species.

키워드

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Fig. 1 Survey point of vegetation survey at the Sinheung reservoir

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Fig. 2 Linear assumption of hygrophyte index

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Fig. 3 Photograph of representative leakage indicator plant(LIP)

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Fig. 4 Photograph of representative dry land indicator plant

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Fig. 5 Distribution of leakage indicator plant(LIP) species at the Sinheung reservoir

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Fig. 6 Photograph of leakage area plant at the Sinheung reservoir

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Fig. 7 Equivalent lines map of hygrophyte index on the downstream slope of the Sinheung reservoir

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Fig. 8 Map of electrical resistivity survey on the downstream slope of the Sinheungreservoir

Table 1 Hygrophyte index to moisture environment conditions(MEC)

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Table 2 Dominance degree of present species and percentage of individuals

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Table 3 HIP according to moisture conditions range(MEC)

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Table 4 Hygrophyte index of each plant(HIP)

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Table 5 HIP of the Sinheung reservoir slope vegetation

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Table 6 HIV of the Sinheung reservoir downstream slope

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