地形
Online ISSN : 2759-2529
Print ISSN : 0389-1755
34 巻, 3 号
選択された号の論文の3件中1~3を表示しています
論説
  • Rowland C TWIDALE, Jennifer A BOURNE
    2013 年 34 巻 3 号 p. 179-196
    発行日: 2013/07/25
    公開日: 2024/12/25
    ジャーナル フリー

    Epigene, etch, and exhumed surfaces of subCretaceous ages occur on the cratons bordering the Great Australian Basin on its western side. By contrast, and with the exception of the Einasleigh Uplands of north Queensland, the eastern margins, the western slopes of the Eastern Highlands, lack conclusive evidence of the age or ages of the planate palaeosurfaces that are preserved in the landscape. Yet the stratigraphy of the Basin sediments suggests that they ought to have overlapped on to the Palaeozoic rocks exposed in the Highlands, as they do on to the western cratons. The age of palaeosurface remnants on the western or inland slopes of much of the Eastern Highlands remains uncertain. The absence of diagnostic evidence is attributed basically to the magnitude and frequency of Phanerozoic tectonic events that have affected the eastern margin of the Basin. Recurrent uplift caused stream erosion that has eliminated critical evidence of landscape evolution.

技術ノート
  • 若月 強, 八反地 剛
    2013 年 34 巻 3 号 p. 197-212
    発行日: 2013/07/25
    公開日: 2024/12/25
    ジャーナル フリー

    Pressure transducer (pressure sensor) tensiometers are commonly used to monitor the water pressure head in soil. We performed laboratory experiments using a temperature control equipment to clarify the effect of air temperature on output voltage obtained from pressure sensors. We suggested a new calibration formula using the output voltage and air temperature. Under constant pressure head conditions, the decrease in pressure head calculated from the output voltage was linear and ranged between 0.13 and 0.43 cmH2O per 1°C rise in air temperature (4-13 cmH2O per 30°C air temperature rise). The output voltage decreased with an increase in the volume of air in the tensiometers. To obtain the accurate values regarding the pressure head variation, water level in body pipes of the pressure transducer tensiometers should be so high that the part connected to the pressure sensor is immersed in water.

研究ノート
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