WATER BOTTOM LANDFORM MEASURING DEVICE

To provide a water bottom landform measuring device which can easily measure a landform of a water bottom even if water is extremely contaminated with mud.SOLUTION: A water bottom measuring device 10 for measuring a landform (shape of a water bottom face 2) of a water bottom comprises: a beam 31 substantially-horizontally extending while separating upward of the water bottom; a horizontal moving device (for example, a rotating device 20) for supporting the beam 31, and horizontally moving the beam 31; a rod-shaped member 33 arranged at the beam 31 so as to be liftable with respect to the beam 31; a wheel 34 arranged at a lower end part of the rod-shaped member 33, and rolling on the water bottom; a beam position measurement part 51 for measuring a position (for example, an angle position (angle θ1)) of the beam 31; and a rod-shaped member displacement amount measurement part 52 for measuring a displacement amount (lift amount) ΔH of the rod-shaped member 33 with respect to the beam 31.SELECTED DRAWING: Figure 6 【課題】水中が泥などで非常に汚れていても水底の地形を容易に計測可能な水底地形計測装置を提供する。【解決手段】水底の地形（水底面２の形状）を計測する装置である水底地形計測装置１０は、水底の上方に離間して略水平に延びるビーム３１と、ビーム３１を支持し、かつ、ビーム３１を水平移動させる水平移動装置（例えば回転装置２０）と、略鉛直に延び、かつ、ビーム３１に対して昇降可能なようにビーム３１に設けられる棒状部材３３と、棒状部材３３の下端部に設けられて水底上を転動可能な車輪３４と、ビーム３１の位置（例えば角度位置（角度θ１））を測定するビーム位置測定部５１と、ビーム３１に対する棒状部材３３の変位量（昇降量）ΔＨを測定する棒状部材変位量測定部５２と、を備える。【選択図】図６