Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Seiya Nagaoka"'
Publikováno v:
Paddy and Water Environment. 18:345-353
Repairs of concrete irrigation channels in Japan are guided to a large extent by the degree to which their walls have degraded over decades of use. Current methods of estimating Manning roughness coefficients from the roughness of the channel wall ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6bcef6f83a313c5c8e0cc0e578b0d523
https://doi.org/10.1007/s10333-019-00786-3
https://doi.org/10.1007/s10333-019-00786-3
Development of a measurement method for abrasion irrigation channel using underwater ultrasonic wave
Publikováno v:
Paddy and Water Environment. 17:549-554
Japan has many concrete irrigation channels with total length of about 400,000 km. Most of these channels are now too old for continued use. It would be too costly to reconstruct these channels. The concrete surfaces of the channels have been abraded
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec4a1d0d39f0393177855405a27fb7e8
https://doi.org/10.1007/s10333-019-00751-0
https://doi.org/10.1007/s10333-019-00751-0
Publikováno v:
International Journal of GEOMATE. 14
In Japan, the total length of the main concrete agriculture irrigation canals is estimated to beabout 50,000 km. These canals deteriorate over time and most of the canal surface has become rough. Onemethod of measurement of the roughness of the concr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e25abae7ffe8bf34e1e59fc754949fd
https://doi.org/10.21660/2018.42.7242
https://doi.org/10.21660/2018.42.7242
Publikováno v:
International Journal of GEOMATE; Feb2018, Issue 2, p158-163, 6p