Isamu NATSUKA, Hideaki ISHIMURA, Masaru TOKASHIKI, Mitsuhiro MORI and Tetsuo MIYATA Two techniques for controlling submerged floating geomembrane canopy systems for farm ponds were examined by laboratory model experiments. The first technique was to drain the excessive protection water, which is caused by the inflow of rainwater and reduces the farm pond water capacity, using an automatic drainage system without power supply. The drainage system composed of the floating drain hole and its positioning coupling string in the protection water showed the sufficient drainage performance. The second technique was to prevent the canopy from rising to the water surface by arranging weights on it. The results showed that the adequate adjustment of weights and its position was able to keep the canopy submerged in the uniform depth.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.