Impact of Structure Design of Artififical Upwelling Tube

Abstract:

Deep ocean water (DOW) is cold, nutrient-rich and pathogen-free water, which can be transported to the surface by upwelling. Upwelling can change the temperature and nutrient distribution of the surrounding water, hence improves the marine ecological environment and the marine primary productivity. Two lake experiments were accomplished in Qiandao Lake .The first experiment was done with hard PVC upwelling tube, while in the second experiment , the upwelling tubes with different diameters (0.5 m, 1 m, 1.5 m and 2 m) were made of nylon ,which are supported by rings. It can be concluded that upwelling ratio (the ratio of water volume flow rate and air volume flow rate) of the hard PVC upwelling tube was higher than that of soft nylon upwelling tube, and in condition of soft nylon upwelling tube, upwelling ratio of 1 m diameter tube was higher than that of others, providing important guidance for the next sea trial.

• Periodical: Applied Mechanics and Materials (Volumes 496-500)
• Pages: 547-550
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.496-500.547
• Online since: January 2014
• Authors: Jin Ying Leng, Jia Wang Chen*, Hao Cai Huang, Shan Lin, Ming Zhou Liu, Jun Bo Liu
• Keywords: Air Lift, Artificial Upwelling, Structure Design, Upwelling Ratio, Upwelling Tube

References

[1] Ouchi K, Otsuka K, Omura H. Recent Advances of Ocean Nutrient Enhancer TAKUMI, Project[C]/Proc 6th ISOPE Ocean Mining Symp. 2005: 7-12.

[2] Aure J, Strand O, Erga S R, et al. Primary production enhancement by artificial upwelling in a western Norwegian fjord[J]. MARINE ECOLOGY-PROGRESS SERIES-, 2007, 352: 39.

DOI: 10.3354/meps07139

[3] Van Geen A, Takesue R K, Goddard J, et al. Carbon and nutrient dynamics during coastal upwelling off Cape Blanco, Oregon [J]. Deep Sea Research Part II: Topical Studies in Oceanography, 2000, 47(5): 975-1002.

DOI: 10.1016/s0967-0645(99)00133-2

[4] Ikeda T, Hayashi M, Otsuka K. Assessment of environmental effect and fertilization at deep seawater discharged area[C]/ Proc 12th ISOPE. 2002 (12): 480-485.

[5] Liang N K, Peng H K. A study of air-lift artificial upwelling [J]. Ocean engineering, 2005, 32(5): 731-745.

DOI: 10.1016/j.oceaneng.2004.10.011

[6] S. Ogiwara, Y. Awashima, H. Miyabe, and K. Ouchi. Conceptual Design of a Deep Ocean Water Upwelling Structure for Development of Fisheries[C]. 4th ISOPE Ocean Mining Symp, ISOPE-OMS-2001: 150-157.

[7] Clark. C K Liu, Qiao Jin. Artificial upwelling in regular and tandom waves [J]. Ocean Enginnering, 1995, 4: 337-350.

[8] X.R. Zhang, S. Maruyama, S. Sakai, K. Tsubaki, M. Behnia. Flow prediction in upwelling deep seawater—the perpetual salt fountain [J]. Deep-Sea Research I, 51(2004): 1145-1157.

DOI: 10.1016/j.dsr.2004.03.010

[9] Shigenao Maruyama, etc. Evidences of increasing primary production in the ocean by Stommel's perpetual salt fountain [J]. Deep-Sea Research I, 58(2011): 567-574.

DOI: 10.1016/j.dsr.2011.02.012

[10] Tsubaki K, Maruyama S, Komiya A, et al. Continuous measurement of an artificial upwelling of deep sea water induced by the perpetual salt fountain [J]. Deep Sea Research Part I: Oceanographic Research Papers, 2007, 54(1): 75-84.

DOI: 10.1016/j.dsr.2006.10.002

[11] McClimans T A, Handa A, Fredheim A, et al. Controlled artificial upwelling in a fjord to stimulate non-toxic algae [J]. Aquacultural Engineering, 2010, 42(3): 140-147.

DOI: 10.1016/j.aquaeng.2010.02.002

[12] Fan W, Chen J, Pan Y, et al. Experimental study on the performance of an air-lift pump for artificial upwelling [J]. Ocean Engineering, 2013, 59: 47-57.

DOI: 10.1016/j.oceaneng.2012.11.014

[13] Lu L, Pan H, Fan W, et al. A Preliminary Study on Efficiency of Air-Lift Upwelling [J]. Advanced Materials Research, 2012, 422: 424-429.

DOI: 10.4028/www.scientific.net/amr.422.424