Design and Evaluation of a Flow Rotate Divider for Sampling Runoff Plots.
2008
Zhang, Y.S. (National Academy of Agricultural Science, RDA, Suwon, Republic of Korea), E-mail: [email protected] | Park, C.W. (National Academy of Agricultural Science, RDA, Suwon, Republic of Korea) | Lee, G.J. (National Institute of Crop Science, RDA, Suwon, Republic of Korea) | Lee, J.T. (National Institute of Crop Science, RDA, Suwon, Republic of Korea) | Jin, Y.I. (National Institute of Crop Science, RDA, Suwon, Republic of Korea) | Hwang, S.W. (National Institute of Crop Science, RDA, Suwon, Republic of Korea)
For the standard method of collecting the run-off, it is consumed the high cost and much effort to install and to manage this instrument. Because the all the soil and water from reservoir tank must be eliminate after their measurement of amount of soil loss and run-off and installed the reservoir tank at regular size in the experimental field. Therefore, objective of this study was to compare its efficacy between the standard method and a flow rotate divider for continuously collecting and measuring the soil loss and run-off in order to conveniently conduct the field experiment of the lysimeters. For collecting the sampling of soil loss and run-off from agricultural land with invariable ratio, a flow rotate divider was consisted with a 8 blades of round plate sloped in order to collect the invariable ratio of soil and water at lowest part from round plate by the law of gravity. For comparing its accuracy in the batch scale experiment, it shown that there was significantly a positive linear corelation (r=0.997***) between flowing and sampling amounts with adjusting the range from 1 to 10 L min-¹ with flowing rate. In collecting ratio in the field experiment, it observed that the more its accuracy had, the more soil loss and run-off.
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