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Design and Application of Subsurface Drainage Devices for Multipurpose Farmland
( Jong Gil Jeon ),( Yong Hun Choi ),( Min Young Kim ),( Young Gjin Kim ) 한국농업기계학회 2017 바이오시스템공학 Vol.42 No.4
Purpose: This study aims to identify the most stable boring shape among the circle, square, and inverted-triangle types in order to be applied to the development of a tractor-pulled underdrain boring device. Methods: The underdrain boring devices designed with the circle, inverted triangle, and square types were analyzed by numerical analysis, and they were evaluated by soil moisture and underground water level in the test field. Results: The results of the numerical analysis indicated that the increases in displacement, and strain when a uniform load is placed on the surface soil with soil weight were in the order of the inverted-triangle type, square type, and circle type. The soil moisture content and the underground water level after rainfall showed the largest difference in the order of the circle type, square type, and inverted-triangle type, indicating that the circle type had the largest drainage effects after rainfall. Conclusions: The overall findings of this study show that the circle type is the most stable among the circle, square, and inverted-triangle types.
Design and Application of Subsurface Drainage Devices for Multipurpose Farmland
Jeon, Jong Gil,Choi, Yong Hun,Kim, Min Young,Kim, Young Gjin Korean Society for Agricultural Machinery 2017 바이오시스템공학 Vol.42 No.4
Purpose: This study aims to identify the most stable boring shape among the circle, square, and inverted-triangle types in order to be applied to the development of a tractor-pulled underdrain boring device. Methods: The underdrain boring devices designed with the circle, inverted triangle, and square types were analyzed by numerical analysis, and they were evaluated by soil moisture and underground water level in the test field. Results: The results of the numerical analysis indicated that the increases in displacement, and strain when a uniform load is placed on the surface soil with soil weight were in the order of the inverted-triangle type, square type, and circle type. The soil moisture content and the underground water level after rainfall showed the largest difference in the order of the circle type, square type, and inverted-triangle type, indicating that the circle type had the largest drainage effects after rainfall. Conclusions: The overall findings of this study show that the circle type is the most stable among the circle, square, and inverted-triangle types.
인삼재배 논의 암거 깊이 및 간격별 배수효과 분석 - 토양수분 및 지하수위를 중심으로 -
전종길 ( Jeon Jong-gil ),이상봉 ( Lee Sang-bong ),이수장 ( Lee Su-jang ),문종필 ( Mun Jong-pil ),김민영 ( Kim Min-young ),이성우 ( Lee Seong-woo ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
This study was carried out to examinate the drainage effects of the shallow horizontal typed underdrain which can drain off excess water quickly in rainy wet season for produce ginseng crops stably in the paddy. Measured soil moisture data during 4 hours of rainfall (a total of 36mm rainfall) were 27.9kPa, 82.6kPa, 66.0kPa, and 47.5kPa in the control(untreated) plot and treated plots where underdrains were installed with 3m, 5m, and 7m intervals. Accordingly, soil moisture contents in a treated plot were lower than ones in a control plot. An average value of the ground water level in a control plot was -5.1㎝, while average values of the ground water levels in a treated plot where underdrains were installed with 3m, 5m, and 7m intervals were -51.0㎝, -37.9㎝ and -35.9㎝, respectively. In addition, the ground water level in a treated plot was 36.5㎝ lower than the one in a control plot.
전종길 ( Jeon Jong-gil ),김경원 ( Kim Kyung-won ),이인복 ( Lee In-bok ),천만복 ( Chun Man-bok ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-
Devices of diversion gate used at irrigation canal, as a irrigation structures of agriculture, have shown serious problems such as corrosion, defect, inconvenience of operation, etc. Accordingly, handy devices of diversion gate have been developed and then tested in the laboratory. The operating types of the prototype were a rack-and-pinion type, an improved screw type that only gate plate was moved up and down while the screw axis was unmoved, and a remote control type which can be controlled from 50m away using a remote control system. Those 3 types were developed, and the improved screw type was shown the best operation through the laboratory tests.
전종길 ( Jeon Jong-gil ),김경원 ( Kim Kyung-won ),이인복 ( Lee In-bok ),정광근 ( Chung Kwang-keun ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-
The results of the field tests with the prototype of the improved screw type show that the opening torque was 5Nrn, 64% decreased compared to 14Nm of the existed diversion gates. Moreover, there were no any rust as well as physical changes with various weather condition. While the operating times of the conventional screw and worm gear typed diversion gates were 233sec and 495sec, respectively, the operating time of the improved screw type was only 32sec, only 13.7% and 6.5%, respectively, of them. The amount of leakage was 0.4 liter per minute for the improved screw typed diversion gate while the conventional gate was shown l.5liter per minute according to gap, corrosion, defect, etc.
전종길 ( Jeon Jong-gil ),이상봉 ( Yi Sang-bong ),이수장 ( Yi Su-jang ),김진영 ( Kim Jin-young ),신재순 ( Shin Jae-sun ),서성 ( Seo Seong ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
This study was carried out to examinate drainage effect of the shallow horizontal culvert which can drain off excess water quickly in rainy wet season for produce forage crops stably in the paddy. The results of this study are as follows. In the measured data of soil moisture change for 38 hours after 37㎜ rainfall, the value of soil moisture tension in untreated control plot was 21.1kPa, while values of soil moisture tension for 3m, 5m, 7m culvert interval in treated control plot were 25.9kPa, 23.1kPa, 22.4kPa, respectively. Accordingly, soil moisture of treated control plot was shown more dried soil than that of untreated control plot. also, an average value of ground water level in untreated control plot was -4.3㎝, while average values of ground water level for 3m, 5m, 7m culvert interval in treated control plot was -31.1㎝, -27.8㎝ and -21.7㎝, respectively. It shows to go down 22.6㎝ comparing an average value of ground water level in treated control plot with that of ground water level in untreated control plot.
전종길 ( Jeon Jong-gil ),이상봉 ( Lee Sang-bong ),이수장 ( Lee Su-jang ),문종필 ( Mun Jong-pil ),김민영 ( Kim Min-young ),김영화 ( Kim Young-hwa ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
This study was carried out to select a suitable improver for underdrain to stably produce crops in a paddy area. Talk, small pumice stone, heated clay, coating chaff and chaff were considered based on unit price, specific gravity and availability. In this study, a total of 19 improvers were selected and compared to choose the best improver for an underdrain. The findings in this study are: 1) a change of soil moisture after rainfall showed that Talk was superior to de-water from soil; and 2) the lowest average ground water level was observed from an underdrain filling up with heated clay, followed by small pumice stone, Talk, coating chaff and chaff. This indicates that the performance of coating chaff was superior and its economic efficiency and drainage effect.
전종길 ( Jeon Jong-gil ),이상봉 ( Lee Sang-bong ),윤진하 ( Yun Jin-ha ),김진택 ( Kim Jin-taek ) 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
This study was carried out to examine the practicality of the prototype. The sensing-type automatic outlet was composed of four parts : sensor being made a signal by ponding depth, outlet body including L type pipe and drainage pipe, control box including power switch, controller, relay, and driving devices including motor, battery, etc. It was designed to open and close as the rotation angle of the L type pipe according to the signal of the sensor. The working performance of the developed outlet in the field was successfully carried out and something to do the supplementation were derived. We are expected to reduce farmer's working hours required for water management and saving irrigation water.