poster - International Conference of Agricultural Engineering
poster - International Conference of Agricultural Engineering poster - International Conference of Agricultural Engineering
(a) The whole monitoring sites (b) Youngin (YI) monitoring site (c) Osan (OS) monitoring site (d) Byeongjeom (BJ) monitoring site FIGURE 1: Study areas: a) entire landscape, b) control site near Idong reservoir, and two treatments of c) OS and d) BJ sites with Osan and Suwon WTPs, respectively. Paddy rice (Oryza sativa L. ssp. Japonica cv. Chucheongbyeo) widely cultivated in this region will be transplanted at all monitoring paddy fields and agricultural activities including fertilizing and irrigation will be investigated. The crop height and tiller number will be monitored every week at selected five paddy fields in each monitoring site during growing season from late May to early October. The rice growth and yield components including clum length, panicle number, grain filling rate, thousand grain weight, yields, contents of protein, contents of amylase and milled bead rice ratio will be analyzed with more than three sheaves of rice from each paddy field according to the standard method. FIGURE 2: Comparisons of the rice growth and yield components in 2011.
Fig. 2 shows the monitoring results in 2011 and there are not typical differences in the rice growth and yield components among three sites. 2.2.2. Effect on rice culture and soil characteristics of indirect wastewater reuse Ponded water depth in the OS and YI sites will be continuously measured by an automatic float type water level recorder. Two paddy fields will be equipped with an electronic flow meter with a data logger in the inlet and outlet. Weather data from the Suwon National Weather Station near the monitoring sites will be collected. The samples of irrigation and ponded water of each paddy field will be weekly taken to the laboratory for the growing season and analyzed according to standard methods from 2011 to 2014. The parameters will be analyzed for water quality are pH, EC (electrical conductivity), DO, TOC, BOD, COD, SS, T-N, T-P, NO 3 -N, NH 4 -N, PO 4 -P, CL - , Cu, SO 4 , Ni, Ca, Mg, Na, K, Zn, CN, CO 2- 3 , HCO 2- 3 , detergent, total and fecal coliforms and Escherichia coli. Soil samples will be taken from each paddy field before and after every crop cycle and two times during growing season, at depths decreasing from 0 to 0.8 m, every 0.2 m. They will be analyzed for pH, CEC (cation exchange capacity), EC, TOC, SiO 2 , T-N, T-P, NO 3 -N, NH 4 -N, P 2 O 5 , Cl - , Cd, Pb, Zn, Cu, Ni, As, Ca, Mg, Na, K, Hg, Mn, Cr 6+ and organic matter according to the standard method. Fig. 3 shows the analysis results of soil samples for EC and Na before the crop cycle. Soil samples of the OS and BJ sites irrigated with reclaimed wastewater contain much more sodium than the YI sites. FIGURE 3: Soil salinity results of EC and Na at each depth before the crop cycle in 2011 All the collected data are expected to be used as a basic data for assessing crop safety and environmental impact for agricultural wastewater reuse, and establishing comprehensive measures for wastewater reclamation and reuse in agriculture. 2.2.3. Guideline of indirect wastewater reuse for agriculture A guideline of indirect wastewater reuse for agriculture that could minimize adverse effect on crop safety, agro-ecological environment and human organism will be proposed. In order to propose the guideline, internal and external water quality standards for agriculture and wastewater reuse will be extensively reviewed. Furthermore, the effects of wastewater reuse on the quality of irrigated water will be monitored and simulated through hydrologic and water quality models. Each monitoring site of indirect wastewater reuse, the OS and BJ, has 10 sampling points, at the pumping station, every 0.5 km down the stream from effluent outlet to 3.0 km, 4.0 km and 5.0 km. Fig. 4 shows the sampling points for this study.
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(a) The whole monitoring sites<br />
(b) Youngin (YI) monitoring site<br />
(c) Osan (OS) monitoring site<br />
(d) Byeongjeom (BJ) monitoring site<br />
FIGURE 1: Study areas: a) entire landscape, b) control site near Idong reservoir, and two<br />
treatments <strong>of</strong> c) OS and d) BJ sites with Osan and Suwon WTPs, respectively.<br />
Paddy rice (Oryza sativa L. ssp. Japonica cv. Chucheongbyeo) widely cultivated in this<br />
region will be transplanted at all monitoring paddy fields and agricultural activities including<br />
fertilizing and irrigation will be investigated. The crop height and tiller number will be<br />
monitored every week at selected five paddy fields in each monitoring site during growing<br />
season from late May to early October. The rice growth and yield components including clum<br />
length, panicle number, grain filling rate, thousand grain weight, yields, contents <strong>of</strong> protein,<br />
contents <strong>of</strong> amylase and milled bead rice ratio will be analyzed with more than three sheaves<br />
<strong>of</strong> rice from each paddy field according to the standard method.<br />
FIGURE 2: Comparisons <strong>of</strong> the rice growth and yield components in 2011.
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