Assessment of Wastewater Reuse Effects on Nutrient Loads from Paddy Field Using Field-Scale Water Quality Model
Assessment of Wastewater Reuse Effects on Nutrient Loads from Paddy Field Using Field-Scale Water Quality Model
复制标题
使用田间水质模型评估废水回用对稻田养分负荷的影响
DOI：
10.1007/s10666-008-9147-5
复制
发表时间：
2008
影响因子：
2.4
通讯作者：
Taeil Jang
中科院分区：
文献类型：
--
作者：
S. M. Kim;S. Im;Seungwoo Park;Jeong Jae Lee;B. Benham;Taeil Jang
CREAMS-PADDY是一个改进的田间CREAMS模型，模拟了稻田的水文、泥沙和养分循环。应用CREAMS-PADDY模型估算了韩国利用废水灌溉对稻田养分负荷的影响。利用两个稻田的数据对模型进行了标定和验证。校正期和验证期的总氮和总磷实测值与模拟值的决定系数分别为0.92和0.57，分别为0.84和0.73。模拟结果表明，当使用污水灌溉时，与常规水灌溉相比，总氮负荷增加了210%，总磷增加了1，270%。与常规灌溉相比，蓄水池中的总氮和总磷浓度分别增加了254%和534%。减少氮，磷施肥量的影响，10%，30%和50%的退出稻田养分负荷也模拟验证CREAMS-PADDY模型。这些模拟表明，从水稻的总磷负荷只有轻微减少减少化肥，而总氮负荷减少了8.8%，16.6%和24.4%，当N肥率分别减少了10%，30%和50%。
CREAMS-PADDY, a modified version of the field-scale CREAMS model, simulates the hydrologic, sediment, and nutrient cycles in paddy fields. The CREAMS-PADDY model was applied to estimate the effects of using wastewater for irrigation on nutrient loads from paddy fields in Republic of Korea. The model was calibrated and validated using data from two rice paddy fields. The coefficient of determination between observed and simulated total nitrogen and total phosphorus were 0.92 and 0.57, respectively, for the calibration period and 0.84 and 0.73 for the validation period. Simulations showed that when using wastewater for irrigation, the total nitrogen loads increased by 210% and total phosphorus by 1,270% when compared with conventional water irrigation. The total nitrogen and total phosphorus concentration in the ponded water increased by 254 and 534%, respectively, when compared with conventional water irrigation. The effect of reducing N and P fertilizer application rates by 10, 30, and 50% on nutrient loads exiting a paddy field were also simulated using the validated CREAMS-PADDY model. These simulations indicated that total phosphorus loads from the paddy were reduced only slightly by reducing the fertilizer, while total nitrogen loads were reduced by as much as 8.8, 16.6, and 24.4% when N ferlitizer rates were reduced by 10, 30, and 50%, respectively.