应用DRAINMOD-NⅡ模型对暴雨后稻田排水量和氮素模拟
|
摘要
为研究暴雨后稻田氮素的排放过程,在宿迁市船行灌区开展了试验,测定了常规灌排和控制灌排模式下暴雨后NH_4~+—N、NO_3~-—N的浓度和稻田排水量,并用DRAINMOD-N Ⅱ模型对暴雨后稻田排水量、NH_4~+—N和NO_3~-—N流失负荷进行模拟。试验结果表明:控制灌排模式可以显著减少雨后稻田排水量和氮素排放量;在两种灌排模式下,DRAINMOD-N Ⅱ模型对雨后排水量模拟值与测量值的相对误差RE在2%以内,相关系数R在0.98以上,模拟效率系数NS在0.96以上,对NH_4~+—N和NO_3~-—N流失负荷的模拟值与测量值的相对误差在5%以内,相关系数R在0.95以上,模拟效率系数NS在0.90以上,因此通过模型率定得到的各参数值较为合理,可以利用该DRAINMOD-NⅡ模型对未来暴雨后稻田排水量、NH_4~+—N和NO_3~-—N流失负荷进行预测。
In order to explore the process of nitrogen emission from paddy field after rainstorm,a field experiment was conducted at Chuanhang irrigation district,located in Suqian,Jiangsu Province.The concentration of NH_4~+—N and NO_3~-—N,paddy drainage were measured at conventional and controlled irrigation and drainage mode.And the DRAINMOD-N Ⅱ mode was used to simulate the drainage load of paddy fields,NH_4~+—N and NO_3~-—N loss after rainstorm.Measured results show that: controlled irrigation and drainage mode can significantly reduce paddy field drainage and nitrogen emission after rainstorm.The relative error RE between the simulated and measured values of drainage after rain using the DRAINMOD-N Ⅱ model is less than 2%,the correlation coefficient R is above 0.98,and the simulation efficiency NS is more than 0.96.The relative error RE between the simulated and measured values of NH_4~+—N and NO_3~-—N is less than 5%,the correlation coefficient R is above 0.95,and the simulation efficiency NS is more than 0.90.Therefore,the parameters obtained by model calibration are more reasonable,and the DRAINMOD-N Ⅱ model can be used to predict the drainage after rainstorm,NH_4~+—N and NO_3~-—N loss in the future.
In order to explore the process of nitrogen emission from paddy field after rainstorm,a field experiment was conducted at Chuanhang irrigation district,located in Suqian,Jiangsu Province.The concentration of NH_4~+—N and NO_3~-—N,paddy drainage were measured at conventional and controlled irrigation and drainage mode.And the DRAINMOD-N Ⅱ mode was used to simulate the drainage load of paddy fields,NH_4~+—N and NO_3~-—N loss after rainstorm.Measured results show that: controlled irrigation and drainage mode can significantly reduce paddy field drainage and nitrogen emission after rainstorm.The relative error RE between the simulated and measured values of drainage after rain using the DRAINMOD-N Ⅱ model is less than 2%,the correlation coefficient R is above 0.98,and the simulation efficiency NS is more than 0.96.The relative error RE between the simulated and measured values of NH_4~+—N and NO_3~-—N is less than 5%,the correlation coefficient R is above 0.95,and the simulation efficiency NS is more than 0.90.Therefore,the parameters obtained by model calibration are more reasonable,and the DRAINMOD-N Ⅱ model can be used to predict the drainage after rainstorm,NH_4~+—N and NO_3~-—N loss in the future.
引文
[1]徐鹏程,张兴奇.江苏省主要农作物的生产水足迹研究[J].水资源与水工程学报,2016,27(1):232-237.
[2]晏维金,尹澄清,孙濮,等.磷氮在水田湿地中的迁移转化及径流流失过程[J].应用生态学报,1999,10(3):312-316.
[3]陈建平,李想,王明玉,等.水稻田铁锰对氮素转化影响的实验研究[J].水资源与水工程学报,2012,23(1):109-111.
[4]冯国禄,杨仁斌.不同耕作模式下稻田水中氮磷动态特征及减排潜力[J].生态学报,2011,31(15):4235-4243.
[5]彭世彰,张正良,罗玉峰,等.灌排调控的稻田排水中氮素浓度变化规律[J].农业工程学报,2009,25(9):21-26.
[6]季亚辉,俞双恩.水位管理对稻田地表水总磷的影响[J].河海大学学报(自然科学版),2008,36(6):777-780.
[7]BREVM A,SKAGGS R W,GILLIAM J W,et al.Field testing of DRAINMOD-N[J].Transactions of the Asae,1997,40(4):1077-1085.
[8]HAWARY A E,ATTA Y,SAADI A E.Assessment of the DRAINMOD-N II model for simulating nitrogen losses in newly reclaimed lands of Egypt[J].Alexandria Engineering Journal,2015,54(4):1305-1313.
[9]罗纨,贾忠华,SKAGGS R W,等.利用DRAINMOD模型模拟银南灌区稻田排水过程[J].农业工程学报,2006,22(9):53-57.
[10]王少丽,王兴奎,PRASHER S O,等.应用DRAINMOD农田排水模型对地下水位和排水量的模拟[J].农业工程学报,2006,22(2):54-59.
[11]景卫华.农田排水系统管理及氮素流失模拟研究[D].西安:西安理工大学,2010.
[12]陈丽群,胡铁松.DRAINMOD模型参数灵敏度分析[J].节水灌溉,2011(10):37-41.
[13]洪林,罗文兵.基于DRAINMOD的农田地表径流氮素流失动态模拟[J].水科学进展,2011,22(5):703-709.
[14]高学睿,董斌,秦大庸,等.用DRAINMOD模型模拟稻田排水与氮素流失[J].农业工程学报,2011,27(6):52-58.
[15]王宁,俞双恩,叶兴成.DRAINMOD-NⅡ模拟暴雨后稻田排水及氮素变化[J].人民黄河,2014,36(10):136-140.
[2]晏维金,尹澄清,孙濮,等.磷氮在水田湿地中的迁移转化及径流流失过程[J].应用生态学报,1999,10(3):312-316.
[3]陈建平,李想,王明玉,等.水稻田铁锰对氮素转化影响的实验研究[J].水资源与水工程学报,2012,23(1):109-111.
[4]冯国禄,杨仁斌.不同耕作模式下稻田水中氮磷动态特征及减排潜力[J].生态学报,2011,31(15):4235-4243.
[5]彭世彰,张正良,罗玉峰,等.灌排调控的稻田排水中氮素浓度变化规律[J].农业工程学报,2009,25(9):21-26.
[6]季亚辉,俞双恩.水位管理对稻田地表水总磷的影响[J].河海大学学报(自然科学版),2008,36(6):777-780.
[7]BREVM A,SKAGGS R W,GILLIAM J W,et al.Field testing of DRAINMOD-N[J].Transactions of the Asae,1997,40(4):1077-1085.
[8]HAWARY A E,ATTA Y,SAADI A E.Assessment of the DRAINMOD-N II model for simulating nitrogen losses in newly reclaimed lands of Egypt[J].Alexandria Engineering Journal,2015,54(4):1305-1313.
[9]罗纨,贾忠华,SKAGGS R W,等.利用DRAINMOD模型模拟银南灌区稻田排水过程[J].农业工程学报,2006,22(9):53-57.
[10]王少丽,王兴奎,PRASHER S O,等.应用DRAINMOD农田排水模型对地下水位和排水量的模拟[J].农业工程学报,2006,22(2):54-59.
[11]景卫华.农田排水系统管理及氮素流失模拟研究[D].西安:西安理工大学,2010.
[12]陈丽群,胡铁松.DRAINMOD模型参数灵敏度分析[J].节水灌溉,2011(10):37-41.
[13]洪林,罗文兵.基于DRAINMOD的农田地表径流氮素流失动态模拟[J].水科学进展,2011,22(5):703-709.
[14]高学睿,董斌,秦大庸,等.用DRAINMOD模型模拟稻田排水与氮素流失[J].农业工程学报,2011,27(6):52-58.
[15]王宁,俞双恩,叶兴成.DRAINMOD-NⅡ模拟暴雨后稻田排水及氮素变化[J].人民黄河,2014,36(10):136-140.