摘要
针对灌溉资料相对缺乏流域,以SWAT模型为基础,修改了其水稻田的自动灌溉制度,并构建了多水源综合灌溉模块。利用改进的SWAT模型估计灌溉需水量、灌溉回归水量及量化分析灌溉用水对水循环的影响。模型以模拟结果效率系数最优为调参依据,根据多水源灌溉规则制定灌溉方案参与水循环模拟。将构建的灌区模型应用于努敏河流域长阁灌区,结果表明改进模型具有较好的模拟精度,与原模型相比,四方台控制站月径流模拟Nash系数在率定期和检验期分别由0.79和0.74提高到0.89和0.81;灌区多年平均灌溉水量、灌溉回归水量、平均灌溉回归系数及多年平均灌溉消耗水量的值均表明在径流模拟中有必要考虑灌溉取用水的影响。
Due to the lack of irrigation observed data in paddy fields,a multiple water source module is add to SWAT to extract irrigation water and a new algorithm of automatic irrigation application is implemented.A modified SWAT model is used to simulate irrigation water demand and return and quantify analysis of irrigation water impact on hydrological cycle.According to the simulation accuracy,the optimal scenario based irrigation rules of multiple water sources is selected to simulate water cycle.And then it is applied to Changge Irrigation District in Numin River basin.Comparisons between the enhanced model and old one are conducted at the outlet in Sifangtai Hydrologic Station.The results show that the proposed SWAT has higher precision for calibration and validation periods and Nash coefficient of the simulated monthly runoff is increased from 0.79 and 0.74 to 0.89 and 0.81,respectively.In addition,the annual averaged irrigation water and return water,irrigation return flow coefficient,average annual consumption of irrigation water denote that it is necessary to consider the influence of irrigation water on runoff simulation.
出处
《水电能源科学》
北大核心
2010年第7期18-22,共5页
Water Resources and Power
基金
国家自然科学基金资助项目(50809010)
国家“十一五”科技支撑计划基金资助项目(2007BAB28B01)
