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DRAINMOD模型参数灵敏度分析

作  者:
陈丽群;胡铁松
单  位:
武汉大学水资源与水电工程科学国家重点实验室
关键词:
DRAINMOD模型;参数率定;局部灵敏度分析;排水模拟
摘  要:
参数灵敏度分析对于合理确定模型参数具有重要意义。以五道沟水文水资源实验站为研究区域,采用局部灵敏度分析方法分析了DRAINMOD模型逐日排水量对侧向饱和导水率k、排水系数D.C以及地表最大积水深度Sm的灵敏度。理论分析与计算表明:不同的参数在不同的阶段对排水过程的影响呈现不同的规律,土壤侧向饱和导水率对排水过程的模拟结果影响最为显著,而其他参数的影响则相对较小。根据灵敏度分析结果进行调参,来有效地提高模型模拟的精度。
译  名:
Parameter Sensitivity Analysis of DRAINMOD
作  者:
CHEN Li-qun,HU Tie-song(State Key Laboratory of Water Resource and Hydropower Engineering Science,Wuhan University,Wuhan,430072,China)
关键词:
DRAINMOD;model calibration;local sensitivity analysis;drainage simulation
摘  要:
Parameter sensitivity analysis of hydrological is important for model calibration.In this paper,the Hydrology and water resources experiment Station of Wu Dao Gou is selected as the research area and the local sensitivity analysis is introduced into the parameter sensitivity analysis of DRAINMOD with the lateral sat.conductivity,the drainage coefficient,and the maximum surface storage were selected as the input of the model in drainage simulation.The theory analysis and calculation show that different parameters have different effects on the drainage process in different stages.The model is more sensitive to the lateral sat.conductivity than to other parameters.Based on the analysis result,the efficiency of model calibration can be significantly improved.

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