一维水分运移模型水力参数敏感性分析
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摘要
利用数值模拟方法模拟灌溉水入渗补给地下水的过程中,模型参数的不确定性是影响包气带水分运移的关键因素。因此,为了定量分析水力参数的不确性对剖面含水率空间分布的影响。基于新疆伊犁霍城县原位试验场灌溉实验,以剖面含水率为研究对象,运用HYDRUS软件建立一维非饱和数值模型,利用局部分析方法,研究水力参数空间不确定性对剖面含水率的影响,并对水力参数的敏感指数进行分析与对比。研究表明:非均质岩层中,细颗粒中θs和n对剖面含水率影响最大,在粗颗粒中,θr对剖面含水率影响最大。
In the process of simulating the infiltration of irrigation water into groundwater by numerical simulation, the uncertainty of the model parameters is a key factor affecting the moisture migration in the unsaturated zone. Therefore, in order to quantitatively analyze the influence of the uncertainty of the hydraulic parameters on the spatial distribution of the profile moisture content. Based on the irrigation experiment in Huocheng County in Ili, Xinjiang, this paper uses the HYDRUS software to establish a one-dimensional non-saturated numerical model and uses the partial analysis method to study the spatial uncertainty of the hydraulic parameters. The impact and sensitivity index of the parameters are analyzed and compared. Studies have shown that in heterogeneous rock formations, the fine particle neutralization has the greatest effect on the moisture content of the profile, and in the coarse grains, it has the greatest effect on the profile moisture content.
In the process of simulating the infiltration of irrigation water into groundwater by numerical simulation, the uncertainty of the model parameters is a key factor affecting the moisture migration in the unsaturated zone. Therefore, in order to quantitatively analyze the influence of the uncertainty of the hydraulic parameters on the spatial distribution of the profile moisture content. Based on the irrigation experiment in Huocheng County in Ili, Xinjiang, this paper uses the HYDRUS software to establish a one-dimensional non-saturated numerical model and uses the partial analysis method to study the spatial uncertainty of the hydraulic parameters. The impact and sensitivity index of the parameters are analyzed and compared. Studies have shown that in heterogeneous rock formations, the fine particle neutralization has the greatest effect on the moisture content of the profile, and in the coarse grains, it has the greatest effect on the profile moisture content.
引文
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[20] 王权威,唐莉.水文模型参数综合敏感性系数分析[J].水力发电,2017,43(6):16-18.
[21] 黄清华,张万昌.SWAT模型参数敏感性分析及应用[J].干旱区地理,2010,33(1):8-15.
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[23] 霍思远,靳孟贵.Van Genuchten模型参数对降水入渗数值模拟的敏感性[J].地球科学-中国地质大学学报,2017,42(3):447-452.
[24] 范严伟,赵文举,毕贵权.Van Genuchten模型参数变化对土壤入渗特性的影响分析[J].中国农村水利水电,2016(3):52-56.
[25] 陈卫金,程东会,陶伟.van Genuchten模型参数的物理意义[J].水文地质工程地质,2017,44(6):147-15.
[2] 林丹.包气带变化及其对地下水补给的影响[D].武汉:中国地质大学,2014.
[3] 赵丽.中宁平原包气带水分运移对地下水补给和蒸发的影响[D].北京:中国地质大学(北京),2016.
[4] Confalonieri R,Bellocchi G,Tarantola S,et al.Sensitivity analysis of the rice model WARM in Europe:exploring the effects of different locations,climates and methods of analysis on model sensitivity to crop parameters.[J].Environmental Modelling & Software,2010,25(4):479-488.
[5] 鲁程鹏,束龙仓,刘丽红,等.基于灵敏度分析的地下水数值模拟精度适应性评价[J].河海大学学报(自然科学版),2010,38(1):26-30.
[6] 王志涛,缴锡云,韩红亮,等.土壤垂直一维入渗对VG模型参数的敏感性分析[J].河海大学学报(自然科学版),2013,41(1):80-84.
[7] 毕经伟,张佳宝,陈效民,等.农田土壤中土壤水渗漏与硝态氮淋失的模拟研究[J].灌溉排水学报,2003,22(6):23-26.
[8] 孟江丽.水盐和排水系统的模拟研究[D].乌鲁木齐:新疆农业大学,2004.
[9] 张添,黄春林,沈焕锋.土壤水分对土壤参数的敏感性及其参数优化方法研究[J].地球科学进展,2012,27(6):678-685.
[10] J Simunek,H Saito,M Sakai,et al.The HYDRUS-1D Software Package for Simulating the One-Dimensional Movement of Water,Heat,and Multiple Solutes in Variably-Saturated Media[J].Dep.of Environmental Sciences Univ.of California Riverside,2005,68.
[11] 马欢,杨大文,雷慧闽,等.Hydrus-1D模型在田间水循环规律分析中的应用及改进[J].农业工程学报,2011,27(3):6-12.
[12] 霍思远,靳孟贵.不同降水及灌溉条件下的地下水入渗补给规律[J].水文地质工程地质,2015,42(5):6-13.
[13] WenZhi,ZENG,JingWei,et al.Soil salt leaching under different irrigation regimes:HYDRUS-1D modelling and analysis[J].Journal of Arid Land,2014,6(1):44-58.
[14] Ladu J L C,Demetry P L,Henry T O,et al.Modeling storm water runoff from green roofs with HYDRUS-1D[J].Journal of Hydrology,2010,358:288-293.
[15] Genuchten M T V.A closed-form equation for predicting the hydraulic conductivity of unsaturated soils.[J].Soil Science Society of America Journal,1980,44(44):892-898.
[16] 刘亚磊,梁杏,林丹,等.稳定蒸发条件下的深厚包气带土壤水力参数测试——以辛集新城地区为例[J].中国农村水利水电,2013(10):27-32.
[17] 于洋,韩鹏,林谧.半干旱地区包气带-饱和带水盐耦合模拟[J].干旱区研究,2017,34(4):741-747.
[18] 王尚义,牛俊杰,朱炜歆,等.晋西北矿区、非矿区不同植被下土壤水分特征[J].干旱区研究,2013,30(6):986-991.
[19] 刘建军,王全九,王卫华,等.利用Hydrus-1D反推土壤水力参数方法分析[J].世界科技研究与发展,2010,32(2):173-175.
[20] 王权威,唐莉.水文模型参数综合敏感性系数分析[J].水力发电,2017,43(6):16-18.
[21] 黄清华,张万昌.SWAT模型参数敏感性分析及应用[J].干旱区地理,2010,33(1):8-15.
[22] 邵明安,王全九,黄明斌.土壤物理学[M].北京:高等教育出版社,2006.
[23] 霍思远,靳孟贵.Van Genuchten模型参数对降水入渗数值模拟的敏感性[J].地球科学-中国地质大学学报,2017,42(3):447-452.
[24] 范严伟,赵文举,毕贵权.Van Genuchten模型参数变化对土壤入渗特性的影响分析[J].中国农村水利水电,2016(3):52-56.
[25] 陈卫金,程东会,陶伟.van Genuchten模型参数的物理意义[J].水文地质工程地质,2017,44(6):147-15.