Arid
DOI10.1016/j.agwat.2015.01.016
Water use by a groundwater dependent maize in a semi-arid region of Inner Mongolia: Evapotranspiration partitioning and capillary rise
Wu, Yao1; Liu, Tingxi1; Paredes, Paula2; Duan, Limin1; Pereira, Luis S.2
通讯作者Liu, Tingxi
来源期刊AGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
EISSN1873-2283
出版年2015
卷号152页码:222-232
英文摘要

This study aimed at assessing the soil water balance, groundwater contribution, crop transpiration and soil evaporation of a rainfed maize crop in Horqin sandy area, north-eastern Inner Mongolia, China. Two years of field data from the Agula site were used, 2008 with relatively high rainfall (363 mm) and high water table, and 2009 with low rainfall (125 mm) and lower water table. The SIMDualKc water balance model was calibrated with observed soil water content data of 2008 and validated with data of 2009. The model uses the dual crop coefficient approach for evapotranspiration (ET) partitioning, and parametric functions for computing capillary rise. The respective modelling results show that the groundwater contribution represented ca. 50% of crop ET in both years. Estimation errors are small, with root mean square errors of 0.007 and 0.008 cm(3) cm(-3) respectively in 2008 and 2009. The Nash and Sutcliffe modelling efficiency were high, 0.93 in both years, which indicates a low variance of residuals. The calibrated basal crop coefficient K-cd mid = 0.95 denotes a low density of the crop because it is much lower than common potential values. Soil evaporation was relatively low, 23% of ET in the wet year and 17% in the dry year, because capillary rise does not contribute to soil evaporation but to roots extraction only. Results show that capillary rise plays a main role in supplying the vegetation throughout the season, hence a strong dependence of vegetation upon groundwater. (C) 2015 Elsevier B.V. All rights reserved.


英文关键词SIMDualKc model Groundwater contribution Dual crop coefficients Crop transpiration Soil evaporation Groundwater dependent ecosystems
类型Article
语种英语
国家Peoples R China ; Portugal
收录类别SCI-E
WOS记录号WOS:000351806800022
WOS关键词HORQIN SANDY LAND ; CROP COEFFICIENT APPROACH ; YELLOW-RIVER BASIN ; NORTH CHINA PLAIN ; SHALLOW GROUNDWATER ; SOIL ; IRRIGATION ; MODEL ; WHEAT ; EVAPORATION
WOS类目Agronomy ; Water Resources
WOS研究方向Agriculture ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/185595
作者单位1.Inner Mongolia Agr Univ, Coll Water Conservancy & Civil Engn, Hohhot 010018, Peoples R China;
2.Univ Lisbon, Inst Agron, LEAF, P-1349017 Lisbon, Portugal
推荐引用方式
GB/T 7714
Wu, Yao,Liu, Tingxi,Paredes, Paula,et al. Water use by a groundwater dependent maize in a semi-arid region of Inner Mongolia: Evapotranspiration partitioning and capillary rise[J],2015,152:222-232.
APA Wu, Yao,Liu, Tingxi,Paredes, Paula,Duan, Limin,&Pereira, Luis S..(2015).Water use by a groundwater dependent maize in a semi-arid region of Inner Mongolia: Evapotranspiration partitioning and capillary rise.AGRICULTURAL WATER MANAGEMENT,152,222-232.
MLA Wu, Yao,et al."Water use by a groundwater dependent maize in a semi-arid region of Inner Mongolia: Evapotranspiration partitioning and capillary rise".AGRICULTURAL WATER MANAGEMENT 152(2015):222-232.
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