干旱区生态环境知识资源中心(Arid): Improving groundwater recharge estimates in alfalfa fields of New Mexico with actual evapotranspiration measurements

Arid

DOI	10.1016/j.agwat.2020.106532
	Improving groundwater recharge estimates in alfalfa fields of New Mexico with actual evapotranspiration measurements
	Boyko, Kevin; Fernald, Alexander G.; Bawazir, A. Salim
通讯作者	Boyko, K (corresponding author), New Mexico State Univ, New Mexico Water Resources Res Inst, MSC 3167,POB 30001, Las Cruces, NM 88003 USA.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	244
英文摘要	Quantifying groundwater recharge from irrigation practices of arid regions is necessary for efficient and sustainable groundwater resources management. Recharge is difficult to measure directly, many studies have quantified recharge from agricultural fields as a residual of the soil water balance method (WBM) or by other mathematical models estimating evapotranspiration (ET) and measuring soil moisture, rainfall, and irrigation. ET is often estimated using weather parameters from climate stations that are distant from crops. Flooding of fields is the most common form of irrigation used by farmers in the Mesilla Valley, New Mexico to grow alfalfa, one of the state's major crops. The objectives of this study were to quantify recharge in flood irrigated alfalfa fields in the Mesilla Valley, New Mexico using the WBM and actual ET measurements during the 2017 growing season. The study fields were different sizes, crop ages, and soil textures. Actual ET of alfalfa was measured on the largest field using the eddy covariance energy budget method and applied to the two other nearby fields as estimated ET. All other WBM parameters were measured at each study site (i.e. soil moisture, rainfall, and applied irrigation). Recharge using ET referenced to grass (ETsz) was then calculated using weather parameters and compared with measured ET. Recharge ranged from 618 to 716 mm with no significant statistical differences between the three alfalfa fields (f-ratio of 0.8876 and a p-value of 0.42 using ANOVA). Recharge to irrigation ratio ranged from 37% to 45%. On-farm irrigation efficiency ranged from 54.86% to 59.94%. When compared to measured ET, ETsz underestimated recharge of alfalfa by 11% in the WBM and overestimated recharge by 6% when a reduction in ETsz during harvest periods are considered. The results show that the measurement of actual ET improved recharge estimates in the alfalfa fields.
英文关键词	Flood irrigation Groundwater Deep percolation Soil moisture Eddy covariance
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000603305900007
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	New Mexico State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347656
作者单位	[Boyko, Kevin; Fernald, Alexander G.] New Mexico Water Resources Res Inst, Las Cruces, NM USA; [Fernald, Alexander G.] New Mexico State Univ, Dept Anim & Range Sci, Las Cruces, NM 88003 USA; [Bawazir, A. Salim] New Mexico State Univ, Dept Civil Engn, Las Cruces, NM 88003 USA; [Bawazir, A. Salim] Stanford Univ, ReNUWIt Engn Res Ctr, Stanford, CA USA
推荐引用方式 GB/T 7714	Boyko, Kevin,Fernald, Alexander G.,Bawazir, A. Salim. Improving groundwater recharge estimates in alfalfa fields of New Mexico with actual evapotranspiration measurements[J]. New Mexico State University,2021,244.
APA	Boyko, Kevin,Fernald, Alexander G.,&Bawazir, A. Salim.(2021).Improving groundwater recharge estimates in alfalfa fields of New Mexico with actual evapotranspiration measurements.AGRICULTURAL WATER MANAGEMENT,244.
MLA	Boyko, Kevin,et al."Improving groundwater recharge estimates in alfalfa fields of New Mexico with actual evapotranspiration measurements".AGRICULTURAL WATER MANAGEMENT 244(2021).