干旱区生态环境知识资源中心(Arid): Watershed water balance changes as furrow irrigation is converted to sprinkler irrigation in an arid region

Arid

DOI	10.2489/jswc.75.3.254
	Watershed water balance changes as furrow irrigation is converted to sprinkler irrigation in an arid region
	Bjorneberg, D. L.; King, B. A.; Koehn, A. C.
通讯作者	Bjorneberg, D. L.
来源期刊	JOURNAL OF SOIL AND WATER CONSERVATION
ISSN	0022-4561
EISSN	1941-3300
出版年	2020
卷号	75 期号:3 页码:254-262
英文摘要	Irrigation is the largest water use in the western United States. The Upper Snake Rock Conservation Effects Assessment Project in southern Idaho began in 2005 to quantify the impacts of conservation practices in this irrigated watershed. The objective of this study was to determine the changes in the watershed water balances as farmers converted furrow irrigated fields to sprinkler irrigation from 2006 to 2016. More than 75% of annual watershed inflow was irrigation water diverted into the watershed from the Snake River and distributed through canals to 82,000 ha of cropland, while annual precipitation was only 10% to 23% of the annual inflow. Approximately 30% of the annual watershed inflow flowed back to the Snake River as irrigation return flow Water balances showed that irrigation exceeded evapotranspiration (ET) in the spring and fall, indicating that irrigation diversions could be reduced early and late in the irrigation season. Annual irrigation project efficiency, defined as ET divided by the amount of diverted irrigation water, varied from 61% to 73%, but project efficiency did not increase as the amount of cropland that was sprinkler irrigated increased from 46% in 2006 to 59% in 2016. The only significant trends indicating that increasing sprinkler irrigation impacted the water balances were increasing irrigation project efficiency in July and increasing irrigation return flow during the irrigation season. Farmers may be applying less irrigation water with sprinkler irritation compared to furrow irrigation, which could have caused return flow to increase since irrigation diversions did not change with the supply-based water allocation. Irrigation scheduling based on soil moisture measurement or daily ET would help irrigation application match crop water needs on individual fields. For the entire irrigation project, irrigation efficiency could improve if irrigation diversions into the watershed could be adjusted to more closely match ET in the spring and fall, which may require structural changes to the canal system and policy changes for the Snake River reservoir system.
英文关键词	Conservation Effects Assessment Project (CEAP) irrigation efficiency irrigation return flow surface irrigation
类型	Article
语种	英语
国家	USA
开放获取类型	Green Published, Bronze
收录类别	SCI-E
WOS记录号	WOS:000532829500005
WOS关键词	EVAPOTRANSPIRATION ; QUALITY ; BASIN
WOS类目	Ecology ; Soil Science ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318598
作者单位	USDA ARS, Northwest Irrigat & Soils Res Lab, Kimberly, ID 83341 USA
推荐引用方式 GB/T 7714	Bjorneberg, D. L.,King, B. A.,Koehn, A. C.. Watershed water balance changes as furrow irrigation is converted to sprinkler irrigation in an arid region[J],2020,75(3):254-262.
APA	Bjorneberg, D. L.,King, B. A.,&Koehn, A. C..(2020).Watershed water balance changes as furrow irrigation is converted to sprinkler irrigation in an arid region.JOURNAL OF SOIL AND WATER CONSERVATION,75(3),254-262.
MLA	Bjorneberg, D. L.,et al."Watershed water balance changes as furrow irrigation is converted to sprinkler irrigation in an arid region".JOURNAL OF SOIL AND WATER CONSERVATION 75.3(2020):254-262.