干旱区生态环境知识资源中心(Arid): Water, agriculture, and climate dynamics in central Chile's Aconcagua River Basin

Arid

DOI	10.1080/02723646.2020.1790719
	Water, agriculture, and climate dynamics in central Chile's Aconcagua River Basin
	Webb, Mariana J.; Winter, Jonathan M.; Spera, Stephanie A.; Chipman, Jonathan W.; Osterberg, Erich C.
通讯作者	Webb, MJ
来源期刊	PHYSICAL GEOGRAPHY
ISSN	0272-3646
EISSN	1930-0557
英文摘要	Agriculture in the Aconcagua Basin is both vital to Chile's economy and critically dependent on water resources from snow and glaciers. Expanding croplands, a growing population, and a changing climate are all expected to exacerbate water scarcity in this arid region where agriculture requires 7.1 x 10(8) m(3)of water for irrigation annually. We investigate agricultural water resources in the Aconcagua Basin by examining the drivers of and trends in river discharge, calculating approximate crop water demand, and assessing the potential for future water scarcity given discharge rates and agricultural demand. We find that growing-season (October to March) discharge is significantly correlated with austral winter precipitation and the El Nino-Southern Oscillation. Austral winter precipitation provides snow that melts during the growing season, supplying water for agricultural irrigation. Time series analysis shows that temperature increased by 0.23 degrees C per decade between 1965 and 2017, and snow cover frequency decreased (2.7% per decade) over the relatively short time period of 2000 to 2017. Based on historical discharge data and our assessment of current agricultural water demand, we show that the Aconcagua Basin is already water-scarce, experiencing demand exceeding supply approximately three out of every 10 years.
英文关键词	Water resources glaciers irrigation Chile Aconcagua
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000551310700001
WOS关键词	ROCK GLACIERS ; STREAMFLOW ; PRECIPITATION ; AVAILABILITY ; MEGADROUGHT ; MANAGEMENT ; INVENTORY ; IMPACTS ; ANDES ; ENSO
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328108
作者单位	[Webb, Mariana J.; Winter, Jonathan M.; Spera, Stephanie A.; Chipman, Jonathan W.] Dartmouth Coll, Dept Geog, Hanover, NH 03755 USA; [Winter, Jonathan M.; Chipman, Jonathan W.; Osterberg, Erich C.] Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA; [Spera, Stephanie A.] Dartmouth Coll, Neukom Inst Computat Sci, Hanover, NH 03755 USA; [Spera, Stephanie A.] Univ Richmond, Dept Geog & Environm, Richmond, VA 23173 USA
推荐引用方式 GB/T 7714	Webb, Mariana J.,Winter, Jonathan M.,Spera, Stephanie A.,et al. Water, agriculture, and climate dynamics in central Chile's Aconcagua River Basin[J].
APA	Webb, Mariana J.,Winter, Jonathan M.,Spera, Stephanie A.,Chipman, Jonathan W.,&Osterberg, Erich C..
MLA	Webb, Mariana J.,et al."Water, agriculture, and climate dynamics in central Chile's Aconcagua River Basin".PHYSICAL GEOGRAPHY