气候变化领域集成服务门户(CCPortal): Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction

CCPortal

DOI	10.5194/hess-22-2921-2018
	Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction
	Fernández A.; Muñoz A.; González-Reyes A.; Aguilera-Betti I.; Toledo I.; Puchi P.; Sauchyn D.; Crespo S.; Frene C.; Mundo I.; González M.; Vignola R.
发表日期	2018
ISSN	1027-5606
起始页码	2921
结束页码	2935
卷号	22 期号:5
英文摘要	Streamflow in south-central Chile (SCC, ĝ1/4 ĝ€37-42°ĝ€S) is vital for agriculture, forestry production, hydroelectricity, and human consumption. Recent drought episodes have generated hydrological deficits with damaging effects on these activities. This region is projected to undergo major reductions in water availability, concomitant with projected increases in water demand. However, the lack of long-term records hampers the development of accurate estimations of natural variability and trends. In order to provide more information on long-term streamflow variability and trends in SCC, here we report findings of an analysis of instrumental records and a tree-ring reconstruction of the summer streamflow of the Río Imperial ( ĝ1/4 ĝ€37°ĝ€40′ĝ€S-38°ĝ€50′ĝ€S). This is the first reconstruction in Chile targeted at this season. Results from the instrumental streamflow record ( ĝ1/4 ĝ€1940 onwards) indicated that the hydrological regime is fundamentally pluvial with a small snowmelt contribution during spring, and evidenced a decreasing trend, both for the summer and the full annual record. The reconstruction showed that streamflow below the average characterized the post-1980 period, with more frequent, but not more intense, drought episodes. We additionally found that the recent positive phase of the Southern Annular Mode has significantly influenced streamflow. These findings agree with previous studies, suggesting a robust regional signal and a shift to a new hydrological scenario. In this paper, we also discuss implications of these results for water managers and stakeholders; we provide rationale and examples that support the need for the incorporation of tree-ring reconstructions into water resources management. © Author(s) 2018.
语种	英语
scopus关键词	Drought; Forestry; Stream flow; Accurate estimation; Forestry production; Hydrological regime; Hydrological scenarios; Southern Annular Mode; Streamflow variability; Tree-ring reconstruction; Water resources management; Water resources; climate signal; dendrochronology; drought; hydrological regime; paleohydrology; reconstruction; snowmelt; streamflow; water management; water resource; Chile
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160022
作者单位	Fernández, A., Departamento de Geografía, Universidad de Concepción, Concepción, Chile; Muñoz, A., Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; González-Reyes, A., Instituto de Ciencias de la Tierra, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Aguilera-Betti, I., Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile, Centro Transdisciplinario de Estudios Ambientales y Desarrollo Humano Sostenible (CEAM), Universidad Austral de Chile, Valdivia, Chile; Toledo, I., Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; Puchi, P., Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile, Dipartimento Territorio e Sistemi Agro-Forestali (TESAF), Università degli Studi di Padova, Agripolis, Italy; Sauchyn, D., Prairie Adaptation Research Collaborative, University of Regina, Saskatchewan, Canada; Crespo, S., Instituto de Geografía, Pontificia ...
推荐引用方式 GB/T 7714	Fernández A.,Muñoz A.,González-Reyes A.,et al. Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction[J],2018,22(5).
APA	Fernández A..,Muñoz A..,González-Reyes A..,Aguilera-Betti I..,Toledo I..,...&Vignola R..(2018).Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction.Hydrology and Earth System Sciences,22(5).
MLA	Fernández A.,et al."Dendrohydrology and water resources management in south-central Chile: Lessons from the Río Imperial streamflow reconstruction".Hydrology and Earth System Sciences 22.5(2018).