干旱区生态环境知识资源中心(Arid): Multi-gauge Calibration for modeling the Semi-Arid Santa Cruz Watershed in Arizona-Mexico Border Area Using SWAT

Arid

DOI	10.4137/ASWR.S9410
	Multi-gauge Calibration for modeling the Semi-Arid Santa Cruz Watershed in Arizona-Mexico Border Area Using SWAT
	Niraula, Rewati; Norman, Laura M.; Meixner, Thomas; Callegary, James B.
通讯作者	Niraula, R
来源期刊	AIR SOIL AND WATER RESEARCH
ISSN	1178-6221
出版年	2012
卷号	5 页码:41-57
英文摘要	In most watershed-modeling studies, flow is calibrated at one monitoring site, usually at the watershed outlet. Like many arid and semi-arid watersheds, the main reach of the Santa Cruz watershed, located on the Arizona-Mexico border, is discontinuous for most of the year except during large flood events, and therefore the flow characteristics at the outlet do not represent the entire watershed. Calibration is required at multiple locations along the Santa Cruz River to improve model reliability. The objective of this study was to best portray surface water flow in this semi-arid watershed and evaluate the effect of multi-gauge calibration on flow predictions. In this study, the Soil and Water Assessment Tool (SWAT) was calibrated at seven monitoring stations, which improved model performance and increased the reliability of flow predictions, in the Santa Cruz watershed. The most sensitive parameters to affect flow were found to be curve number (CN2), soil evaporation and compensation coefficient (ESCO), threshold water depth in shallow aquifer for return flow to occur (GWQMN), base flow alpha factor (Alpha_Bf), and effective hydraulic conductivity of the soil layer (Ch_K2). In comparison, when the model was established with a single calibration at the watershed outlet, flow predictions at other monitoring gauges were inaccurate. This study emphasizes the importance of multi-gauge calibration to develop a reliable watershed model in arid and semi-arid environments. The developed model, with further calibration of water quality parameters will be an integral part of the Santa Cruz Watershed Ecosystem Portfolio Model (SCWEPM), an online decision support tool, to assess the impacts of climate change and urban growth in the Santa Cruz watershed.
英文关键词	SWAT semi-arid flow multi-gauge calibration Santa Cruz watershed
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000215299700004
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	University of Arizona ; United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/329977
作者单位	[Niraula, Rewati; Meixner, Thomas] Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA; [Norman, Laura M.] Western Geog Sci Ctr, US Geol Survey, Tucson, AZ USA; [Callegary, James B.] Arizona Water Sci Ctr, US Geol Survey, Tucson, AZ USA
推荐引用方式 GB/T 7714	Niraula, Rewati,Norman, Laura M.,Meixner, Thomas,et al. Multi-gauge Calibration for modeling the Semi-Arid Santa Cruz Watershed in Arizona-Mexico Border Area Using SWAT[J]. University of Arizona, United States Geological Survey,2012,5:41-57.
APA	Niraula, Rewati,Norman, Laura M.,Meixner, Thomas,&Callegary, James B..(2012).Multi-gauge Calibration for modeling the Semi-Arid Santa Cruz Watershed in Arizona-Mexico Border Area Using SWAT.AIR SOIL AND WATER RESEARCH,5,41-57.
MLA	Niraula, Rewati,et al."Multi-gauge Calibration for modeling the Semi-Arid Santa Cruz Watershed in Arizona-Mexico Border Area Using SWAT".AIR SOIL AND WATER RESEARCH 5(2012):41-57.