干旱区生态环境知识资源中心(Arid): Hydrologic Analysis of an Intensively Irrigated Area in Southern Peru Using a Crop-Field Scale Framework

Arid

DOI	10.3390/w13030318
	Hydrologic Analysis of an Intensively Irrigated Area in Southern Peru Using a Crop-Field Scale Framework
	Wei, Xiaolu; Garcia-Chevesich, Pablo; Alejo, Francisco; Garcia, Vilma; Martinez, Gisella; Daneshvar, Fariborz; Bowling, Laura C.; Gonzales, Edgard; Krahenbuhl, Richard; McCray, John E.
通讯作者	Wei, XL (corresponding author), Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA. ; Wei, XL (corresponding author), Colorado Sch Mines, Hydrol Sci & Engn, Golden, CO 80401 USA.
来源期刊	WATER
EISSN	2073-4441
出版年	2021
卷号	13 期号:3
英文摘要	Majes is one of the largest agricultural areas in the Arequipa region (southern Peru). Low seasonal precipitation and increasing water demands for agricultural irrigation, industry, and human consumption have made water supply projections a major concern. Agricultural development is becoming more extensive in this dry, sunny climate where crops can be grown year-round. However, because this type of project usually involves significant perturbations to the regional water cycle, understanding the effects of irrigation on local hydrology is crucial. Based on the watershed-scale Soil and Water Assessment Tool (SWAT), this investigation focuses on the impacts of intensive irrigation on hydrological responses in the Majes region. This study is unique because we allow for crop-field scale input within our regional-scale model to provide information at this smaller scale, which is important to inform local stakeholders and decision makers. Each hydrologic response unit (HRU) was generated to represent an individual crop field, so that management practices could be applied according to real-world scenarios. The management file of each HRU was modified to include different operation schedules for crop rotation, irrigation, harvest, and tillage. The model was calibrated and validated against monthly observed stream discharge during the 2009-2020 period. Additionally, evapotranspiration, irrigation water volume, and daily stream discharge downstream of the local river (Siguas) were used to verify the model performance. A total of 49 sub-basins and 4222 HRUs were created, with 3000 HRUs designated to represent individual crop fields. The simulation results revealed that infiltration from agricultural activities in Majes represents the majority of annual groundwater return flow, which makes a substantial contribution to streamflow downstream of the Siguas River. Simulations also suggested that groundwater flow processes and the interactions between surface and groundwater have a major impact on the water balance of the study area. Additionally, climate variability had a higher impact on surface runoff than on groundwater return flow, illustrating that the groundwater component in the study area is important for future water resources resiliency under expected climate change scenarios. Finally, there is a need to perform a follow-up implementation to provide a guideline for decision-makers to assess future sustainable water resources management under varying climatic conditions for this arid irrigated system.
英文关键词	SWAT modeling intensive irrigation hydrological responses southern Peru
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000615623000001
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348265
作者单位	[Wei, Xiaolu; Garcia-Chevesich, Pablo; McCray, John E.] Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO 80401 USA; [Wei, Xiaolu; Garcia-Chevesich, Pablo; McCray, John E.] Colorado Sch Mines, Hydrol Sci & Engn, Golden, CO 80401 USA; [Garcia-Chevesich, Pablo] UNESCO, Intergovernmental Hydrol Programme, Montevideo 11200, Uruguay; [Alejo, Francisco; Garcia, Vilma; Martinez, Gisella; Gonzales, Edgard] Univ Nacl San Agustin Arequipa, Ctr Mineria Sostenible, Arequipa 117, Peru; [Daneshvar, Fariborz; Bowling, Laura C.] Purdue Univ, Arequipa Nexus Inst, W Lafayette, IN 47907 USA; [Krahenbuhl, Richard] Colorado Sch Mines, Dept Geophys, Golden, CO 80401 USA; [Krahenbuhl, Richard] Colorado Sch Mines, Humanitarian Engn & Sci Program, Golden, CO 80401 USA
推荐引用方式 GB/T 7714	Wei, Xiaolu,Garcia-Chevesich, Pablo,Alejo, Francisco,et al. Hydrologic Analysis of an Intensively Irrigated Area in Southern Peru Using a Crop-Field Scale Framework[J],2021,13(3).
APA	Wei, Xiaolu.,Garcia-Chevesich, Pablo.,Alejo, Francisco.,Garcia, Vilma.,Martinez, Gisella.,...&McCray, John E..(2021).Hydrologic Analysis of an Intensively Irrigated Area in Southern Peru Using a Crop-Field Scale Framework.WATER,13(3).
MLA	Wei, Xiaolu,et al."Hydrologic Analysis of an Intensively Irrigated Area in Southern Peru Using a Crop-Field Scale Framework".WATER 13.3(2021).