气候变化领域集成服务门户(CCPortal): Improved hydrological modelling and ET estimation in watershed with irrigation interference

CCPortal

DOI	10.1016/j.jhydrol.2024.131108
	Improved hydrological modelling and ET estimation in watershed with irrigation interference
	Liu, Yutong; Li, Fawen; Zhao, Yong
发表日期	2024
ISSN	0022-1694
EISSN	1879-2707
起始页码	634
卷号	634
英文摘要	Evapotranspiration (ET) is the true water consumption of the watershed and is key to achieving water conservation. The accurate estimation of ET by distributed hydrological model can provide an important basis for watershed water resources management. At present, the traditional approach calibrating distributed hydrological model parameters by runoff has low accuracy in watersheds under human interference. The reason is that the measured runoff is no longer natural due to various human activities such as river water withdrawals, reservoir regulation and inter -basin water transfer. While using ET for model calibration can effectively overcome this interference, making it a more accurate approach for watersheds under human interference. Therefore, we calibrated the Soil and Water Assessment Tool (SWAT) model using PMLV_2 ET in Ziya River under frequent human activities. The results indicated that calibrating the model with remote sensing ET could improve the model ' s simulation performance, increasing the NS from 0.65 to 0.83. However, the annual ET calculated by the model was 21.7% lower than PMLV_2 ET. The largest underestimation was for the annual ET of cropland (agricultural ET), which was underestimated by 24.4%. This is partly because the model did not account for irrigation evaporation from cropland. Therefore we used Landsat 8 data to extract the planting areas of winter wheat, which consumes the highest irrigation water in the Ziya River Basin, from 2013 to 2018. The planting areas and irrigation regimes of winter wheat were incorporated into the SWAT model to calculate the agricultural ET. The results indicate that the agricultural ET calculated by the SWAT model that considers irrigation evaporation is 6.9% lower than that of PMLV_2 ET. The simulation accuracy of ET is significantly improved. This study provides a reference for accurate estimation of agricultural ET and a basis for ET management.
英文关键词	Evapotranspiration (ET); Remote sensing; SWAT; Calibration; Extraction of planting structure; Irrigation evaporation
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001221961400001
来源期刊	JOURNAL OF HYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302020
作者单位	Tianjin University; China Institute of Water Resources & Hydropower Research
推荐引用方式 GB/T 7714	Liu, Yutong,Li, Fawen,Zhao, Yong. Improved hydrological modelling and ET estimation in watershed with irrigation interference[J],2024,634.
APA	Liu, Yutong,Li, Fawen,&Zhao, Yong.(2024).Improved hydrological modelling and ET estimation in watershed with irrigation interference.JOURNAL OF HYDROLOGY,634.
MLA	Liu, Yutong,et al."Improved hydrological modelling and ET estimation in watershed with irrigation interference".JOURNAL OF HYDROLOGY 634(2024).