气候变化领域集成服务门户(CCPortal): Study on water and heat transport of different types of vegetations and fields in Pengbo alpine irrigation district of Qinghai Tibet Plateau

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DOI	10.1016/j.jhydrol.2023.129201
	Study on water and heat transport of different types of vegetations and fields in Pengbo alpine irrigation district of Qinghai Tibet Plateau
	Wang, Guoshuai; Tang, Pengcheng; Xu, Bing; Zhang, Chen; Tian, Delong; Ren, Jie; Li, Zekun
发表日期	2023
ISSN	0022-1694
EISSN	1879-2707
卷号	618
英文摘要	Many water-saving projects have been initiated in the typical alpine irrigation district in Tibet, which resulted in dramatic changes to the hydrothermal conversion process. There is an urgent need to fully understand the hy-drothermal transport process and to clarify the mechanism under which agricultural hydrology evolves in the alpine irrigation district of Tibet. This study selected highland barley field, oat field, wasteland (Natural herbage field without irrigation) in Pengbo irrigation district of Tibet as study objects to study soil water and heat dy-namics and soil water balance. Observed water and temperature data were used to calibrate and validate sim-ulations of the HYDRUS_1D model for 2019 and 2020, respectively. Simulations of soil water and temperature were in good agreement with the measured values, with determination coefficient of 0.69-0.91.This study proposes a set of hydrothermal parameters to fill the gap in the hydrothermal research of Tibet. The results showed that the variation of soil temperature was approximately sinusoidal, with a lag effect. The temperatures of the 0-20 cm and 30-50 cm soil layers lagged by about 1-2 h and 3-5 h, respectively. The highest rate of soil temperature increase occurred from the initial growth period to the rapid growth period during which the soil temperature of each layer increased by an average of 2 degrees C, however, the soil temperature in this period was not the most suitable for crop growth. Soil evaporation of highland barley field, oat field, and wasteland during the growth period accounted for 20 % - 29 %, 20 % - 29 %, 10 % - 18 % of the rainfall and irrigation, whereas transpiration accounted for 33 % - 43 %, 42 % - 50 %, and 36 % - 57 %, and percolation accounted for 42 %, 35-39 %, and 16-45 %, respectively. Implementation of water-saving projects resulted in reductions in irrigation volume and percolation rate. This study can provide a reference for clarifying the hydrothermal transport process and allocating agricultural water resources in the alpine irrigation district of Tibet.
关键词	Alpine irrigation district of Tibet Different types of vegetation and fields Hydrus_1D model Water and heat transport Water balance
英文关键词	SOIL-MOISTURE; RIVER-BASIN; EVAPOTRANSPIRATION; TEMPERATURE; MODELS; SYSTEM; STANDS; MAIZE; HETAO
WOS研究方向	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000942605400001
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/282642
作者单位	China Institute of Water Resources & Hydropower Research; China Institute of Water Resources & Hydropower Research
推荐引用方式 GB/T 7714	Wang, Guoshuai,Tang, Pengcheng,Xu, Bing,et al. Study on water and heat transport of different types of vegetations and fields in Pengbo alpine irrigation district of Qinghai Tibet Plateau[J],2023,618.
APA	Wang, Guoshuai.,Tang, Pengcheng.,Xu, Bing.,Zhang, Chen.,Tian, Delong.,...&Li, Zekun.(2023).Study on water and heat transport of different types of vegetations and fields in Pengbo alpine irrigation district of Qinghai Tibet Plateau.JOURNAL OF HYDROLOGY,618.
MLA	Wang, Guoshuai,et al."Study on water and heat transport of different types of vegetations and fields in Pengbo alpine irrigation district of Qinghai Tibet Plateau".JOURNAL OF HYDROLOGY 618(2023).