Spatial distribution and temporal variation of reference evapotranspiration in the Three Gorges Reservoir area during 1960–2013

Lv, Meng; Chen, Ji‐Long; Mirza, Zakaria A.; Chen, Chundi; Wen, Zhaofei; Jiang, Yi; Ma, Maohua; Wu, Shengjun

doi:10.1002/joc.4646

Cited by 20 publications

(11 citation statements)

References 105 publications

(167 reference statements)

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“…We further define two key source regions based on the trends shown in during the period. This is also in line with the increasing trend of reference evapotranspiration during 1982-2013 observed in Lv et al (2016). The values of Pearson correlation coefficient between annual TGRR precipitation and the moisture from the SWS region, the moisture from the SS region, and the contribution of local recycling are 0.68 (p<0.05), 0.28, and -0.61 (p<0.05), respectively.…”

Section: Temporal Trends Of Moisture Sources Of Precipitation In the supporting

confidence: 85%

Moisture sources contribute to precipitation change in the Three Gorges Reservoir Region during 1979–2015

Li¹,

Wang²,

Hui³

et al. 2020

Preprint

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Abstract. Precipitation change in the Three Gorges Reservoir Region (TGRR) plays a critical role in the operation and regulation of the Three Gorges Dam (TGD) as well as the protection of residents and properties. The potential impacts of the TGD on local and regional circulation patterns, especially the precipitation patterns, have received considerable attention since its construction. However, how the moisture transport affects the precipitation change in the TGRR spatially and temporally remains obscure. In this study, we investigate the long-term moisture sources of precipitation as well as their contributions to the precipitation change over the TGRR using an atmospheric moisture tracking model. Results suggest that although with seasonal variation, the moisture contributing to the TGRR precipitation primarily originate from the areas southwest of the TGRR dominated by the Indian summer monsoon. In particular, the sources with the highest annual moisture contribution are the southwestern part of the Yangtze River Basin and the southeastern tip of the Tibetan Plateau (TP). On average, 41 %, 56 %, and 3 % of the TGRR precipitation originate from ocean, land, and local recycling, respectively. In addition, the decreased precipitation over the TGRR during 1979–2015 is mainly attributed to the significantly decreased moisture contribution from the source regions southwest of the TGRR (especially around the southeastern tip of the TP). Compared to dry years, the higher precipitation in the TGRR during wet years is contributed by the extra moisture from the southwestern source regions delivered by the intensified southwesterly monsoon winds.

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Section: Temporal Trends Of Moisture Sources Of Precipitation In the supporting

confidence: 85%

Moisture sources contribute to precipitation change in the Three Gorges Reservoir Region during 1979–2015

Li¹,

Wang²,

Hui³

et al. 2020

Preprint

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“…However, due to the lack of long‐term and large‐scale observations of actual ET, there is still no definitive conclusion about the relationship between E pan and actual ET. Many studies have conducted extensive and in‐depth discussions about the estimated methods (Kisi, ; Valipour et al, ), spatiotemporal variation (Lv et al, ; McVicar et al, ), and influencing factors (Huo et al, ; Mosaedi et al, ) of ET 0 and the changes and optimization of the measurement methods of actual ET (Yang et al, ). However, previous studies considered the changes of ET 0 or actual ET separately, while an analysis of the trends in the difference between ET 0 and actual ET in the same area needs further development because a downward trend of actual ET does not mean that the same downward trend exists in ET 0 .…”

Section: Introductionmentioning

confidence: 99%

Analysis of Changes in Reference Evapotranspiration, Pan Evaporation, and Actual Evapotranspiration and Their Influencing Factors in the North China Plain During 1998–2005

Liu

Chen

Pan

2019

Earth and Space Science

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Evapotranspiration (ET) plays an important role in both energy and water balances. Determining changes in the different types of ET and their influencing factors under climate change is crucial to fully understand the mechanisms controlling ET and regional water cycles. Based on ET and meteorological data measured during 1998–2005 at the Yucheng Comprehensive Experimental Station of the Chinese Academy of Sciences, the variation of reference ET (ET0), pan evaporation (Epan), and lysimeter ET (the actual ET, Elys) were estimated. Together with a Mann‐Kendall trend test, correlation and sensitivity analyses were conducted to determine the effects of climatic factors, crop coefficients (Kc), and leaf area index (LAI) on different types of ET. During 1998–2005, precipitation presented an upward trend at all time scales, and average temperature (Ta), minimum temperature (Tmin), relative humidity, Epan, and ET0 exhibited downward trends. Elys displayed a downward trend at the daily scale and an upward trend at monthly and annual scales. The correlation analysis indicated that Epan and Elys were significantly positively correlated with all climatic factors except precipitation and relative humidity. The sensitivity analysis revealed that except for relative humidity, the influence of the other climatic factors on ET0 was positive. The highest sensitivity was found for relative humidity, followed by Ta, maximum temperature (Tmax), and Tmin. An analysis of the influence of Kc and LAI on the actual ET indicated that with an increase of Kc and LAI, the actual water demand of crops also displayed an upward trend.

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“…The reason may be that 75% of all of China's electricity is generated by coal-fired power plants [29], while only 4% is from gas-fired power plants [30]. 3The concepts of "water usage" was not defined precisely in some literature, such as Li's work [31].…”

Section: Overview Of Water Usage Factors For the Power Plants Studiedmentioning

confidence: 99%

“…According to the results in this paper, hydropower has greater water use intensity than other forms of generation most of the time. Besides, climate change is influenced by hydropower [78,79] and may lead to an increase in evaporation from reservoirs [31], which increases the water consumption of hydroelectricity. Thus, hydropower development has a negative impact on water security.…”

Section: The Effect Of the Energy Development Trend On Water Resourcementioning

confidence: 99%

Operational Water Withdrawal and Consumption Factors for Electricity Generation Technology in China—A Literature Review

et al. 2018

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As two indispensable resources for human development, energy and water are closely related. China, as the world's largest consumer of electricity, is also experiencing very serious water shortages. Understanding the water consumption intensity in various types of electric power production technologies according to China's national conditions is a prerequisite for understanding the potential impact of electrical power production on water resources. Therefore, following the steps of a meta-analysis, this paper provides a literature review on operational water withdrawal and consumption factors for electricity generation technology in China. We observed that 50% of water consumption for electricity generation was for coal power, whereas there was no research on the water consumption intensity of natural gas power generation, and a shortage of studies on water intake during electrical power production. The average water consumption intensity of hydropower is the largest. The results indicate that compared with other fuel types, hydropower is not a sustainable energy with respect to water conservation, and the study of hydropower applications should be improved in China.

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Spatial distribution and temporal variation of reference evapotranspiration in the Three Gorges Reservoir area during 1960–2013

Cited by 20 publications

References 105 publications

Moisture sources contribute to precipitation change in the Three Gorges Reservoir Region during 1979–2015

Moisture sources contribute to precipitation change in the Three Gorges Reservoir Region during 1979–2015

Analysis of Changes in Reference Evapotranspiration, Pan Evaporation, and Actual Evapotranspiration and Their Influencing Factors in the North China Plain During 1998–2005

Operational Water Withdrawal and Consumption Factors for Electricity Generation Technology in China—A Literature Review

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